Questions on IC Engines with answers

Jan 13 • Notes • 51163 Views • 58 Comments on Questions on IC Engines with answers

An automobile engineer or a mechanical engineer is required to go through the depths of the IC engine portion as they might have to answer a numerous questions be it in the interview or in academics. So here is a set of some frequently asked questions on IC engines with answers

1.WHAT IS IC ENGINE?
ANS. The internal combustion engine converts chemical energy into useful mechanical energy by burning fuel. Chemical energy is released when the fuel-air mixture is ignited by the spark in the combustion chamber. The gas produced in this reaction rapidly expands forcing the piston down the cylinder on the power stroke. 
2. WHAT IS 2-STROKE IC ENGINE?
ANS. 

AN 2-STROKE engine is designed by DUGLAD CLERK in 1880, the suction,compression,expansion and exhaust takes place during 2-stroke of piston.Their is 1 stroke after every revolution of the crank shift.

Questions on IC engine

2-Stroke IC Engine

Animation of two-stroke engine in operation, with a tuned pipe exhaust.

  3. WHAT IS 4-STROKE ENGINE?

ANS. 

A 4-stroke engine is an internal combustion engine in which  the piston completes four separate strokes— intake, compression, power, and exhaust— during two separate revolutions of the engine’s crankshaft, and one single thermodynamic cycle.It uses natural gas,manufactured gas.
FIGURE OF 4-STROKE
4-Stroke IC Engine
4. WHAT IS THE DIFFERENCE BETWEEN 2-STROKE AND 4-STROKE IC ENGINE?
ANS.  Difference between these two IC engine is given below:
  1. 2-stroke engine fires 1 time in each revolution whereas a 4-stroke fires 1 time in 2 revolutions.
  2. 2-stroke is simpler and lighter, but less versatile.
  3. In place of valves in 4-stroke engines ,ports are present in 2-stroke engines,stroke has no valve, the piston act like a valve to control the flow of fuel..
  4. light duty engines are 2 stroke used commonly, for heavy duty 4 stroke are used.

5. NAME THE MAIN STEPS INVOLVE IN 4-STROKE IC ENGINE?

ANS.Following are the steps involved in this are:

The steps involved here are:

  1. Intake stroke: Air and vaporized fuel are drawn in.
  2. Compression stroke: Fuel vapor and air are compressed and ignited.
  3. Combustion stroke: Fuel combusts and piston is pushed downwards.
  4. Exhaust stroke: Exhaust is driven out. During the 1st, 2nd, and 4th stroke the piston is relying on power and the momentum generated by the other pistons.
Four Stroke Cycle

Four Stroke Cycle

Four-stroke cycle (or Otto cycle)
1. Intake
2. Compression
3. Power
4. Exhaust

6.WHAT ARE THE APPLICATIONS OF IC ENGINE?
ANS. Following are the ares in which IC engines are used :
  • automobiles:  such as helicopters, big barges and ships and jet crafts utilize excess power which is supplied in the form of gas turbines.
  • aircraft vehicles,
  • motorbikes,
  • boats and other  locomotives.
  • major power plants and similar naval applications,
  • Battery operated electric vehicles

7.WHAT ARE THE ADVANTAGES OF LUBRICATION IN IC ENGINE?

ANS  .Following are the advantages of lubrication in IC engine:

  • It reduces the wear and tear of the moving parts.
  • It damps down the vibration of the engine.
  • It cleans the moving parts.
  • It makes the piston gas tight.

8. NAME THE COMMON LAYOUT OF THE IC ENGINE?

ANS. Following are the common layouts of the IC engine:

  • Reciprocating:
  1. Two-stroke engine
  2. Four-stroke engine (Otto cycle)
  3. Six-stroke engine
  4. Diesel engine
  5. Atkinson cycle
  6. Miller cycle
  • Rotary:
  1. Wankel engine
  • Continuous combustion:

Gas turbine

  1. Jet engine

9. NAME THE FUEL USED BY IC ENGINES?

ANS. Following are the types of fuels used for IC engines:

  1. Petroleum:  Petroleum spirit ,Petroleum diesel,liquified petroleum gas,Compressed natural gas,Jet fuel ,Residual fuel.
  2. Coal: methanol ,Gasoline ,Diesel fuel.
  3. Biofuels and vegoils:  Peanut oil and other vegoils , Biobutano, biodiesel ,Dimethyl Ether, biogas,hydrogen

10.WHAT ARE THE MEASURES OF IC ENGINE PERFORMANCE?

