Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/answer the following (Any seven question
only):
Which of the following is a renewable source of energy?
Which gas is primarily produced in a biogas plant?
Which of the following is an extensive property of a thermodynamic system?
Which of the following statements is TRUE about internal energy?
Which of the following represents a cyclic process?
In a vapour compression refrigeration cycle, the refrigerant absorbs heat in which component?
Which of the following is the main advantage of vapour absorption refrigeration over vapour compression refrigeration?
In a simple steam turbine, the energy conversion primarily occurs from
In a thermal power plant, the working fluid used in the Rankine cycle is
Which of the following is a ferrous metal?
Q.2 Solve both questions :
Describe biogas and biomass energy. Mention their merits, demerits, and major applications.
Explain the origin and forms of renewable energy sources such as solar and wind energy.
Q.3 Solve both questions :
What are non-renewable or conventional sources of energy? Explain fossil fuels with examples.
Compare renewable and non-renewable energy sources in terms of availability, environmental impact, and sustainability.
Q.4 Solve both questions :
Define a thermodynamic system. Explain its types with suitable examples.
Explain the concepts of state, process, and cycle in thermodynamics with diagrams.
Q.5 Solve both questions :
Explain the principle of operation of a vapour compression refrigeration system with the help of a neat sketch.
Compare vapour absorption and vapour compression refrigeration systems in terms of energy source efficiency and applications.
Q.6 Solve both questions :
Explain the working principle of a simple steam turbine with a neat sketch.
Compare SI (Spark Ignition) and CI (Compression Ignition) engines in terms of fuel used, ignition method, and applications.
Q.7 Solve both questions :
Describe the main components and working of hydel power plant.
Discuss the principle of nuclear power generation. What are its advantages and disadvantages compared to thermal power plants?
Q.8 Solve both questions :
Define ferrous and non-ferrous metals with examples.
Explain the mechanical properties of engineering materials such as strength, hardness, and resilience with suitable examples.
Q.9 Solve both questions :
What is quenching? Discuss the types of quenching media and their influence on steel hardness.
Define case-hardening. Explain its methods and applications in engineering components.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/answer the following (Any seven question
only):
Which of the following is a renewable source of energy?
Which gas is primarily produced in a biogas plant?
Which of the following is an extensive property of a thermodynamic system?
Which of the following statements is TRUE about internal energy?
Which of the following represents a cyclic process?
In a vapour compression refrigeration cycle, the refrigerant absorbs heat in which component?
Which of the following is the main advantage of vapour absorption refrigeration over vapour compression refrigeration?
In a simple steam turbine, the energy conversion primarily occurs from
In a thermal power plant, the working fluid used in the Rankine cycle is
Which of the following is a ferrous metal?
Q.2 Solve both questions :
Describe biogas and biomass energy. Mention their merits, demerits, and major applications.
Explain the origin and forms of renewable energy sources such as solar and wind energy.
Q.3 Solve both questions :
What are non-renewable or conventional sources of energy? Explain fossil fuels with examples.
Compare renewable and non-renewable energy sources in terms of availability, environmental impact, and sustainability.
Q.4 Solve both questions :
Define a thermodynamic system. Explain its types with suitable examples.
Explain the concepts of state, process, and cycle in thermodynamics with diagrams.
Q.5 Solve both questions :
Explain the principle of operation of a vapour compression refrigeration system with the help of a neat sketch.
Compare vapour absorption and vapour compression refrigeration systems in terms of energy source efficiency and applications.
Q.6 Solve both questions :
Explain the working principle of a simple steam turbine with a neat sketch.
Compare SI (Spark Ignition) and CI (Compression Ignition) engines in terms of fuel used, ignition method, and applications.
Q.7 Solve both questions :
Describe the main components and working of hydel power plant.
Discuss the principle of nuclear power generation. What are its advantages and disadvantages compared to thermal power plants?
Q.8 Solve both questions :
Define ferrous and non-ferrous metals with examples.
Explain the mechanical properties of engineering materials such as strength, hardness, and resilience with suitable examples.
Q.9 Solve both questions :
What is quenching? Discuss the types of quenching media and their influence on steel hardness.
Define case-hardening. Explain its methods and applications in engineering components.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/answer the following (Any seven question
only):
Which of the following is a renewable source of energy?
Which gas is primarily produced in a biogas plant?
Which of the following is an extensive property of a thermodynamic system?
Which of the following statements is TRUE about internal energy?
Which of the following represents a cyclic process?
In a vapour compression refrigeration cycle, the refrigerant absorbs heat in which component?
Which of the following is the main advantage of vapour absorption refrigeration over vapour compression refrigeration?
In a simple steam turbine, the energy conversion primarily occurs from
In a thermal power plant, the working fluid used in the Rankine cycle is
Which of the following is a ferrous metal?
Q.2 Solve both questions :
Describe biogas and biomass energy. Mention their merits, demerits, and major applications.
Explain the origin and forms of renewable energy sources such as solar and wind energy.
Q.3 Solve both questions :
What are non-renewable or conventional sources of energy? Explain fossil fuels with examples.
Compare renewable and non-renewable energy sources in terms of availability, environmental impact, and sustainability.
Q.4 Solve both questions :
Define a thermodynamic system. Explain its types with suitable examples.
Explain the concepts of state, process, and cycle in thermodynamics with diagrams.
