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Internal Combustion Engines MCQ

1. What are vanes used for?

To create a vacuum

To pump fluid

To deflect the flow of a fluid, gas, or liquid

To compress gas

Answer

Correct Answer: To deflect the flow of a fluid, gas, or liquid

Note: This Question is unanswered, help us to find answer for this one

2. How many strokes are required to complete one cycle in a two-stroke engine?

Three

Two

One

Four

Answer

Correct Answer: Two

Note: This Question is unanswered, help us to find answer for this one

3. What is a trammel?

A pointed metal instrument for puncturing holes

A device for measuring

A tool for straightening clothes

A metal rod having pointed ends, used to mark off a span equal to its length

Answer

Correct Answer: A metal rod having pointed ends, used to mark off a span equal to its length

Note: This Question is unanswered, help us to find answer for this one

4. What is torsion?

A type of force.

The study of the dynamics of rotating bodies.

The deformation of a body caused by a force.

The deformation of a body caused by a torque or twisting effort.

Answer

Correct Answer: The deformation of a body caused by a torque or twisting effort.

Note: This Question is unanswered, help us to find answer for this one

5. Torque is the product of what two factors?

Distance

Time

Force multiplied by the arm

Mass x velocity

Answer

Correct Answer: Force multiplied by the arm

Note: This Question is unanswered, help us to find answer for this one

6. What is the position of the crank when the piston is in its farthest position from the crankshaft?

Top dead center

Bottom dead center

Center

Dead center

Answer

Correct Answer: Top dead center

Note: This Question is unanswered, help us to find answer for this one

7. What does tolerance refer to?

The amount of variation in dimensions

An allowable variation in dimensions

A specific measurement for dimensions

The ability or willingness to tolerate something, in this case dimensions

Answer

Correct Answer: An allowable variation in dimensions

Note: This Question is unanswered, help us to find answer for this one

8. What are gears keyed to the crankshaft and camshaft called?

Idler gears

Synchronizing gears

Starter gears

Timing gears

Answer

Correct Answer: Timing gears

Note: This Question is unanswered, help us to find answer for this one

9. What is the timing chain used for?

To connect the crankshaft and camshaft

Topowers the engine

To connect the wheels

To measure time

Answer

Correct Answer: To connect the crankshaft and camshaft

Note: This Question is unanswered, help us to find answer for this one

10. What is the angle made by the crank with its top or bottom dead-center position called?

Ignition

Fuel mixture

Compression

Timing

Answer

Correct Answer: Timing

Note: This Question is unanswered, help us to find answer for this one

11. What is the function of a thumbscrew?

Used to measure things

Used to make things

Used to fasten two objects together

Used to turn things

Answer

Correct Answer: Used to fasten two objects together

Note: This Question is unanswered, help us to find answer for this one

12. What is an axial force?

A force that acts along the circumference of a shaft.

A force that acts along the axis of a shaft.

A force that tends to cause a shaft to move axially.

A force that tends to cause a shaft to rotate

Answer

Correct Answer: A force that acts along the axis of a shaft.

Note: This Question is unanswered, help us to find answer for this one

13. What is the Throw of crankshaft?

The distance between theJournal and the crankpins

The stroke of the engine.

The distance between the center of the crankpins and the center of the journals of the crankshaft.

The distance between the crankpins and the stroke of the engine

Answer

Correct Answer: The distance between the center of the crankpins and the center of the journals of the crankshaft.

Note: This Question is unanswered, help us to find answer for this one

14. What is a thermostat?

A mechanism to convert the expansion of a heated metal or fluid into movement

A device used to control electric circuits

A device used to control small valves

A device used to measure temperature

Answer

Correct Answer: A mechanism to convert the expansion of a heated metal or fluid into movement

Note: This Question is unanswered, help us to find answer for this one

15. What is the science of changing heat into mechanical work called?

Science

Biology

Thermodynamics

Chemistry

Answer

Correct Answer: Thermodynamics

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16. What is a thermocouple?

A device used to measure the temperature of an object

A device used to measure the thermal conductivity of an object

A device used to measure heat

Two strips or wires of dissimilar metals joined at one end used to measure temperature differences.

