This document contains model examination questions for university students across 5 modules. For each module, there are multiple choice questions worth 3 marks each (Part A) and short answer and analytic questions worth 5 and 12 marks respectively (Part B and Part C). The questions cover topics in thermodynamics, internal combustion engines, power transmission systems, hydroelectric power plants and manufacturing processes.

1. Model university examination questions
Part A (5 3 marks) One or two sentence answers
Module I
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1. What is the difference between extensive and intensive property?
2. Define quasi-stat ic process.
3. What is Boyle's law?
4. What is a thermodynamic system?
5. Define adiabat ic process.
6. What is internal energy?
7. Explain system and cont rol volumes
8. Define specific heat . (MGU-May- 2012)
9. State laws of thermodynamics. (MGU-May- 2013)
10. Define the terms (i) state ; (ii) property ; and (iii) cycle. (MGU-May- 2014)
Module II
1. What is the function of carburetor?
2. Explain the functions of injector.
3. List the components of a VCR system.
4. Explain the functions of lubricating systems in IC engines
5. What are the functions of piston crown in 2-S petrol engine '?
6. Explain the term ton of refrigeration.
7. Define compression ratio of an IC Engine.
8. What are the funct ions of injector in internal combust ion engines? (MGU-May- 2012)
9. Discuss the classificat ion of IC Engines based on fuel used and cooling system. (MGU-May- 2013)
10. What is phychromet ry ? (MGU-May- 2014)
Module III
1. What is meant by slip in belt drives?
2. Give a classificat ion of gears.
3. Discuss the applicat ions of rope drive.
4. What are the different types of chains in chain drive?
5. Write the equat ion for rat io of tensions and slip in belt drive.
6. What is meant by crowning of pulley?
7. Explain the types of belt drives.
8. State the application of gear drives. (MGU-May- 2012)
9. What is meant by velocity ratio and slip in a belt drive? (MGU-May- 2013)
10. Name different methods of power transmission. (MGU-May- 2014)
Module IV
1. What is meant by velocity rat io in gear wheels?
2. What is meant by compounding of turbines?
3. What is meant by surge tank?
4. List some of the non-convent ional energy sources.
5. What are the pollutants from Nuclear power plant?
6. Explain the use of draft tube.
7. Define specific speed of a turbine. (MGU-May- 2012)
8. Briefly explain the working of centrifugal pump. (MGU-May- 2013)
9. Define the term slip of a reciprocating pump. (MGU-May- 2014)
Module V
1. What are the funct ions of runner and riser in moulds?
2. What are the funct ions of the head stock of a lathe?
3. What is the use of chuck in lathe? How DNC is different from CNC?
4. What is the use of flux in welding?
5. What are the ingredients of molding materials?
6. Explain the types of milling.
7. What are the applications of drilling machines? (MGU-May- 2012)
8. List the machining operat ions that are performed on a lathe. (MGU-May- 2013)
9. Name different types of pat terns used in moulding. (MGU-May- 2014)

2. Module-I - PART B (5  5 marks) Short Answers
1. Different iate closed system and open system. Give examples.
2. Define and explain specific heat .
3. Define a quasi-stat ic process and state its salient characterist ics.
4. What is meant by property of a system? What are its classificat ions?
5. Different iate closed system and open system. Give examples.
6. Explain the basic laws of heat t ransfer.
7. Explain intensive and extensive properties of thermodynamic systems. (MGU-May- 2012)
8. Explain with neat sketches the Carnot cycle. (MGU-May- 2013)
9. State and explain First Law of Thermodynamics. (MGU-May- 2014)
Module-II- PART B (5  5 marks) Short Answers
1. Explain the funct ions of lubricat ing systems in IC engines
2. What are the funct ions of piston crown in two st roke pet rol engine?
3. What are the advantages and disadvantages of 2-St roke cycle engines?
4. Explain the working of a simple carburetor.
5. What is the funct ion of the spark plug?
6. Give an account of common refrigerants.
7. With a neat diagram explain the compression ignition system in IC engines. (MGU-May- 2012)
8. Compare the transmission of power through belt and chain. (MGU-May- 2013)
9. What are the desired properties of an ideal refrigerant? (MGU-May- 2014)
Module-III- PART B (5  5 marks) Short Answers
1. Explain various belt drives.
2. List the applicat ions of different t ransmission drives.
3. What are the different types of gears? What is a reverted gear t rain?
4. What is slip in belt drives? What is its effect on velocity rat io?
5. What are the advantages and disadvantages of belt drives?
6. Explain what you mean by slip in a belt drive.
7. Explain the types of gear t rains.
8. Explain power transmission by rope and chain drives. (MGU-May- 2012)
9. List the advantages and disadvantages of flat belt drives. (MGU-May- 2014)
Module-IV- PART B (5  5 marks) Analytic/Short Answers
1. Discuss the select ion of hydraulic turbines.
2. How do you select a hydraulic turbine based on head available?
3. What is non-convent ional energy? List some of the non-convent ional energy sources.
4. Define specific speed of a turbine.
5. What is meant by surge tank? What is its funct ion in hydroelect ric power plants?
6. Explain the components of a nuclear reactor. (MGU-May- 2012)
7. Dist inguish between impulse and react ion turbines used in hydroelect ric power plants. (MGU-May- 2013)
8. What is priming? Why is it necessary? (MGU-May- 2014)
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Module-V- PART B (5 5 marks) Analytic/Short Answers
1. What is the reason for providing pat tern allowances? Explain the important pat tern allowances.
2. What are the machining operat ions that can be performed on a milling machine?
3. Give a very brief account of the funct ions of the head stock and tail stock of a lathe.
4. Describe the working and use of grinding machine.
5. What are the advantages of gas welding over arc welding?
6. What are the propert ies that molding sand should possess to produce a good cast ing?
7. Explain different types of rolling process.
8. Describe the working and uses of grinding machine. (MGU-May- 2012)
9. Explain the principle of refrigerat ion with neat diagrams. (MGU-May- 2013)
10. State the advantages of gas welding. (MGU-May- 2014)
Module-I - PART C (5  12 marks)
1. A Carnot heat engine operates between a source at 1000 K and a sink at 300 K. If the engine is supplied with a heat at a rate of 800
kJ/min, determine the thermal efficiency and the power output of the engine.
2. Derive an expression for the work done and heat t ransfer during a polyt ropic process.
3. What is thermodynamic process? In an isothermal process 8 m3 of air at a pressure of 2 bar is compressed to a
pressure of 10 bar. Calculate the amount of work done on air.
4. A gas expands in a cylinder according to the relation pV1.3 = constant from an initial state of 0.3 m3 and 1000 kPa to
a final state of 101 kPa. Calculate the work done on the piston by the gas pressure.
5. Air at 20 kPa and 20 C is expanded isothermally to 15 kPa. Calculate the change in internal energy and work done. If it is expanded
adiabat ically, find the corresponding values. (MGU-May-2013)
6. State the Kelvin Plank's statement and Clausius statement of second law of thermodynamics and prove its equivalence. (MGU-May -
2012/May-2014)
7. Derive an expression for the air-standard efficiency of Ot to cycle. (MGU-May-2014)