Q.5 Solve both questions :
Explain the principle of operation of a vapour compression refrigeration system with the help of a neat sketch.
Compare vapour absorption and vapour compression refrigeration systems in terms of energy source efficiency and applications.
Q.6 Solve both questions :
Explain the working principle of a simple steam turbine with a neat sketch.
Compare SI (Spark Ignition) and CI (Compression Ignition) engines in terms of fuel used, ignition method, and applications.
Q.7 Solve both questions :
Describe the main components and working of hydel power plant.
Discuss the principle of nuclear power generation. What are its advantages and disadvantages compared to thermal power plants?
Q.8 Solve both questions :
Define ferrous and non-ferrous metals with examples.
Explain the mechanical properties of engineering materials such as strength, hardness, and resilience with suitable examples.
Q.9 Solve both questions :
What is quenching? Discuss the types of quenching media and their influence on steel hardness.
Define case-hardening. Explain its methods and applications in engineering components.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/answer the following (Any seven question
only):
Which of the following is a renewable source of energy?
Which gas is primarily produced in a biogas plant?
Which of the following is an extensive property of a thermodynamic system?
Which of the following statements is TRUE about internal energy?
Which of the following represents a cyclic process?
In a vapour compression refrigeration cycle, the refrigerant absorbs heat in which component?
Which of the following is the main advantage of vapour absorption refrigeration over vapour compression refrigeration?
In a simple steam turbine, the energy conversion primarily occurs from
In a thermal power plant, the working fluid used in the Rankine cycle is
Which of the following is a ferrous metal?
Q.2 Solve both questions :
Describe biogas and biomass energy. Mention their merits, demerits, and major applications.
Explain the origin and forms of renewable energy sources such as solar and wind energy.
Q.3 Solve both questions :
What are non-renewable or conventional sources of energy? Explain fossil fuels with examples.
Compare renewable and non-renewable energy sources in terms of availability, environmental impact, and sustainability.
Q.4 Solve both questions :
Define a thermodynamic system. Explain its types with suitable examples.
Explain the concepts of state, process, and cycle in thermodynamics with diagrams.
Q.5 Solve both questions :
Explain the principle of operation of a vapour compression refrigeration system with the help of a neat sketch.
Compare vapour absorption and vapour compression refrigeration systems in terms of energy source efficiency and applications.
Q.6 Solve both questions :
Explain the working principle of a simple steam turbine with a neat sketch.
Compare SI (Spark Ignition) and CI (Compression Ignition) engines in terms of fuel used, ignition method, and applications.
Q.7 Solve both questions :
Describe the main components and working of hydel power plant.
Discuss the principle of nuclear power generation. What are its advantages and disadvantages compared to thermal power plants?
Q.8 Solve both questions :
Define ferrous and non-ferrous metals with examples.
Explain the mechanical properties of engineering materials such as strength, hardness, and resilience with suitable examples.
Q.9 Solve both questions :
What is quenching? Discuss the types of quenching media and their influence on steel hardness.
Define case-hardening. Explain its methods and applications in engineering components.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/answer the following (Any seven question
only):
Which of the following is a renewable source of energy?
Which gas is primarily produced in a biogas plant?
Which of the following is an extensive property of a thermodynamic system?
Which of the following statements is TRUE about internal energy?
Which of the following represents a cyclic process?
In a vapour compression refrigeration cycle, the refrigerant absorbs heat in which component?
Which of the following is the main advantage of vapour absorption refrigeration over vapour compression refrigeration?
In a simple steam turbine, the energy conversion primarily occurs from
In a thermal power plant, the working fluid used in the Rankine cycle is
Which of the following is a ferrous metal?
Q.2 Solve both questions :
Describe biogas and biomass energy. Mention their merits, demerits, and major applications.
Explain the origin and forms of renewable energy sources such as solar and wind energy.
Q.3 Solve both questions :
What are non-renewable or conventional sources of energy? Explain fossil fuels with examples.
Compare renewable and non-renewable energy sources in terms of availability, environmental impact, and sustainability.
Q.4 Solve both questions :
Define a thermodynamic system. Explain its types with suitable examples.
Explain the concepts of state, process, and cycle in thermodynamics with diagrams.
Q.5 Solve both questions :
Explain the principle of operation of a vapour compression refrigeration system with the help of a neat sketch.
Compare vapour absorption and vapour compression refrigeration systems in terms of energy source efficiency and applications.
Q.6 Solve both questions :
Explain the working principle of a simple steam turbine with a neat sketch.
Compare SI (Spark Ignition) and CI (Compression Ignition) engines in terms of fuel used, ignition method, and applications.
Q.7 Solve both questions :
Describe the main components and working of hydel power plant.
Discuss the principle of nuclear power generation. What are its advantages and disadvantages compared to thermal power plants?
Q.8 Solve both questions :
Define ferrous and non-ferrous metals with examples.
Explain the mechanical properties of engineering materials such as strength, hardness, and resilience with suitable examples.
Q.9 Solve both questions :
What is quenching? Discuss the types of quenching media and their influence on steel hardness.
Define case-hardening. Explain its methods and applications in engineering components.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/Fill in the blanks of the following (any seven):
Which of the following statements is wrong?
Which of the following is considered to be superior quality coal for power plants?
Which of the following methods is adopted for governing of steam turbines in a power plant?