Answer

Correct Answer: Two strips or wires of dissimilar metals joined at one end used to measure temperature differences.

Note: This Question is unanswered, help us to find answer for this one

17. What is the accepted range of thermal efficiency?

70-80%

5-10%

20-40%

50-60%

Answer

Correct Answer: 20-40%

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18. What is the percentage of the total chemical energy in the fuel consumed that is converted into useful work?

Energy not converted to work

Energy unavailable to do work

Thermal efficiency

Energy lost to the environment

Answer

Correct Answer: Thermal efficiency

Note: This Question is unanswered, help us to find answer for this one

19. What is Temperature?

A unit of measurement

The process of heating

The intensity or degree of heat.

The state of being hot

Answer

Correct Answer: The intensity or degree of heat.

Note: This Question is unanswered, help us to find answer for this one

20. What is a template?

A wheeled support

A pattern used as a guide for shaping something.

A cover for a machine

A manual process

Answer

Correct Answer: A pattern used as a guide for shaping something.

Note: This Question is unanswered, help us to find answer for this one

21. What is the tappet?

The cam

The valve

The part of the valve-actuating mechanism in contact with the cam

The cam follower

Answer

Correct Answer: The part of the valve-actuating mechanism in contact with the cam

Note: This Question is unanswered, help us to find answer for this one

22. What is the tangential force?

The component of the force applied to the object acting at a right angle to the ground.

The component of the force applied to the object acting at a right angle to the force.

The component of the force applied to the wheel acting at a right angle to the ground.

The component of the force applied to the piston acting at a right angle to the crank arm.

Answer

Correct Answer: The component of the force applied to the piston acting at a right angle to the crank arm.

Note: This Question is unanswered, help us to find answer for this one

23. What does it mean when a line is tangential?

Being parallel to another line.

Going in the same direction.

Meeting at a right angle.

Having the characteristics of a tangent.

Answer

Correct Answer: Having the characteristics of a tangent.

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24. What does a tachometer measure?

Displacement

Torque

Instantaneous rotary speed of a shaft

Acceleration

Answer

Correct Answer: Instantaneous rotary speed of a shaft

Note: This Question is unanswered, help us to find answer for this one

25. What does the word "synchronous" mean?

Present

Past

Occurring at the same time or in phase.

Future

Answer

Correct Answer: Occurring at the same time or in phase.

Note: This Question is unanswered, help us to find answer for this one

26. What is a semidiesel engine?

A type of jet engine

An engine that only runs on gasoline

An engine that can run on either gasoline or diesel fuel

An engine that only runs on diesel fuel

Answer

Correct Answer: An engine that can run on either gasoline or diesel fuel

Note: This Question is unanswered, help us to find answer for this one

27. What is supercharging?

Supplying of combustion air to an engine at higher than atmospheric pressure

Adding a turbocharger to the engine

Increasing the compression ratio

Allowing more fuel and air mixture into the cylinders

Answer

Correct Answer: Supplying of combustion air to an engine at higher than atmospheric pressure

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28. What is the name for the stroke of the piston during which a fresh charge is forced into the space vacated by the piston?

Power stroke

Suction stroke

Exhaust stroke

Compression stroke

Answer

Correct Answer: Suction stroke

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29. What is the distance a piston travels up or down inside the cylinder called?

Slant

Stroke

Incline

Answer

Correct Answer: Stroke

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30. What does the term "stability" refer to in the context of lubricating oils?

The ability of a liquid to maintain its shape.

The ability of a gas to maintain its shape.

The ability of lubricating oil to withstand physical change under severe operating conditions.

The ability of a solid to maintain its shape.

Answer

Correct Answer: The ability of lubricating oil to withstand physical change under severe operating conditions.

Note: This Question is unanswered, help us to find answer for this one

31. What is a coiled piece of steel wire called?

Pulley

Escalator

Rotating door

Spring

Answer

Correct Answer: Spring

Note: This Question is unanswered, help us to find answer for this one

32. What is the name of the device that controls the amount of fuel that enters the engine?

Fuel pump

Fuel injector

Carburetor

Spray valve

Answer

Correct Answer: Fuel injector

Note: This Question is unanswered, help us to find answer for this one

33. What is meant by "speed droop?"

The difference in speed between an airplane at takeoff and its cruising speed

The difference in speed between no-load and full-load engine speed.