ANS.   Engine types vary greatly in a number of different ways and following are it’s measures of performance:

  1. energy efficiency
  2. fuel/propellant consumption
  3. power-to-weight ratio
  4. thrust to weight ratio
  5. Torque curves (for shaft engines) thrust lapse (jet engines)
  6. Compression ratio for piston engines, overall pressure ratio for jet engines and gas turbines

We hope that set of questions on IC engine provided here have helped you in some way. Please give your valuable feedback regarding this post so that we can come up with more and more helpful posts like this.

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Fuel and Combustion

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Internal Combustion Engine Fuels

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58 Responses to Questions on IC Engines with answers

  1. gebremariam says:

    related qeustions ot ic engine

  2. Anonymous says:
  3. ashenafi negasi says:

    ic engine

  4. ashenafi negasi says:
  5. dessie mulualem says:

    ic engine

  6. dessie mulualem says:
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  9. robertson craies says:

    internal cobustion engine driver

  10. Manu Dixit says:

    I am a mechanical enginner fresher .After 2 days i have an interview in everest industries limited so can i please get the important questions that are to be asked in that company.

  11. Anonymous says:
  12. Rahul says:

    BSC

  13. Rahul says:
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  16. amit says:

    Enter your any educational query or doubtDiplomq

  17. amit says:

    Enter your any educational query or doubtDiplomq

  18. Akshay Nighot says:
  19. Rahul Prajapati says:

    12 Pass

  20. Sumit Shukla says:
  21. Anonymous says:
  22. virender Kumar says:

    Diesel engine technical questions

  23. Obsinan Girma says:

    Striling process cycle

  24. Bhuban Debbarma says:

    IC engines

  25. Bhuban Debbarma says:
  26. Anonymous says:
  27. Avijit Sarkar says:

    Automobile engineering 2nd year

  28. Aftab ansari says:

    B a

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  31. Johnson Jacob says:

    Mendelian flaws in this law of independent assortment

  32. Yayra says:

    Engines

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    mechanical engnering

  34. praveen kumar says:

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  36. praveen kumar says:

    i didnt have any doubt

  37. hari om says:

    Questions papers

  38. hari om says:

    Questions papers

  39. hari om says:
  40. Shubham Kohale says:

    I.C. Engine Interviw Questions and answer

  41. Anonymous says:
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    if a refregirator is used for cooling purpose in winter so that atmosphere becomes

  43. wasik ahemmed khan says:

    sir afer btech mechanical any short term course to get into me job

  44. Anupam kumar singh says:

    basic all types of questions related to automobile

  45. Devang Darode says:

    How should one prepare for the written test and interview for an automobile company ?

    I am expecting a different answer from “Studying basic four important subjects.”

  46. Anonymous says:

    Six stock Diesel engine, for interview quaton and answer

  47. Daro VAN says:

    Internal combustion Engine and Refrigeration system

  48. durgesh mishra says:

    which material is best suited to transfer the heat through convection?

  49. Abid Ali says:

    How to get enough chances of selection as a mechanical engineer.

  50. Vipin Sahu says:

    This article contains information regarding IC engines with its complete working, diagrams and all with important its concepts. So must review this article it helps you a lot in gaining information.

  51. aratrika sengupta says:

    The term internal combustion engine usually refers to an engine in which combustion is intermittent, such as the more familiar four-stroke and two-stroke piston engines, along with variants, such as the six-stroke piston engine. This small research putting up the summary about IC ENGINES would really be aiding for mechanical and electrical students mostly.

  52. Ronak Garg says:

    Good one for amateurs.
    I wanna ask a question-“Do engine capacity directly depends on its power?”

  53. Arpita Sardar says:

    This article is little bit important for those who are interested in electronics or instrumentation related feild.

  54. Shaheen Khan says:

    Questions on IC engine is available here. Here 10 important questions are covered here and bit of informative.

  55. Divya Acharya says:

    if you want to make your career in the field of electronics or in any instrumentation related field then this article will help you out in making your career bright.

  56. Divya Acharya says:

    if you want to make your career in the field of electronics then this article will help you out.

    • Shubham chugh says:

      are ye to automobile engine ka topic hai macanical walo ke kam aye ga electonics walo ke nahi

  57. Abhinav Gupta says:

    very nice effort.quite informative questions. one thing to correct that piston is moved by its own momentum not by momentum of other pistons.

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