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
Any change that a system undergoes from one equilibrium state to another is known as
The vapour compression refrigerator employs which of the following cycles?
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of
A turbine is said to have an axial discharge when the steam leaves the blade tip at ............ to the direction of the blade motion.
Cold work components are generally subjected to
Q.2 Answer both questions:
What are the advantages and disadvantages in using the following energy resources?
- Solar energy
- Hydropower
- Wind energy
- Biomass energy
Derive the characteristics equation of a perfect gas.
Q.3 Answer both questions:
Explain with a neat sketch the Babcock and Wilcox water-tube boiler. Show path of the gases and water in it.
A sample of wet steam at a pressure of 25 bar absolute has dryness fraction 0.80. Determine its enthalpy and internal energy.
Q.4 Answer both questions:
Derive an equation for work done in case of single stage single-acting reciprocating air compressor neglecting clearance.
What do you understand by mechanical and thermal efficiency? A steam plant uses 3 tonnes of coal/hr. The steam is fed to turbine the output of which is 4 MW. The calorific value of the coal is 30 MJ/kg. Calculate the thermal efficiency of the plant.
Q.5 Answer both questions:
Explain strength, hardness and resilience.
Give the Kelvin-Planck statement and the Clausius statement of second law of thermodynamics. Show that they are equivalent.
Q.6 Answer both questions:
What is prime mover? How are they classified?
What do you mean by boiler mountings and accessories? List at least five boiler mountings and explain any one with neat sketch.
Q.7 Answer both questions:
Derive the expression for the efficiency of the Carnot cycle.
In an ideal Diesel cycle, the temperatures at the beginning and at the end of compression are $ 57^\circ\text{C} $ and $ 603^\circ\text{C} $. The temperatures at the beginning and at the end of expansion are $ 1950^\circ\text{C} $ and $ 870^\circ\text{C} $. Find the ideal efficiency of the cycle. If the pressure is 1 bar, find the maximum pressure in the cycle.
Q.8 Answer both questions:
Draw working fluid flow diagram of the vapour compression refrigeration system and describe the function of each important component of the system.
Explain the principles of air-conditioning systems.
Q.9 Answer both questions:
Differentiate between annealing and tempering.
Discuss briefly tool steels and give its practical application.
Instructions:
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
- The marks are indicated in the right-hand margin.
Q.1 Choose the correct/best answer from the following (any seven):
The formation of frost on cooling coils in a refrigerator:
Which of the following statement is wrong?
Naptha is a volatile colourless product obtained from:
For the same compression ratio, the efficiency of dual combustion cycle is:
While designing the refrigeration system of an aircraft, the prime consideration is that the:
The vapour compression refrigerator employs the following cycle:
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be:
An aircraft gas turbine operates on:
A turbine is said to have an axial discharge when the steam leaves the blade tip at ............... in the direction of the blade motion.
Cold work components are generally subjected to:
Q.2 Answer both questions:
List the various Liquid fuels. State its merits over solid fuels.
Differentiate between fire tube and water tube boiler.
Q.3 Answer both questions:
Explain with a neat sketch Lancashire boiler.
Five kg of air is heated from initial volume of $ 0.5\text{ m}^3 $ to final volume of $ 1.3\text{ m}^3 $ at constant pressure 4 bar. Determine (1) heat supplied (2) workdone (3) initial and final temperature of air. Take $ C_p = 1.005\text{ kJ/kg-K} $ and $ R = 0.287\text{ kJ/kg-K} $.
Q.4 Answer both questions:
Differentiate between four-stroke and two-stroke I.C. engines.
A sample of wet steam at a pressure of 25 bar absolute has dryness fraction 0.80. Determine its enthalpy and internal energy.
Q.5 Answer both questions:
Explain the various method of case-hardening.
What do you understand by mechanical and thermal efficiency? A steam plant uses 3 tonne of coal/hr. The steam is fed to turbine the output of which is 4 MW. The calorific value of the coal is 30 MJ/kg. Calculate the thermal efficiency of the plant.
Q.6 Answer both questions:
What is prime mover? How are they classified?
What do you mean by boiler mountings and accessories? List at least five boiler mountings and explain any one with neat sketch.
Q.7 Answer both questions:
Explain with a neat sketch the working of a vapour compression refrigerator.
In an ideal Diesel cycle the temperature at the beginning and at the end of compression are $ 57^\circ\text{C} $ and $ 603^\circ\text{C} $. The temperature at the beginning and at the end of expansion are $ 1950^\circ\text{C} $ and $ 870^\circ\text{C} $. Find the ideal efficiency of the cycle. If the pressure is 1 bar find the maximum pressure in the cycle.
Q.8 Answer both questions:
Draw working fluid flow diagram of the Vapour Compression Refrigeration System and describe the function of each important component of the system.
What do you understand by mechanical and thermal efficiency? A steam plant uses 3 tonne of coal/hr. The steam is fed to turbine the output of which is 4 MW. The calorific value of the coal is 30 MJ/kg. Calculate the thermal efficiency of the plant.
Q.9 Answer both questions:
When quenching is desired? Explain the various quenching methods.
Discuss briefly tool steels and give its practical application.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Answer the following/Choose the correct option (any
seven):
Give two examples of secondary energy sources.
Which quality of coal is most suitable for thermal power plant?
Ice kept in a wall insulated thermos flask is an example of which system?