A car's speedometer reading minus the car's actual speed

The difference in speed between loaded and unloaded trains

Answer

Correct Answer: The difference in speed between no-load and full-load engine speed.

Note: This Question is unanswered, help us to find answer for this one

34. The amount of heat needed to raise the temperature of one pound of the substance one degree Fahrenheit is called what?

Specific heat

Heat of vaporization

Heat of fusion

Latent heat

Answer

Correct Answer: Specific heat

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35. What is the weight of a liquid or solid compared with the weight of an equal volume of water at 60 F called?

Volume.

Density.

Mass.

Specific gravity.

Answer

Correct Answer: Specific gravity.

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36. What is the unit of measurement for Specific fuel consumption?

Lb. per blip or lb. per shp.

Mpg

Km/L

L/100km

Answer

Correct Answer: Lb. per blip or lb. per shp.

Note: This Question is unanswered, help us to find answer for this one

37. What is the meaning of "Solid injection"?

A type of injection where a liquid is injected into a solid

A type of injection where a solid is injected into a liquid

A type of injection where a solid is injected into the body

A rather misleading term applied to airless injection.

Answer

Correct Answer: A rather misleading term applied to airless injection.

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38. What is sludge?

A tar-like formation in oil resulting from the oxidation of a portion of the oil.

A type of oil that is used in lamps

A by-product of the refining process of crude oil

A substance that is used to make roads and roofs

Answer

Correct Answer: A tar-like formation in oil resulting from the oxidation of a portion of the oil.

Note: This Question is unanswered, help us to find answer for this one

39. What is the skirt?

The lower part of the piston

The upper part of the piston

The connecting rod

The crankshaft

Answer

Correct Answer: The lower part of the piston

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40. What is the advantage of Silent Chain over Ordinary Roller Chain?

Silent chain is more efficient than ordinary roller chain.

Silent chain is less noisy than ordinary roller chain.

Silent chain is more durable than ordinary roller chain.

Silent chain requires less maintenance than ordinary roller chain.

Answer

Correct Answer: Silent chain is less noisy than ordinary roller chain.

Note: This Question is unanswered, help us to find answer for this one

41. What is a silent chain used for?

Increasing the speed of the chain

Transmitting power from one shaft to another

Reducing noise

Lubricating the chain

Answer

Correct Answer: Transmitting power from one shaft to another

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42. What is a silencer?

A device used to clean engines

A device used to increase engine power

A device used to measure engine performance

A device to deaden the sound of the intake or exhaust of an engine; a muffler.

Answer

Correct Answer: A device to deaden the sound of the intake or exhaust of an engine; a muffler.

Note: This Question is unanswered, help us to find answer for this one

43. What is the steel or bronze backing to which the babbitt of a shaft bearing is bonded called?

Shell

Shaft

Bearing

Casing

Answer

Correct Answer: Shell

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44. What does SHP stand for?

Standard home power

Solenoid high pressure

Shaft horsepower

Superior horsepower

Answer

Correct Answer: Shaft horsepower

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45. What is a shaft?

A tool used for digging

A large, tall structure

A round bar of steel or other strong metal that is used to transmit rotary action.

The male reproductive organ

Answer

Correct Answer: A round bar of steel or other strong metal that is used to transmit rotary action.

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46. What is a servomotor?

A device that helps control the speed of an electrical motor

A type of engine used in rc planes and helicopters

A motor operated by oil or air pressure and used for operating heavy control mechanisms.

A RC car engine

Answer

Correct Answer: A motor operated by oil or air pressure and used for operating heavy control mechanisms.

Note: This Question is unanswered, help us to find answer for this one

47. What is the Sensitivity?

Maximum speed at which the governor can act.

Minimum speed at which the governor can act.

Engine speed at which the governor begins to act.

Change in engine speed before the governor begins to act.

Answer

Correct Answer: Change in engine speed before the governor begins to act.

