IC Engine (Internal combustion engine) MCQs
IC Engine (Internal combustion engine) MCQs
The following IC Engine (Internal combustion engine) MCQs have been compiled by our experts through research, in order to test your knowledge of the subject of IC Engine (Internal combustion engine). We encourage you to answer these multiple-choice questions to assess your proficiency.
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1: What is the connecting rod?
A. The engine part which helps in the ignition of the engine.
B. The engine part which connects the piston to the wheels.
C. The engine part which provides power to the engine.
D. The engine part which connects the piston to the crankshaft.
2: What is a connecting rod bearing?
A. The bearing located in the large end of the connecting rod by which it is attached to the crankshaft.
B. The bearing located in the large end of the connecting rod by which it is attached to the piston.
C. The bearing located in the large end of the connecting rod by which it is attached to the cylinder.
D. The bearing located in the small end of the connecting rod by which it is attached to the crankshaft.
3: What is the term for a value in an equation which does not change?
A. Constant
B. Variable
C. Function
D. Term
4: What is combustion of fuel in a cylinder at so slow a rate that there is no rise in cylinder pressure called?
A. Air injection diesel engine
B. Constant-speed diesel engine
C. Peak combustion
D. Constant-pressure combustion
5: What is combustion in a cylinder so fast that there is no change in volume called?
A. Parallel combustion
B. Spontaneous combustion
C. Controlled combustion
D. Constant-volume combustion
6: What is contraction?
A. Expansion
B. Remaining the same size
C. Becoming smaller in size
D. Becoming larger in size
7: What is the purpose of cooling water?
A. To reduce the amount of noise the engine makes.
B. To prevent excessive heating of cylinders and cylinder heads.
C. To improve the appearance of the engine
D. To provide a water source for dolphins
8: What is a crank?
A. That part of the crankshaft, which is in the form of a crank and crank pin.
B. A device used to measure angles
C. A device used to lift heavy objects
D. A tool used to start a fire
9: What is the crankshaft?
A. The electrical system that powers an engine
B. The middle part of the engine structure surrounding the working parts.
C. The system in charge of cooling an engine
D. The working part of an engine that creates energ
10: What is the lower portion of the engine structure called?
A. Crankcase subbase
B. Crankshaft
C. Piston
D. Bedplate
11: What is the crankpin?
A. A mechanical device that changes rotary motion into linear motion
B. That part of the crank to which the connecting rod is attached.
C. A bicycle
D. An rod that goes through the middle of the crankshaft
12: What does a crankshaft do?
A. Decreases the compression ratio of the engine
B. Increases the compression ratio of the engine
C. Transmits the reciprocating motion of the pistons to the driven unit in the form of rotary motion.
D. Provides a place for the connecting rods to attach
13: What is the crankshaft cheek?
A. A type of cheese.
B. The part of the crankshaft that connects the crankpin to the main crankshaft journal.
C. The part of the crankshaft that connects the connecting rod to the piston.
D. A tool used to fix a broken crankshaft.
14: What is the crankshaft journal?
A. The part of the crankshaft which rotates in the main bearings and transmits the torque developed by the engine.
B. The part of the engine which is responsible for cooling
C. The part of the engine which is responsible for the exhaust
D. The part of the engine which is responsible for the distribution of power
15: What is the crankshaft web?
A. The part of the crankshaft that transmits power to the flywheel
B. The part of the crankshaft that supports the connecting rods
C. The part of the engine that turns the crankshaft
D. The part of the crankshaft between the bearings
16: What is the crosshead supported on?
A. Piston rod
B. Connecting rod
C. Piston pin
D. Guides
17: What is a cycle?
A. The action of exhaling and inhaling
B. A series of events, operations, or movements that repeat themselves in a regular sequence
C. A machine with two or more sets of pedals and gears, propelled by a chain, used for transportation
D. A closed path of a liquid in a container
18: In an engine, combustion takes place in which part?
A. Connecting Rod
B. Crankshaft
C. Carburetor
D. Cylinder
19: What is a cylinder block?
A. The place where a cylinder is located.
B. A number of cylinders cast in one piece.
C. A device that measures the amount of fuel in a cylinder.
D. The bottom part of an engine.
20: What is the term for the inside diameter of an engine cylinder?
A. Crankshaft
B. Cylinder head
C. Piston ring
D. Cylinder bore
21: What is the cylinder head?