The long tube that carries water from the dam to the turbine is called
The processes of generation of steam in the pressure cooker is an example of
In a boiler, the air preheater is invariably located between
In an aqua-ammonia absorption refrigeration system, the ammonia vapours are produced at high pressure in the
The component which maintains a constant angular motion of the crank within a cycle is called
In a four-stroke cycle diesel engine, during suction stroke
The property of material to resist fracture under impact loading is called
Q.2 Solve both questions :
What are the advantages and disadvantages of renewable sources of energy?
What are the applications of solar energy? Discuss the working of a solar plate collector with the help of a suitable neat sketch.
Q.3 Solve both questions :
Explain the thermodynamic equilibrium.
Air initially at a pressure of 75 kPa and temperature of 1000 K and occupying a volume of 0·12 m$^3$ is compressed isothermally until the volume is halved. Subsequently, the volume undergoes further compression at constant pressure till it is halved again. Calculate the work done.
Q.4 Solve all parts :
Define a boiler as per IBR. What are the purposes of steam generation?
What is natural and forced circulation boiler?
Explain the working of water level indicator with suitable diagram.
Q.5 Solve all parts :
Explain the working principle of reaction turbine.
State the merits of gas turbine over IC engine.
What are the applications of gas turbine?
Q.6 Solve both questions :
How do you classify IC engines? Represent Otto and Diesel cycle on $p-v$ and $T-S$ plot.
Derive an expression for air standard efficiency of Otto cycle.
Q.7 Solve both questions :
Give the complete layout of steam power plant showing the appropriate position of economiser, air preheater, cooling tower and feed pump.
What are the advantages and disadvantages of hydroelectric power plant?
Q.8 Solve all parts :
What is the principle of refrigeration?
Compare the vapour absorption refrigeration system with vapour compression refrigeration system.
Define air-conditioning.
Q.9 Solve both questions :
What is heat treatment of metals? What is quenching?
What are the classifications of plain carbon steel? What are their properties and applications?
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Answer the following/Choose the correct option (any
seven):
Give two examples of secondary energy sources.
Which quality of coal is most suitable for thermal power plant?
Ice kept in a wall insulated thermos flask is an example of which system?
The long tube that carries water from the dam to the turbine is called
The processes of generation of steam in the pressure cooker is an example of
In a boiler, the air preheater is invariably located between
In an aqua-ammonia absorption refrigeration system, the ammonia vapours are produced at high pressure in the
The component which maintains a constant angular motion of the crank within a cycle is called
In a four-stroke cycle diesel engine, during suction stroke
The property of material to resist fracture under impact loading is called
Q.2 Solve both questions :
What are the advantages and disadvantages of renewable sources of energy?
What are the applications of solar energy? Discuss the working of a solar plate collector with the help of a suitable neat sketch.
Q.3 Solve both questions :
Explain the thermodynamic equilibrium.
Air initially at a pressure of 75 kPa and temperature of 1000 K and occupying a volume of 0·12 m$^3$ is compressed isothermally until the volume is halved. Subsequently, the volume undergoes further compression at constant pressure till it is halved again. Calculate the work done.
Q.4 Solve all parts :
Define a boiler as per IBR. What are the purposes of steam generation?
What is natural and forced circulation boiler?
Explain the working of water level indicator with suitable diagram.
Q.5 Solve all parts :
Explain the working principle of reaction turbine.
State the merits of gas turbine over IC engine.
What are the applications of gas turbine?
Q.6 Solve both questions :
How do you classify IC engines? Represent Otto and Diesel cycle on $p-v$ and $T-S$ plot.
Derive an expression for air standard efficiency of Otto cycle.
Q.7 Solve both questions :
Give the complete layout of steam power plant showing the appropriate position of economiser, air preheater, cooling tower and feed pump.
What are the advantages and disadvantages of hydroelectric power plant?
Q.8 Solve all parts :
What is the principle of refrigeration?
Compare the vapour absorption refrigeration system with vapour compression refrigeration system.
Define air-conditioning.
Q.9 Solve both questions :
What is heat treatment of metals? What is quenching?
What are the classifications of plain carbon steel? What are their properties and applications?
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/Fill in the blanks of the following (any
seven):
Work done in a free expansion process, is
Entropy change depends on
In case of gas turbine, the gaseous fuel consumption guarantees are based on
Mach number is defined as ______
Equivalent evaporation of a boiler is defined as ______
Cycle efficiency of a modern thermal power plant is approximately
For supersonic flow, the converging duct is
The ideal refrigeration cycle in aircraft is
The working substance in Rankine cycle
The critical pressure of the steam is
Q.2 Solve all parts :
What is wind power plant? Define the types of windmill.
Explain the construction and working of a Janata Model Gobar Gas Plant.
Q.3 Solve both questions :
A fluid system undergoes a non-flow frictionless process following the pressure-volume
relation as $p = 5 / v + 1.5$, where $p$ is in bar and $v$ is in m$^3$. During
the process, the volume changes from 0.15 m$^3$ and the system rejects 45 kJ of heat.
Determine the—
(i) change in internal energy;
(ii) change in enthalpy.
1 kg of steam at 8 bar, entropy 6.55 kJ/kg-K, is heated reversibly at constant pressure until the temperature is 200 °C. Calculate the heat supplied and show on a $T-S$ diagram the area which represents the heat flow.