Note: This Question is unanswered, help us to find answer for this one

48. A semidiesel engine is an engine that uses ____ for ignition of the injected fuel?

A spark plug

A hot surface

Diesel fuel

A cold surface

Answer

Correct Answer: A hot surface

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49. What is the main purpose of a seal?

To improve the appearance of an object

To prevent leakage of gas or liquid

To allow liquid or gas to escape

To reduce friction

Answer

Correct Answer: To prevent leakage of gas or liquid

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50. What is a screen?

A wire cloth with a fine mesh used to remove dirt from oil or water.

A device used to measure the size of an object

A device used to view images or videos

A device used to calculate numbers

Answer

Correct Answer: A wire cloth with a fine mesh used to remove dirt from oil or water.

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51. What is the standard American instrument used to measure the viscosity of oils?

Saybolt universal viscometer

Saybolt Furol viscometer

Saybolt viscosimeter

Redwood viscometer

Answer

Correct Answer: Saybolt viscosimeter

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52. What does Rpm stand for?

Registered property mark

Revolutions per minute

Real property management

Right party members

Answer

Correct Answer: Revolutions per minute

Note: This Question is unanswered, help us to find answer for this one

53. What does the word "rotative" mean?

Pertaining to food

Pertaining to rotation.

Pertaining to the moon

Pertaining to the sun

Answer

Correct Answer: Pertaining to rotation.

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54. What does "rotary" mean?

Turning on an axis

A mathematical function

A moving company

A type of engines

Answer

Correct Answer: Turning on an axis

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55. What is the Rocker-arm shaft?

The shaft, usually at the top of the cylinder, that serves as a fulcrum for the rocker arms.

The part of the engine that provides power to the spark plugs

The part of the engine that turns the wheels

The part of the engine that regulates the fuel and air mixture

Answer

Correct Answer: The shaft, usually at the top of the cylinder, that serves as a fulcrum for the rocker arms.

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56. What does a rocker arm do?

It is a type of musical instrument

It is a machine in a factory

A lever that transmits the action of the cam

It is a fabric printing design

Answer

Correct Answer: A lever that transmits the action of the cam

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57. What are ring grooves used for?

To measure the piston rings

To hold the piston barrel

To hold the piston rings

To cut the piston rings

Answer

Correct Answer: To hold the piston rings

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58. What is a rheostat?

A device to regulate the flow of electric current by transforming part or all of it into heat.

A device that transforms light into electrical energy

A device that uses magnetism to generate electricity

A device that increases the voltage of an electrical current

Answer

Correct Answer: A device to regulate the flow of electric current by transforming part or all of it into heat.

Note: This Question is unanswered, help us to find answer for this one

59. What is a force that opposes the motion of a body called?

Resistance

Reflection

Rejection

Reinforcement

Answer

Correct Answer: Resistance

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60. What is Reclaimer?

None of the above

A device used to reclaim land from water

An apparatus in which dirty lubricating oil, which often is discarded is treated and made usable, reclaimed.

To take something back from someone

Answer

Correct Answer: An apparatus in which dirty lubricating oil, which often is discarded is treated and made usable, reclaimed.

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61. What is the definition of reciprocating?

Going backwards

Stopping suddenly

Having a back-and-forth or up-and-down linear motion, such as an engine piston.

Moving in a circle

Answer

Correct Answer: Having a back-and-forth or up-and-down linear motion, such as an engine piston.

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62. What does radial mean?

A straight line from the center to the circumference of a circle

Going in different directions

Meeting at a common point

Extending from a center to the circumference, having the direction of a radius

Answer

Correct Answer: Extending from a center to the circumference, having the direction of a radius

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63. What is a pyrometer?

A device that starts a fire

A measure of the amount of water in something

A type of thermometer

An instrument for measuring high temperatures

Answer

Correct Answer: An instrument for measuring high temperatures

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64. What is the push rod?

The rod that transmits the action of a cam to the cam-operated valve

A device for fishing

A unit of measurement

A type of writing implement

Answer

Correct Answer: The rod that transmits the action of a cam to the cam-operated valve

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65. What does Punk provide?

