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Advanced Internal Combustion Engines MCQ

1. What is the process by which a substance changes from vapor to the liquid state?

Melting

Condensation

Freezing

Sublimation

Answer

Correct Answer: Condensation

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

2. What does "Concentric" mean?

Something that is round

Moving outward from a common center

Having a common center

Having the same start and end

Answer

Correct Answer: Having a common center

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3. What is the "air pump" called which provides compressed air for a diesel engine?

Wastegate

Blowoff valve

Turbocharger

Compressor

Answer

Correct Answer: Compressor

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4. What is the compression stroke?

The stroke of the piston during which the air charge in the cylinder is compressed by the piston movement.

The stroke of the piston during which the air charge in the cylinder is expanded by the piston movement.

The stroke of the piston during which the air charge in the cylinder is ignited by the spark plug.

The stroke of the piston during which the air charge in the cylinder is cooled by the piston movement.

Answer

Correct Answer: The stroke of the piston during which the air charge in the cylinder is compressed by the piston movement.

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

5. What do compression rings do?

Increase compression pressure

Decrease compression pressure

Provide a seal against excessive oil consumption

Seal against loss of compression pressure and against gas blowing.

Answer

Correct Answer: Seal against loss of compression pressure and against gas blowing.

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6. What is a compression relief?

A device to reduce the compression in a cylinder and thus to make cranking easier.

A device that is used in conjunction with a crankshaft to make cranking easier.

A device to make the cylinder larger and thus to make cranking easier.

A device to increase the compression in a cylinder and thus to make cranking harder.

Answer

Correct Answer: A device to reduce the compression in a cylinder and thus to make cranking easier.

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7. WHAT IS COMPRESSION PRESSURE?

The pressure of the air charge at the beginning of the compression stroke.

The pressure of the air charge at the end of the compression stroke.

The pressure of the air charge during the stroke.

The pressure of the air charge at the end of the intake stroke.

Answer

Correct Answer: The pressure of the air charge at the end of the compression stroke.

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8. What is the definition of compression?

The act or result of pressing a substance into a liquid.

The act or result of expanding a substance into a larger space.

The act or result of pressing a substance into a solid.

The act or result of pressing a substance into a smaller space.

Answer

Correct Answer: The act or result of pressing a substance into a smaller space.

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9. What is the combustion chamber?

The mixture of fuel and air that burns in the engine

The part of the engine where the pistons are located

The amount of air and fuel that is let into the engine

The space above the piston in which the fuel-air mixture starts to burn

Answer

Correct Answer: The space above the piston in which the fuel-air mixture starts to burn

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

10. What is combustion?

A chemical reaction between two substances in the presence of oxygen

The rapid oxidation, or combination, of a combustible such as carbon, hydrogen, or sulfur, with oxygen of air.

The process of burning

The act of setting fire to something

Answer

Correct Answer: The rapid oxidation, or combination, of a combustible such as carbon, hydrogen, or sulfur, with oxygen of air.

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11. What is a coefficient?

A number that decreases the value of a variable.

A ratio; a factor or quantity that remains constant.

A number that increases the value of a variable.

A number representing the value of a variable.

Answer

Correct Answer: A ratio; a factor or quantity that remains constant.

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12. Clearance is the space between a moving and a stationary part that is required to allow for what?

Air to circulate

Electricity to flow

Lubrication and for expansion and contraction with a change of temperature.

For two objects to not touch

Answer

Correct Answer: Lubrication and for expansion and contraction with a change of temperature.

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13. What is the main function of a check valve?

To regulate the passage of a liquid or gas in one direction only.

To allow the passage of a liquid or gas in one direction or another.

To stop, or check, reverse flow.

To allow the passage of a liquid or gas in one direction only.

Answer

Correct Answer: To stop, or check, reverse flow.

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

14. What is a Chamfer?

A sloped edge.

A 45 degree angle.

A beveled corner.

A decorative edge.

Answer

Correct Answer: A beveled corner.

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15. What is cetene?

A metal

A gas

An element on the periodic table

A hydrocarbon

Answer

Correct Answer: A hydrocarbon

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16. What is the cetane number?

A percentage indicating the ignition quality of diesel fuels.