Q.4 Solve this question :
Explain boiler mountings and accessories. Sketch any two.
Enumerate the factors which should be considered while selecting a boiler.
Q.5 Solve both questions :
A 4-cylinder two-stroke cycle petrol engine develops 30 kW at 2500 r.p.m. The mean effective pressure on each piston is 8 bar and mechanical efficiency is 80%. Calculate the diameter and stroke of each cylinder of stroke to bore ratio 1.5. Also calculate the fuel consumption of the engine, if brake efficiency is 28%. The calorific value is in J/kg.
What are the two basic types of internal combustion engines? What are the fundamental differences between the two?
Q.6 Solve this question :
Describe the working principle of thermal power plant with a neat sketch.
Describe the working principle of nuclear power plant with a neat sketch.
Q.7 Solve both questions :
Differentiate clearly between open and closed air refrigeration systems.
Enumerate the main parts of the equipment in the air-conditioning cycle.
Q.8 Solve all parts :
Name various ores of iron and explain the process of manufacturing pig iron from them.
Compare the construction and working of blast furnace and cupola. Explain the method of operation of cupola.
Q.9 Solve this question :
Compare recrystallization in steel caused by an allotropic change and recrystallization due to cold working.
Draw iron-carbon equilibrium diagram and show their salient features.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option/Fill in the blanks of the following (any
seven):
Work done in a free expansion process, is
Entropy change depends on
In case of gas turbine, the gaseous fuel consumption guarantees are based on
Mach number is defined as ______
Equivalent evaporation of a boiler is defined as ______
Cycle efficiency of a modern thermal power plant is approximately
For supersonic flow, the converging duct is
The ideal refrigeration cycle in aircraft is
The working substance in Rankine cycle
The critical pressure of the steam is
Q.2 Solve all parts :
What is wind power plant? Define the types of windmill.
Explain the construction and working of a Janata Model Gobar Gas Plant.
Q.3 Solve both questions :
A fluid system undergoes a non-flow frictionless process following the pressure-volume
relation as $p = 5 / v + 1.5$, where $p$ is in bar and $v$ is in m$^3$. During
the process, the volume changes from 0.15 m$^3$ and the system rejects 45 kJ of heat.
Determine the—
(i) change in internal energy;
(ii) change in enthalpy.
1 kg of steam at 8 bar, entropy 6.55 kJ/kg-K, is heated reversibly at constant pressure until the temperature is 200 °C. Calculate the heat supplied and show on a $T-S$ diagram the area which represents the heat flow.
Q.4 Solve this question :
Explain boiler mountings and accessories. Sketch any two.
Enumerate the factors which should be considered while selecting a boiler.
Q.5 Solve both questions :
A 4-cylinder two-stroke cycle petrol engine develops 30 kW at 2500 r.p.m. The mean effective pressure on each piston is 8 bar and mechanical efficiency is 80%. Calculate the diameter and stroke of each cylinder of stroke to bore ratio 1.5. Also calculate the fuel consumption of the engine, if brake efficiency is 28%. The calorific value is in J/kg.
What are the two basic types of internal combustion engines? What are the fundamental differences between the two?
Q.6 Solve this question :
Describe the working principle of thermal power plant with a neat sketch.
Describe the working principle of nuclear power plant with a neat sketch.
Q.7 Solve both questions :
Differentiate clearly between open and closed air refrigeration systems.
Enumerate the main parts of the equipment in the air-conditioning cycle.
Q.8 Solve all parts :
Name various ores of iron and explain the process of manufacturing pig iron from them.
Compare the construction and working of blast furnace and cupola. Explain the method of operation of cupola.
Q.9 Solve this question :
Compare recrystallization in steel caused by an allotropic change and recrystallization due to cold working.
Draw iron-carbon equilibrium diagram and show their salient features.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option (any seven):
As differentials, heat and work would be described mathematically as
The first law of thermodynamics refers to conservation of
Heat transferred in constant pressure process is equal to
The heat energy released by the complete fusion of 1 kg of U$^{235}$ is equal to the heat energy obtained by burning of high grade coal of
The power developed inside the cylinder of an engine is called
Heat addition to water in a boiler takes place at
How many degrees the crankshaft rotates in one complete cycle of four-stroke engine?
The evaporator coil in the refrigerating chamber
The percentage of carbon in cast iron varies between
The ability of a material to resist deformation under the action of external load is called
Q.2 Solve both questions :
Distinguish between conventional and non-conventional sources of energy. Give suitable examples.
What are the advantages and disadvantages of liquid fuels over solid fuels?
Q.3 Solve both questions :
Define the following:
(i) Closed, open and isolated systems
(ii) Intensive and
extensive property
Air weighing 2.5 kg, occupying 0.8 m$^3$, had a temperature of 25 °C. It was then heated at constant volume until its temperature becomes 205 °C. How much heat was transferred to the air and what was its final pressure? [$C_v$ = 0.719 kJ/kg K, R = 0.287 kJ/kg K]
Q.4 Solve all parts :
What are the special features of good boilers?
Why are water-tube boilers more preferred for steam power plants?
Explain the working of economizer with suitable sketch.
Q.5 Solve all parts :
What are the advantages of steam turbine over steam engine?
Why is steam turbine compounded? Give reasons.