Extra heat necessary to ignite the first fuel charge in starting some engines

Slow-burning material to ignite the first fuel charge in starting some engines

A type of rock music

A style of fashion

Answer

Correct Answer: Slow-burning material to ignite the first fuel charge in starting some engines

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66. How is pressure usually measured?

In acres

In miles per hour

In pounds per square inch

In feet per second

Answer

Correct Answer: In pounds per square inch

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67. What is another word for pressure?

Force

Speed

Distance

Weight

Answer

Correct Answer: Force

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68. What is preignition?

A fuel

A method of ignition

A type of engine

Ignition taking place before the desired time in the operating cycle in spark-ignition engines.

Answer

Correct Answer: Ignition taking place before the desired time in the operating cycle in spark-ignition engines.

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69. A precombustion chamber is also called?

A piston

An antechamber

A cylinder head

A combustion chamber

Answer

Correct Answer: An antechamber

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70. What is the working stroke of a piston called?

Piston's stroke

Power stroke

Stroke of power

Working stroke of a piston

Answer

Correct Answer: Power stroke

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71. What does pf stand for in the context of electrical engineering?

Passive filter

Potential factor

Power factor

Power of France

Answer

Correct Answer: Power factor

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72. What is the SI unit of power?

Watt

Kilowatt

Joule

Horsepower

Answer

Correct Answer: Watt

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73. What is the pour point?

The temperature at which fuel oil is most dense.

The lowest temperature at which fuel oil will just flow under test conditions.

The highest temperature at which fuel oil will just flow under test conditions.

The temperature at which fuel oil is least viscous.

Answer

Correct Answer: The lowest temperature at which fuel oil will just flow under test conditions.

Note: This Question is unanswered, help us to find answer for this one

74. What does psi stand for?

Pound per square inches

Pounds per square inch

Pound per square inch

Pounds per square inches

Answer

Correct Answer: Pound per square inch

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75. What is the definition of the word "port"?

An opening hole, or passage

A type of stage

A sweet red wine

A town or city located on a body of water

Answer

Correct Answer: An opening hole, or passage

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76. What type of valve is a poppet valve?

A valve opened and closed by the action of a spring.

A valve opened by the action of a cam and closed by a spring.

A valve opened by the action of a spring and closed by a cam.

A valve opened and closed by the action of a cam.

Answer

Correct Answer: A valve opened by the action of a cam and closed by a spring.

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77. What is the long piston of a single-acting pump called?

Crankshaft

Piston

Plunger

Rod

Answer

Correct Answer: Plunger

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78. What is the piston stroke?

The piston stroke is equal to the throw of the crankshaft.

The movement of the piston from one end to the other of the piston travel in the cylinder bore.

The movement of the piston from one end to the other of the piston travel in the cylinder head.

The piston stroke is not equal to twice the throw of the crankshaft.

Answer

Correct Answer: The movement of the piston from one end to the other of the piston travel in the cylinder bore.

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79. What is the term for the part of the piston below the piston-ring grooves?

Piston rings

Piston rod

Piston head

Piston skirt

Answer

Correct Answer: Piston skirt

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80. What is the name for the part of the piston located between the piston-ring grooves?

Piston-ring soil

Piston-ring sea

Piston-ring sky

Piston-ring land

Answer

Correct Answer: Piston-ring land

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81. What is the purpose of the piston-ring gap?

To allow for piston flexing

To increase cylinder bore

To reduce friction

To allow for heat expansion

Answer

Correct Answer: To allow for heat expansion

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82. What is the purpose of a piston ring?

To form a seal between the piston and the cylinder wall

To form a leakproof joint between the piston and the cylinder wall

To lubricate the piston

To keep the piston in place

Answer

Correct Answer: To form a leakproof joint between the piston and the cylinder wall

Note: This Question is unanswered, help us to find answer for this one

83. What is the device used to hold or lock the piston pin in the piston called?

Piston-pin holder

Piston-pin oil

Piston-pin lube

Piston-pin lock

Answer

Correct Answer: Piston-pin lock

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84. What is the name given to that part of the piston which takes the piston pin?

Piston-pin boss

Piston-pin

Piston boss

Pin boss

Answer

Correct Answer: Piston-pin boss

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85. What is the top of the piston called?