An empirical formula for determining the lean do not run conditions in an internal combustion engine

The speed of sound in a particular medium

The number of carbon atoms in a molecule of a compound

Answer

Correct Answer: A percentage indicating the ignition quality of diesel fuels.

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17. What is cetane?

A hydrocarbon used in testing the ignition quality of diesel fuels.

A measure of how much compression a given fuel can withstand before detonating

The octane rating of a fuel

The additive used in diesel fuel to prevent gelling

Answer

Correct Answer: A hydrocarbon used in testing the ignition quality of diesel fuels.

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18. What is the name of the force that tends to pull objects away from the axis of rotation?

Centrifugal force

Centripetal force

Gravitational force

Magnetic force

Answer

Correct Answer: Centrifugal force

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19. What is carbon monoxide?

A gas composed of molecules of only oxygen

A liquid made up of molecules of carbon and oxygen

Gas composed of molecules made up of one atom of carbon and one of oxygen.

A gas composed of molecules of only carbon

Answer

Correct Answer: Gas composed of molecules made up of one atom of carbon and one of oxygen.

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20. Carbon dioxide is a(n) ___________?

Solid

Liquid

Gas

Plasma

Answer

Correct Answer: Gas

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21. What is the main constituent of liquid and solid fuels?

Carbon

Nitrogen

Hydrogen

Oxygen

Answer

Correct Answer: Carbon

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22. What is the "cam follower"?

That part of the push rod that is in contact with the cam.

A device used to measure an angle

The raised portion of a a cam that actuates a valve

A follower is a type of valves

Answer

Correct Answer: That part of the push rod that is in contact with the cam.

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23. What is the camshaft?

The driving shaft of an engine to which the propeller is attached.

The shaft which carries the various cams required for the operation of inlet, exhaust, fuel, and starting-air valves.

A heavy metal bar used to secure a door or gate.

A large horizontal beam used for propelling a ship

Answer

Correct Answer: The shaft which carries the various cams required for the operation of inlet, exhaust, fuel, and starting-air valves.

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24. What is the purpose of a cam?

To impart a desired motion to poppet valves

To act as a switch

To store energy

To provide power

Answer

Correct Answer: To impart a desired motion to poppet valves

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25. What does the term "by-pass" refer to?

A passage which permits a liquid or gas to take a course other than that normally used.

An detour around a city

Extra credit given to students

A type of surgery

Answer

Correct Answer: A passage which permits a liquid or gas to take a course other than that normally used.

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26. What is burning commonly substituted for?

Eruption

Combustion

Perspiration

Inflammation

Answer

Correct Answer: Combustion

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27. How many degrees Fahrenheit does one British thermal unit raise the temperature of one pound of water?

Ten degrees Fahrenheit

Twenty degrees Fahrenheit

Five degrees Fahrenheit

One degree Fahrenheit

Answer

Correct Answer: One degree Fahrenheit

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28. What does bmep stand for?

Basic moving equilibrium point

Break master engine parts

British manufactured engineered parts

Brake mean effective pressure

Answer

Correct Answer: Brake mean effective pressure

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29. What is the useful horsepower delivered by an engine that may be found by the use of a prony brake?

Belt horsepower

Brake horsepower

Boiler horsepower

British horsepower

Answer

Correct Answer: Brake horsepower

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30. What is the escape of gases from the engine cylinder into the crankcase called?

Ring-sticking

Incomplete combustion

Engine knocking

Blow-by

Answer

Correct Answer: Blow-by

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31. What is the interior diameter of an engine or compressor cylinder called?

Compression ratio

Cylinder

Combustion chamber

Bore

Answer

Correct Answer: Bore

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32. What is the bedplate?

The part of the engine that houses the crankshaft

A structural component of an airplane

The lower part of the engine resting on the foundation.

A tool used to measure angles

Answer

Correct Answer: The lower part of the engine resting on the foundation.

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33. What is bock pressure?

The resistance to the normal flow of gases and liquids.

The amount of space an object takes up in a given container.

The force needed to move an object through a liquid

A measure of how much liquid is in a container

Answer

Correct Answer: The resistance to the normal flow of gases and liquids.

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34. What is Babbitt used for?

Making tools

For Plumbing

For electrical wiring

Lining bearings

Answer

Correct Answer: Lining bearings

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35. What is an Axis?

A line about which a body rotates or about which it is arranged.