Differentiate between open-cycle gas turbine and closed-cycle gas turbine.
Q.6 Solve both questions :
Differentiate between SI engine and CI engine.
Derive an expression for air standard efficiency of Brayton cycle.
Q.7 Solve both questions :
Explain with a neat sketch the working of hydel power plant. What are the functions of surge tank and draft tube?
What are the functions of moderators and control rod in nuclear power plant?
Q.8 Solve both questions :
Define the following:
(i) Refrigeration effect
(ii) Tonne of refrigeration
(iii)
COP
Explain the working of vapour absorption system of refrigeration indicating all components.
Q.9 Solve both questions :
Explain the following properties of material:
(i) Ductility
(ii) Hardness
(iii)
Toughness
(iv) Resilience
Explain the heat treatment process of annealing. What are its advantages?
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Choose the correct option (any seven):
As differentials, heat and work would be described mathematically as
The first law of thermodynamics refers to conservation of
Heat transferred in constant pressure process is equal to
The heat energy released by the complete fusion of 1 kg of U$^{235}$ is equal to the heat energy obtained by burning of high grade coal of
The power developed inside the cylinder of an engine is called
Heat addition to water in a boiler takes place at
How many degrees the crankshaft rotates in one complete cycle of four-stroke engine?
The evaporator coil in the refrigerating chamber
The percentage of carbon in cast iron varies between
The ability of a material to resist deformation under the action of external load is called
Q.2 Solve both questions :
Distinguish between conventional and non-conventional sources of energy. Give suitable examples.
What are the advantages and disadvantages of liquid fuels over solid fuels?
Q.3 Solve both questions :
Define the following:
(i) Closed, open and isolated systems
(ii) Intensive and
extensive property
Air weighing 2.5 kg, occupying 0.8 m$^3$, had a temperature of 25 °C. It was then heated at constant volume until its temperature becomes 205 °C. How much heat was transferred to the air and what was its final pressure? [$C_v$ = 0.719 kJ/kg K, R = 0.287 kJ/kg K]
Q.4 Solve all parts :
What are the special features of good boilers?
Why are water-tube boilers more preferred for steam power plants?
Explain the working of economizer with suitable sketch.
Q.5 Solve all parts :
What are the advantages of steam turbine over steam engine?
Why is steam turbine compounded? Give reasons.
Differentiate between open-cycle gas turbine and closed-cycle gas turbine.
Q.6 Solve both questions :
Differentiate between SI engine and CI engine.
Derive an expression for air standard efficiency of Brayton cycle.
Q.7 Solve both questions :
Explain with a neat sketch the working of hydel power plant. What are the functions of surge tank and draft tube?
What are the functions of moderators and control rod in nuclear power plant?
Q.8 Solve both questions :
Define the following:
(i) Refrigeration effect
(ii) Tonne of refrigeration
(iii)
COP
Explain the working of vapour absorption system of refrigeration indicating all components.
Q.9 Solve both questions :
Explain the following properties of material:
(i) Ductility
(ii) Hardness
(iii)
Toughness
(iv) Resilience
Explain the heat treatment process of annealing. What are its advantages?
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
- Answer/Choose the correct option/Fill in the blank of the following (any seven):
Name the process by which a heavy nucleus is splitted into two light nuclei.
Which of the following is extensive property of a system?
Fire-tube boilers are restricted to a maximum pressure of ________.
Cooling water is not needed in
First law of thermodynamics deals with conservation of
In vapour compression refrigeration system, the abrupt reduction of pressure takes place in
Fuel injector is used in ________ engine.
Air refrigeration system works on
The steel used for making cutting tools is
Define resilience.
- Solve the following parts:
Discuss the merits and demerits of renewable and non-renewable sources of energy with suitable examples.
What are the methods of harnessing of solar energy? Explain the principle of wind mill.
- Solve the following parts:
Define open, closed and isolated systems. Classify each with example.
Differentiate among heat, work and internal energy.
0.2 m$^3$ of air at 4.0 bar and 150 $^\circ$C expands isentropically to a pressure of 1.0 bar. The gas is then heated at constant pressure till it attains its initial temperature. Determine the change of internal energy and work done.
- Solve the following parts:
What are the differences between fire-tube and water-tube boilers?
Name all the mountings and accessories of a steam boiler and describe, with neat sketch, the working of any one of each.
- Solve the following parts:
What is steam turbine? Explain the principle of operation of impulse turbine.
State the working principle of a closed cycle gas turbine. Why is it named as constant pressure turbine?
- Solve the following parts:
How are IC engines classified? Draw $p-V$ diagrams of Otto and diesel engine cycles.
With neat sketches, explain the working of a four-stroke diesel engine.
- Solve the following parts:
Describe with a neat sketch the construction and working of a nuclear power plant.
Describe the working principle of high head hydel power station.
- Solve the following parts:
Differentiate between the following: (i) Refrigeration and airconditioning (ii) Vapour compression and vapour absorption refrigeration system
With neat sketch, explain the working of a room air conditioner.
- Solve the following parts:
What is plain carbon steel? Give the classification of plain carbon steels and their important properties and uses.
Define the following terms: (i) Toughness (ii) Hardness (iii) Normalizing (iv) Casehardening
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Answer the following/Choose the correct option (any
seven):
Give two examples of primary sources of energy.
Zeroth law of thermodynamics forms the basis of ______ measurement.