Piston crown

Piston rod

Piston bottom

Piston head

Answer

Correct Answer: Piston crown

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86. What is a pintle?

A type of beer

An Old English measure of weight

A small extension of the needle-valve tip projecting through the discharge nozzle

A kind of fastener used on shoes

Answer

Correct Answer: A small extension of the needle-valve tip projecting through the discharge nozzle

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87. What are packing rings?

A type of primate

Rubber rings used to form a watertight joint at the bottom of the cylinder liner.

A tight group of people

The state of being packed

Answer

Correct Answer: Rubber rings used to form a watertight joint at the bottom of the cylinder liner.

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88. What is packing?

A unit of measurement

A material used to seal a joint against leakage.

A type of food

A method of transportation

Answer

Correct Answer: A material used to seal a joint against leakage.

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89. What is the percentage of Oxygen in atmospheric air by volume?

A third

Less than one fourth

More than one fourth

Half

Answer

Correct Answer: Less than one fourth

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90. What does oxygen readily combine with?

Mixtures

Compounds

Elements

Other substances

Answer

Correct Answer: Other substances

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91. What is an outboard bearing?

A bearing inside the engine proper, not carrying an extension of the crankshaft.

A bearing outside the engine proper, carrying an extension of the crankshaft.

A bearing inside the engine proper, carrying an extension of the crankshaft.

A bearing outside the engine proper, not carrying an extension of the crankshaft.

Answer

Correct Answer: A bearing outside the engine proper, carrying an extension of the crankshaft.

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92. What is an Otto cycle?

An engine cycle in which combustion takes place at constant volume.

An engine cycle in which heat is added at constant volume.

An engine cycle in which work is done on the system.

An engine cycle in which combustion takes place at constant pressure.

Answer

Correct Answer: An engine cycle in which combustion takes place at constant volume.

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93. What does the word "orifice" mean?

A large square opening

A small square opening

A large round opening

A small round opening

Answer

Correct Answer: A small round opening

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94. What is an opposed-piston engine?

An engine that has two pistons within the same cylinder, traveling in opposite directions.

An engine in which the pistons are mounted on opposite sides of the crankshaft

An engine with two valves per cylinder that are actuated by a camshaft

An engine with two cylinders mounted side-by-side

Answer

Correct Answer: An engine that has two pistons within the same cylinder, traveling in opposite directions.

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95. What are oil grooves?

A type of engine

Passages cut in bearings for distributing the lubricating oil.

The study of rocks

A gambling game

Answer

Correct Answer: Passages cut in bearings for distributing the lubricating oil.

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96. What is the function of a nozzle in an injector or spray valve?

The nozzle is responsible for the timing of injection of fuel into the cylinder.

The nozzle mixes the fuel and air before injection into the cylinder.

The nozzle contains the holes through which the fuel is injected into the cylinder.

The nozzle regulates the amount of fuel injected into the cylinder.

Answer

Correct Answer: The nozzle contains the holes through which the fuel is injected into the cylinder.

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97. Nitrogen is which of the following?

The most common element in the universe

A very reactive gas

A solid at room temperature

A rather inert gas

Answer

Correct Answer: A rather inert gas

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98. What is the chemical symbol for Nitrogen?

Answer

Correct Answer: N

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99. What is the main use of Nickel?

Clocks

Currency

Jewelry

When alloyed to steel and cast iron, it improves their mechanical properties.

Answer

Correct Answer: When alloyed to steel and cast iron, it improves their mechanical properties.

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100. What does a needle valve do?

Stores fuel oil for the engine

Controls the timing of when fuel enters the engine

Mixes fuel and oil together

Prevents fuel oil from entering the engine cylinder

Answer

Correct Answer: Prevents fuel oil from entering the engine cylinder

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101. What is a muffler?

A type of bread

A winter garment worn around the neck and head

A device used to diminish noise of the intake or exhaust

A small mammal

Answer

Correct Answer: A device used to diminish noise of the intake or exhaust

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MCQ on Basic Power Engineering, Power Plant Engineering	MCQ on Internal Combustion Engines
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