A center line

A line perpendicular to the x-axis

A line parallel to the x-axis

Answer

Correct Answer: A line about which a body rotates or about which it is arranged.

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36. What does the word "Axial" mean?

Perpendicular to the center line of a cylinder or shaft

Extending along or in the direction of an axis

Parallel to the center line of a cylinder or shaft.

At a right angle to the center line of a cylinder or shaft

Answer

Correct Answer: Parallel to the center line of a cylinder or shaft.

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37. What does it mean to atomize?

To spread a liquid over a surface

To evaporate a liquid

To mix a liquid with a gas

To break up a liquid into extremely fine particles.

Answer

Correct Answer: To break up a liquid into extremely fine particles.

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38. What is the pressure of the atmosphere at sea level?

12.3 psi

11.9 psi

15.2 psi

14.7 psi

Answer

Correct Answer: 14.7 psi

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39. What is the range of Diesel fuel's API gravity?

32 to 55 API

18 to 41 API

45 to 60 API

10 to 15 API

Answer

Correct Answer: 18 to 41 API

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40. What is API gravity?

The number of miles until a car needs an oil change

An American Petroleum Institute designation for diesel fuels

A way to measure the fuel efficiency of a car

A scale to designate the specific gravity of mineral oils

Answer

Correct Answer: A scale to designate the specific gravity of mineral oils

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41. What does API stand for?

Association for Public Information

Association for Private Investigators

American Petroleum Institute

American Political Institute

Answer

Correct Answer: American Petroleum Institute

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42. What is another name for a precombustion chamber?

Antechamber

Coal mine

Outer space

Greenhouse

Answer

Correct Answer: Antechamber

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43. At what temperature does the mixture of aniline and oil become turbid or cloudy?

5 degrees Celsius

20 degrees Celsius

The aniline number

10 degrees Celsius

Answer

Correct Answer: The aniline number

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44. What is a general term describing all methods of injecting fuel without the use of compressed air?

Compressed air

Airless injection

Fuel injection

Carburetion

Answer

Correct Answer: Airless injection

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45. What does an air filter do?

Remove particles of dust from the engine

Add particles of dust to the engine

Circulated the engine

Prevent particles of dust from entering the engine.

Answer

Correct Answer: Prevent particles of dust from entering the engine.

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46. From which part of the engine does air flow back into the cylinder?

Air cell

Connecting rod

Piston

Crankshaft

Answer

Correct Answer: Air cell

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47. What is the meaning of "advance"?

The distance beside of top or bottom

The distance inside of top or bottom

The distance behind of top or bottom

The distance ahead of top or bottom

Answer

Correct Answer: The distance ahead of top or bottom

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48. What is the meaning of the word "Adiabatic"?

Greek word

Cylinder walls

No pass through

Loss or gain of heat

Answer

Correct Answer: No pass through

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49. What is the rate at which the speed of an object increases called?

Velocity

Mileage

Deceleration

Acceleration

Answer

Correct Answer: Acceleration

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50. What does it mean to accelerate?

To change the direction of movement

To increase the speed of movement

To decrease the speed of movement

To stop the movement

Answer

Correct Answer: To increase the speed of movement

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51. What is the temperature above absolute zero?

Negative temperature

Absolute temperature

Zero temperature

Positive temperature

Answer

Correct Answer: Absolute temperature

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52. What is perfect vacuum pressure?

-14.696 psi

Absolute zero pressure

29.92 inHg

0 psi

Answer

Correct Answer: Absolute zero pressure

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53. What is the unit of measurement for absolute pressure?

MmHg

Bar

Atm

Psi

Answer

Correct Answer: Psi

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54. Which of the following is NOT a method used to start an IC engine?

Electric motor

Electric battery

Flywheel

Starter

Answer

Correct Answer: Flywheel

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55. What is the full name for speed control-cruise control?

Automatic electronic control system

Automatic mechanical control system

Cruise control

Automatic electric-mechanical control system

Answer

Correct Answer: Automatic electric-mechanical control system

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56. What is the purpose of a spark plug?

To initiate combustion in an SI engine

To make a car go smoother

To make a car go faster

To make a car go quieter

Answer

Correct Answer: To initiate combustion in an SI engine

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57. What is a push rod?