Difference between the pressure of a fluid and the pressure of atmosphere is called as
Heat supplied to a system equals the work done in case of a non-flow process carried out
Which of the following fittings is a boiler mounting?
The number of valves in a single-cylinder two-stroke petrol engine is
How many degrees a crankshaft rotates in completing the cycle of two-stroke engine?
The condenser in which there is direct contact between the steam and the cooling fluid should be
1 ton of refrigeration effect is equal to
The ability of a material to resist wear is called
Q.2 Solve both questions :
Explain the merits and demerits of renewable and non-renewable sources of energy.
What is the origin of biomass energy? Give the main advantages and disadvantages of biomass energy.
Q.3 Solve both questions :
Differentiate between the following:
(i) Intensive and Extensive property
(ii) Point
and Path function
A mass of gas is compressed in a quasi-static process from 80 kPa, 0.1 m$^3$ to 0.4 MPa, 0.03 m$^3$. Assuming that the pressure and volume are related by $pv^n = $ constant, find the work done by the gas system.
Q.4 Solve both questions :
Classify the different types of boilers. Differentiate between fire-tube and water-tube boilers.
Classify mountings into safety fittings and control fittings. Explain with neat sketch any one of each.
Q.5 Solve both questions :
Derive an expression for air standard efficiency of Otto cycle.
Differentiate between two-stroke and four-stroke engines.
Q.6 Solve both questions :
With neat sketch, explain briefly the working principle of an impulse turbine.
Write the application of gas turbine. What are the advantages and disadvantages of gas turbine over IC engine?
Q.7 Solve both questions :
Why is steam condenser used in thermal power plant?
Describe with neat sketch the construction and working of a nuclear power plant.
Q.8 Solve both questions :
Explain Bell-Coleman air refrigeration cycle.
Explain with neat sketch, the working of vapour compression refrigeration system.
Q.9 Solve both questions :
What is plain carbon steel? Give classification of plain carbon steels with their important properties.
What are the objectives of heat treatment? Explain the heat treatment process by tempering.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
Q.1 Answer the following/Choose the correct option (any
seven):
Give two examples of primary sources of energy.
Zeroth law of thermodynamics forms the basis of ______ measurement.
Difference between the pressure of a fluid and the pressure of atmosphere is called as
Heat supplied to a system equals the work done in case of a non-flow process carried out
Which of the following fittings is a boiler mounting?
The number of valves in a single-cylinder two-stroke petrol engine is
How many degrees a crankshaft rotates in completing the cycle of two-stroke engine?
The condenser in which there is direct contact between the steam and the cooling fluid should be
1 ton of refrigeration effect is equal to
The ability of a material to resist wear is called
Q.2 Solve both questions :
Explain the merits and demerits of renewable and non-renewable sources of energy.
What is the origin of biomass energy? Give the main advantages and disadvantages of biomass energy.
Q.3 Solve both questions :
Differentiate between the following:
(i) Intensive and Extensive property
(ii) Point
and Path function
A mass of gas is compressed in a quasi-static process from 80 kPa, 0.1 m$^3$ to 0.4 MPa, 0.03 m$^3$. Assuming that the pressure and volume are related by $pv^n = $ constant, find the work done by the gas system.
Q.4 Solve both questions :
Classify the different types of boilers. Differentiate between fire-tube and water-tube boilers.
Classify mountings into safety fittings and control fittings. Explain with neat sketch any one of each.
Q.5 Solve both questions :
Derive an expression for air standard efficiency of Otto cycle.
Differentiate between two-stroke and four-stroke engines.
Q.6 Solve both questions :
With neat sketch, explain briefly the working principle of an impulse turbine.
Write the application of gas turbine. What are the advantages and disadvantages of gas turbine over IC engine?
Q.7 Solve both questions :
Why is steam condenser used in thermal power plant?
Describe with neat sketch the construction and working of a nuclear power plant.
Q.8 Solve both questions :
Explain Bell-Coleman air refrigeration cycle.
Explain with neat sketch, the working of vapour compression refrigeration system.
Q.9 Solve both questions :
What is plain carbon steel? Give classification of plain carbon steels with their important properties.
What are the objectives of heat treatment? Explain the heat treatment process by tempering.
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
- Fill in the blank/Choose the correct option of the following (any seven):
The primary fuel used in nuclear power plant is ________.
Zeroth law of thermodynamics forms the basis of ________ measurement.
The percentage by weight of oxygen in atmospheric air is
An adiabatic system can exchange energy in the form of ________ only.
During refrigeration cycle based on vapour compression system, the heat rejected by the refrigerant in
The fluids used in the Electrolux refrigerator are ammonia, water and ________.
Which of the following is fitted on a boiler to improve the boiler efficiency?
Steam power plant works on ________ cycle.
________ is used to mix air and fuel in a petrol engine.
Aluminium-copper alloy is called ________.
- Solve the following parts:
What is the status of nonconventional energy sources in India, and what are their future prospects?
What is the origin of biomass energy? What is its global potential? Give its advantages and disadvantages.
- Solve the following parts:
Differentiate between the following: (i) Heat and work (ii) Point function and path function (iii) Intensive and extensive properties
Air initially at a pressure of 75 kPa, at a temperature of 1000 K and occupying a volume of 0.12 m$^3$ is compressed isothermally until the volume is halved and subsequently it undergoes further compression at constant pressure till the volume is halved again. Calculate the work done.