3. Module-II- PART C (5  12 marks)
1. With the help of a neat sketch, explain the funct ioning of a carburetor.
2. Describe the working of four st roke pet rol engine.
3. With neat sketches explain summer air condit ioning and winter air condit ioning systems.
4. Explain the working principle of a four st roke diesel engine with neat sketch.
5. With a neat sketch, explain the working of a two st roke SI engine.
6. Explain the working of a vapour compression system with the help of a neat sketch.
7. Define air conditioning and discuss different systems of air conditioning. (MGU-May-2013)
8. Compare and contrast four st roke cycle engines with two stroke cycle engines. (MGU-May – 2014/May-2013)
9. Explain the working of a vapour absorption refrigerator with a suit able sketch. (MGU-May -2014)
Module-III - PART C (5  12 marks)
1. A horizontal shaft running at 200 rpm.is to drive a parallel shaft at 300 rpm. The pulley on the driving shaft is 60 cm diameter. If the
belt is 6 cm, thick, find the diameter of driven pulley: Neglecting belt thickness , Taking belt thickness into account , Assuming in the
lat ter case a slip of 4%.
2. A leather belt 10mm thick transmits 40kW from a pulley 120cm in dia. running at 240rpm. The angle of lap is 160. The coefficient of
frict ion is 0.28. What width of the belt will be required if the st ress in the belt is limited to 2MPa?
3. Discuss the merits and demerits of belt , rope and chain drives for t ransmission of power.
4. Sketch a spur gear and mark the salient circles.
5. Derive a relat ion between the tension in the belt on the tight and slack sides and show that it is independent of the size of the pulley.
(MGU-May-2012)
6. Derive an expression for calculat ing the length of an open belt drive. (MGU-May-2013)
7. Find the horse power t ransmitted by a rope drive from the following data. Angle of contact = 180  , pulley groove angle = 60,
coefficient of friction = 0.2, weight of rope per unit length = 4 N/m, permissible tension = 1200 N and velocity of the rope is 18 m/s.
(MGU-May-2013)
8. Derive the expression for calculat ing the length of belt for a cross-belt drive. (MGU-May-2014)
9. Draw the arrangement of a compound gear t rain. What are their advantages compared to simple gear trains? Obtain the equat ion for its
velocity rat io. (MGU-May-2014)
Module-IV- PART C (5  12 marks)
1. Describe the working of an impulse type steam turbine.
2. Explain the method of compounding in steam turbines.
3. How is the type of turbine selected in a certain hydro-plant?
4. With the help of sketches, explain the working of react ion turbines.
5. Draw a neat sketch of diesel power plant. Label the important parts and explain their functions.
6. Explain any three types of non-conventional energy sources. Describe how this energy can be harnessed for commercial applicat ions.
(MGU-May-2012)
7. Sketch the general layout of a thermal power plant . (MGU-May-2013)
8. Explain different types of water turbines. (MGU-May-2013)
9. Sketch schematically the arrangement of a diesel power plant for elect ric power generat ion and explain the funct ions of its main
components. (MGU-May- 2014)
10. Sketch and explain the working of a low head react ion turbine. (MGU-May-2014)
Module-V- PART C (5 12 marks)
1. Describe the forging operat ions.
2. Explain the following: slab milling, face milling, form milling, end milling, T -slot milling.
3. Sketch and explain the various methods of surface grinding.
4. With the help of a neat sketch explain the arc welding process.
5. Describe the working and the necessity of a lathe in an automobile workshop. (MGU-May-2012)
6. With the help of a neat sketch, explain a drilling machine. (MGU-May-2013)
7. Explain the features of different types of welding processes. (MGU-May-2013)
8. Sketch a milling machine and indicate the important components in it . (MGU-May- 2014)
9. Describe with a sketch the principle of gas welding process. Draw the three types of gas flames, stating their applications. (MGU-May-
2014)
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