Mechanical linkage between the camshaft and valves

Crankshaft in the engine

A device that helps open the valves

A element of the valvetrain

Answer

Correct Answer: Mechanical linkage between the camshaft and valves

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58. What is the function of piston rings?

To seal the combustion chamber

To cool the piston

To form a sliding surface against the cylinder walls

To lubricate the piston

Answer

Correct Answer: To form a sliding surface against the cylinder walls

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59. What is the Piston?

The pressure forces in the combustion chamber

The cylindrical-shaped mass that doesn't reciprocate back and forth in the cylinder

The rotating crankshaft

The cylindrical-shaped mass that reciprocates back and forth in the cylinder

Answer

Correct Answer: The cylindrical-shaped mass that reciprocates back and forth in the cylinder

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60. What is the oil sump?

Part of the engine that cools the oil

Part of the engine that lubricates the pistons

A type of motor oil

Reservoir for the oil system of the engine, commonly part of the crankcase.

Answer

Correct Answer: Reservoir for the oil system of the engine, commonly part of the crankcase.

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61. How is an oil pump most commonly driven?

Electrically

Magically

Splash distribution

Mechanically by the engine

Answer

Correct Answer: Mechanically by the engine

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62. What is the function of an oil pan?

To clean the engine

To hold oil for the engine

To lubricate the engine

To cool the engine

Answer

Correct Answer: To hold oil for the engine

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63. How many main bearings would be equal to the number of pistons?

One piston

One between each set of pistons plus the two ends

Three pistons

Two pistons

Answer

Correct Answer: One between each set of pistons plus the two ends

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64. What does a head gasket do?

A device that regulates the timing of the engine

Gasket which serves as a sealant between the engine block and head where they bolt together

Stopping oil from entering the combustion chamber

A measure of the ability of an engine to resist 'knocking' or 'pinging' during combustion

Answer

Correct Answer: Gasket which serves as a sealant between the engine block and head where they bolt together

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65. Which of the following is true about a head?

It creates the spark for combustion

It closes the end of the cylinder

It contains the fuel for combustion

It regulates the exhaust

Answer

Correct Answer: It closes the end of the cylinder

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66. What does the head of a cylinder usually contain?

Part of the clearance volume of the combustion chamber

The spark plug

The piston

The crankshaft

Answer

Correct Answer: Part of the clearance volume of the combustion chamber

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67. What is a glow plug?

An ignition system

A type of gasoline

A small electrical resistance heater used to preheat the combustion chamber of a CI engine

A part of the engine used to start the engine

Answer

Correct Answer: A small electrical resistance heater used to preheat the combustion chamber of a CI engine

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68. How is a fuel pump powered?

Gasoline

Electrically or mechanically

LPG

Wood

Answer

Correct Answer: Electrically or mechanically

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69. Many modern automobiles have a fuel pump that is _____?

Windmill

Solar powered

Electric

Manual

Answer

Correct Answer: Electric

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70. What does a fuel injector do?

Sprays fuel into the incoming air on SI engines or into the cylinder on CI engines

Regulates the amount of fuel that enters the engine

Ignites the fuel-air mixture in the engine

Stores fuel for the engine

Answer

Correct Answer: Sprays fuel into the incoming air on SI engines or into the cylinder on CI engines

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71. What is the purpose of a flywheel?

To smooth out engine operation.

Stores energy and furnishes a large angular momentum to keep the engine rotating between power strokes.

To increase the speed of the engine.

To keep the engine cool

Answer

Correct Answer: Stores energy and furnishes a large angular momentum to keep the engine rotating between power strokes.

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72. What does an engine-driven fan do?

Removes waste heat from the engine

Adds air to the engine

Increases air flow through the radiator and engine compartment

Decreases air flow through the radiator and engine compartment

Answer

Correct Answer: Increases air flow through the radiator and engine compartment

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73. What is the exhaust system?

Flow system for removing exhaust gases from the cylinders, treating them, and exhausting them to the surroundings.

System that helps to cool the engine

System that produces exhaust gases

System that helps the engine to function properly

Answer

Correct Answer: Flow system for removing exhaust gases from the cylinders, treating them, and exhausting them to the surroundings.

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74. What is an exhaust manifold?