- Solve the following parts:
Explain the principles of fire-tube and water-tube boilers.
With neat sketch, describe the function of fusible plug and water-level indicator in fire-tube boiler.
- Solve the following parts:
What are the advantages of steam turbines over other prime movers?
What are compoundings of an impulse turbine?
What are the advantages of gas turbines over I.C. engines?
- Solve the following parts:
Differentiate between two-stroke and four-stroke engines.
Explain Otto cycle and derive an expression for efficiency of Otto cycle.
- Solve the following parts:
What are the role of condenser in a thermal power plant?
With neat sketch, explain the working of hydel power plant. Mention some hydel plants situated in India.
- Solve the following parts:
Define the following terms: (i) Refrigeration (ii) Air conditioning (iii) Unit of refrigeration
Explain with neat sketch, the construction and working of vapour compression refrigeration system.
- Solve the following parts:
What are alloy steels? Why is alloying done? Give some important alloying elements with their effects on steel.
What are annealing and tempering? How do they effect on the properties of a substance?
Instructions:
- The marks are indicated in the right-hand margin.
- There are EIGHT questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
- Answer/Choose the correct option (any seven):
What is the main constituent of biogas?
First law of thermodynamics deals with conservation of
The process of generation of steam in the pressure cooker is an example of
The fusible plug is placed
In a four-stroke diesel engine, during suction stroke
The absorption refrigeration cycle employs the following device for raising pressure of refrigerant.
The cooling capacity of a refrigerator is expressed in
Steam power plant works on
The percentage of carbon in cast iron usually varies between
During normalizing operation, the steel castings are cooled in
- Solve the following parts:
What are the salient features of non-conventional energy sources?
What are the methods of harnessing of solar energy? Explain the working of a solar flat collector.
- Solve the following:
Define 'boiler'. Draw a neat labeled diagram of a Cochran boiler showing placement of the different mountings on it and also write the function of each mounting.
- Solve the following parts:
How are internal combustion engines classified?
Explain the working of a four-stroke diesel engine with suitable sketches.
- Solve the following parts:
What is compounding of an impulse turbine?
State the principle of working of an open-cycle gas turbine.
What are the advantages of gas turbines over steam turbines?
- Solve the following parts:
Define the following: (i) COP (ii) Unit of refrigeration (iii) Air conditioning
Explain with neat sketch the principle and construction of vapour absorption refrigeration system.
- Solve the following parts:
Describe with neat sketch the working principle of high-head hydel power plant. What are its advantages over other power plants?
Explain the use of cooling tower in thermal power plant.
- Solve the following parts:
Define the following mechanical properties: (i) Strength (ii) Hardness (iii) Ductility (iv) Toughness
Explain various case-hardening processes of steel.
Instructions:
- All questions carry equal marks.
- There are NINE questions in this paper.
- Attempt any FIVE questions.
- Question No. 1 is compulsory.
- Fill in the blanks/Choose the correct answer (any seven):
Main demerits of non-conventional energy sources are ________.
If temperature in degree Celsius is 37, then the equivalent temperature in Fahrenheit will be
Which of the following sets has all the properties as point functions?
Change in internal energy in a reversible process occurring in closed system will be equal to heat transferred, if the process occurs at constant
________ and ________ are the examples of fire-tube boilers.
The compression ratio of a petrol engine and a diesel engine lies in the range of ________ to ________ and ________ to ________ respectively.
The evaporator coil in the refrigerating system
The life of hydel power plant is ________ years and that of thermal power plant is ________ years.
The function of cooling tower in thermal power plant is to reduce
The ability of a material to absorb energy up to elastic limit is called ________ and up to rupture ________.
- Solve the following parts:
What is meant by renewable and non-renewable energy sources? Give suitable examples of each.
What is the origin of biomass energy? What are the main advantages and disadvantages of it?
What are the most favourable sites for installing wind turbines?
- Solve the following parts:
Define the following terms: (i) Thermodynamic equilibrium (ii) Quasi-static process (iii) Internal energy
0.2 kg of air is compressed by following the process of isothermal from 40 kPa 30$^\circ$C to 0.2 MPa and is expanded at constant pressure to the original volume. Sketch the process on $p-v$ and $T-S$ plots. Compute net work to be obtained and also the heat transfer.
- Solve the following parts:
Define boiler according to IBR.
Classify mountings into safety fittings and control fittings.
Describe the functions of chimney in a boiler.
- Solve the following parts:
What are the advantages of steam turbine over reciprocating engines?
Write the functions of the following: (i) Nozzle (ii) Moving blade (iii) Guide blades in steam turbine.
Why is gas turbine used in aviation?
- Solve the following parts:
Draw the diesel cycle on $p-v$ and $T-S$ coordinates and explain its functioning.
Derive an expression for the air standard efficiency of a Brayton cycle in terms of pressure ratio.
- Solve the following parts:
Draw the layout of simple thermal power plant and explain the function of its various parts.
What are the advantages and disadvantages of nuclear power plant?
- Solve the following parts:
Differentiate between vapour compression refrigeration and vapour absorption refrigeration.
With a neat sketch, explain the working of a room air conditioner.
- Solve the following parts:
What are different classes of cast iron? What are their properties and applications?
What is tempering? What are its objectives?