A device used to measure engine performance

A piping system which carries exhaust gases away from the engine cylinders

The fuel used to power the engine

The person who operates the engine

Answer

Correct Answer: A piping system which carries exhaust gases away from the engine cylinders

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75. What are the circular cylinders in the engine block?

Cylinders

Pistons

Crankshafts

Camshafts

Answer

Correct Answer: Cylinders

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76. What is the crankshaft?

The rotating crankshaft itself.

The part of the engine block that makes up the crankcase housing

Part of the engine block that surrounds the rotating crankshaft.

The oil pan

Answer

Correct Answer: Part of the engine block that surrounds the rotating crankshaft.

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77. What are cooling fins?

Cylinders and head without fins.

The inside surfaces of cylinders and head of an aircooled engine.

Metal fins on the outside surfaces of cylinders and head of an aircooled engine.

It is a type of coolant.

Answer

Correct Answer: Metal fins on the outside surfaces of cylinders and head of an aircooled engine.

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78. What is a connecting rod bearing?

Part of the crankshaft

Bearing where connecting rod fastens to crankshaft.

The area where the connecting rod and piston connect.

Bearing in the connecting rod

Answer

Correct Answer: Bearing where connecting rod fastens to crankshaft.

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79. The size of the combustion chamber changes with what?

The amount of fuel

The amount of oxygen

The temperature

The position of the piston

Answer

Correct Answer: The position of the piston

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80. The size of the combustion chamber _______?

Remains the same

Continuously changes

Decreases

Increases

Answer

Correct Answer: Continuously changes

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81. What is a catalytic converter?

A device that measures the amount of exhaust emissions

A device that increases the efficiency of the engine

Chamber mounted in exhaust flow containing catalytic material that promotes reduction of emissions by chemical reaction.

A device that controls the amount of fuel and air mixture in the engine

Answer

Correct Answer: Chamber mounted in exhaust flow containing catalytic material that promotes reduction of emissions by chemical reaction.

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82. What is the Venturi flow device?

A device which meters the proper amount of air into the fuel flow by means of a pressure differential

A device which measures the amount of air flow by means of a pressure differential

A device which meters the proper amount of fuel into the air flow by means of a pressure increase

A device which meters the proper amount of fuel into the air flow by means of a pressure differential

Answer

Correct Answer: A device which meters the proper amount of fuel into the air flow by means of a pressure differential

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83. What is the purpose of the Camshaft?

To cool the engine

To hold the engine together

To create energy

To push open valves at the proper time in the engine cycle

Answer

Correct Answer: To push open valves at the proper time in the engine cycle

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84. What is the Block Body of an engine made of?

Titanium

Cast Iron or Aluminum

Magnesium

Carbon Fiber

Answer

Correct Answer: Cast Iron or Aluminum

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85. What is Fuel Injected (FI)?

A system for metering fuel into an internal combustion engine

A device for measuring the quantity of fuel in a storage tank

A unit of measurement for fuel consumption

A regulatory agency that sets standards for fuel injection systems

Answer

Correct Answer: A system for metering fuel into an internal combustion engine

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86. Where is the overhead camshaft mounted?

In the engine block

In the crankshaft

In the engine head

On the intake manifold

Answer

Correct Answer: In the engine head

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87. What is an overhead valve?

A device that regulates the amount of fuel

A cover for the engine

A valve mounted in the engine head

A gear in the transmission

Answer

Correct Answer: A valve mounted in the engine head

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88. What is the Brake Maximum Torque (BMT)?

Speed at which maximum torque occurs.

The amount of torque that can be applied to a brake before it fails.

The speed of a vehicle when the brakes are applied.

The amount of torque required to stop a vehicle.

Answer

Correct Answer: Speed at which maximum torque occurs.

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89. What is the ratio of mass of fuel to mass of air input into an engine called?

Air-Fuel Ratio (AF)

Fuel-Air Ratio (FA)

Force-Air Ratio (FA)

Fuel-Force Ratio (FF)

Answer

Correct Answer: Fuel-Air Ratio (FA)

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90. What is the Air-Fuel Ratio (AF)?

The temperature at which fuel burns in an engine

The ratio of mass of air to mass of fuel input into engine.

The amount of power an engine produces from a given amount of fuel

The amount of fuel needed to produce a given amount of power

Answer

Correct Answer: The ratio of mass of air to mass of fuel input into engine.

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91. What does a smart engine do?

Make the car go slower

Use less fuel

Make the car go faster

Regulate operating characteristics such as air-fuel ratio, ignition timing, valve timing, exhaust control, intake tuning, etc.

Answer

Correct Answer: Regulate operating characteristics such as air-fuel ratio, ignition timing, valve timing, exhaust control, intake tuning, etc.

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92. What is the formula for displacement?

Displacement = Force x Distance

Displacement = Mass x Acceleration

Displacement = Volume displaced by the piston as it travels through one stroke

Displacement = Velocity x Time

Answer

Correct Answer: Displacement = Volume displaced by the piston as it travels through one stroke

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93. What is the minimum volume in the combustion chamber with the piston at TDC?

Swept volume

Clearance volume

Combustion chamber volume

Engine displacement

Answer

Correct Answer: Clearance volume

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94. What is the definition of "stroke?"

BDC to TDC

TDC to BDC

Distance between two consecutive piston movements.

Movement distance of the piston from one extreme position to the other: TDC to BDC or BDC to TDC.

Answer

Correct Answer: Movement distance of the piston from one extreme position to the other: TDC to BDC or BDC to TDC.

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95. What is the full form of TDC?

Top Driving Capacity

Training for Distance Course

Total Distance Covered

Top Dead Centre

Answer

Correct Answer: Top Dead Centre

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96. What is the bore diameter?

The distance from one point to another on the surface of a sphere

The longest dimension of an object

The distance between the centers of the two opposite sides of a circular object

The cylinder or diameter of the piston face, which is the same minus a very small clearance

Answer

Correct Answer: The cylinder or diameter of the piston face, which is the same minus a very small clearance

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

97. What is Indirect Injection?

Fuel injection into the primary chamber of an engine with a divided combustion chamber

Fuel injection into the quaternary chamber of an engine with a divided combustion chamber

Fuel injection into the secondary chamber of an engine with a divided combustion chamber

Fuel injection into the tertiary chamber of an engine with a divided combustion chamber

Answer

Correct Answer: Fuel injection into the secondary chamber of an engine with a divided combustion chamber

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

98. What is BDC position of the piston?

The point where the piston is at the top of the engine

The point farthest from the crankshaft

The point where the piston is at the bottom of the engine

The point closest to the crankshaft

Answer

Correct Answer: The point closest to the crankshaft

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99. What is the position called when an occurrence happens before TDC?

TDC

Head-End-Dead-Center

BTDC

B Te

Answer

Correct Answer: BTDC

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100. What does the acronym TDC stand for in engine terminology?

Top-Dead-Center

Top-Down-Center

Too- Dull- to- Care

The- Darn- Cat

Answer

Correct Answer: Top-Dead-Center

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101. What is the other name for Compression Ignition?

4-stroke

DOHC

Two-stroke

Answer

Correct Answer: CI

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102. What is a Spark Ignition engine?

An engine in which the combustion process in each cycle is started by use of a flywheel.

An engine in which the combustion process in each cycle is started by use of a spark plug.

An engine in which the combustion process in each cycle is started by use of a piston.

An engine in which the combustion process in each cycle is started by use of a crankshaft.

Answer

Correct Answer: An engine in which the combustion process in each cycle is started by use of a spark plug.

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103. What is meant by Internal Combustion?

The burning of fuel outside an engine

The burning of fuel inside an engine

The burning of fuel in the air

The burning of fuel under water

Answer

Correct Answer: The burning of fuel inside an engine

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

104. What is the full form of "Ie"?

Ideal Engine

Intense Combustion

International Enterprise

Internal Combustion

Answer

Correct Answer: Internal Combustion

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

Automotive Engineering, Vehicle Engineering MCQs | Topic-wise

MCQ on Advanced Combustion	MCQ on Advanced Energy Solutions
MCQ on Advanced Engineering Acoustics	MCQ on Advanced Internal Combustion Engines
MCQ on Automotive Engineering Project	MCQ on Basic Automotive Engineering, Vehicle engineering
MCQ on Composite Materials	MCQ on Dynamics and Control of Connected Vehicles
MCQ on Electric Machinery and Drives	MCQ on Self Driving Cars: Perception and Control
General Automotive Engineering, Vehicle Engineering MCQs