A. The part which covers and seals the end of the cylinder and usually contains the pistons.
B. The part which covers and seals the end of the cylinder and usually contains the spark plugs.
C. The part which covers and seals the end of the engine and usually contains the valves.
D. The part which covers and seals the end of the cylinder and usually contains the valves.
22: Which of the following is not a property of the delivery stroke?
A. The stroke of a pump during which the fluid in the pump is forced out of the cylinder.
B. The stroke of a pump during which the fluid in the pump enters the cylinder.
C. The stroke of a pump during which the fluid in the pump is forced into the cylinder
23: What is a violent uncontrolled burning of a fuel in the combustion chamber called?
A. Explosion
B. Ignition
C. Combustion
D. Detonation
24: What type of engine is a diesel engine?
A. A compression-ignition combustion engine
B. A spark-ignition combustion engine
C. A Stirling engine
D. A steam engine
25: What is distillation?
A. A process of making metal stronger
B. A process of making alcohol
C. Separation of the more volatile parts of a liquid from those less volatile by vaporization and subsequent condensation.
D. A type of rock found near the equator
26: What is the function of a distributor?
A. Ignites the air-fuel mixture in the cylinders
B. Keeps the engine cool
C. Directs the flow of fuel or compressed air to the various cylinders of the engine in proper sequence.
D. Stores excess fuel
27: What is dribbling?
A. Fast seeping of fuel oil from the nozzle tip after cutoff of the fuel.
B. Slow seeping of fuel oil from the nozzle tip after cutoff of the fuel.
C. No seeping of fuel oil from the nozzle tip after cutoff of the fuel.
D. Seeping of fuel oil from the nozzle tip before cutoff of the fuel.
28: What is a dynamometer?
A. A device for measuring electrical current.
B. A device for measuring the speed of an object.
C. A device for measuring the strength of an earthquake.
D. A device for determining the power of an engine.
29: What is the meaning of the word "eccentric"?
A. Mount
B. A circle not having the same center as another circle within it
C. A device mounted off-center for converting rotary motion into reciprocating motion
D. Rotary
30: What is efficiency?
A. The amount of work done
B. The ratio of output over input.
C. The rate at which work is done
D. The quality of work done
31: What does EMF stand for?
A. Energy management factor
B. Environmental management factor
C. Electric magnetic field
D. Electromotive force
32: What is energy?
A. Emotion or feeling
B. A natural occurrence
C. Capacity for doing work
D. The happiness one experiences when they are doing something they love
33: What does an engine do?
A. Pumps water
B. Cuts wood
C. Produces power to do work
D. Burns coal
34: What is the act of discharging gases from an engine after they have done work called?
A. Gases
B. Engine
C. Discharge
D. Exhaust
35: What is the exhaust cam?
A. A kind of fuel
B. The cam that controls the operation of the exhaust valve.
C. A type of engine
D. The cam that controls the operation of the intake valve.
36: What are exhaust gases?
A. The gases used to cool the engine
B. The unused air and fuel mixture in the cylinder
C. Products of combustion which are discharged from the cylinder after doing work on the piston.
D. The air and fuel mixture that is combusted in the cylinder
37: What is the exhaust manifold?
A. The pipe that collects the unburnt gases as they are expelled from the cylinders.
B. The pipe that burns the unburnt gases before they are expelled from the cylinders.
C. The pipe that cools the burnt gases before they are expelled from the cylinders.
D. The pipe that collects the burnt gases as they are expelled from the cylinders.
38: What is an exhaust pyrometer?
A. A machine used to generate exhaust
B. An instrument used to measure the temperature of the exhaust
C. A tool used to mix exhaust
D. A device used to measure the amount of exhaust
39: What is the function of an exhaust valve?
A. The valve through which the unburnt gases are allowed to pass out to the intake manifold.
B. The valve through which the unburnt gases are allowed to pass out to the exhaust manifold.
C. The valve through which the unburnt gases are allowed to pass out to the cylinder head.
D. The valve through which the burnt gases are allowed to pass out to the exhaust manifold.
40: The expansion period is the portion of the power stroke during which:?
A. The spark plug fires.
B. The engine is idling.
C. The combustion gases expand from the movement of the piston and thus do work.
D. The piston is at the top of its stroke.
41: What does a filter do?
A. Adds dirt and impurities to air, oil, or water.
B. Remove dirt and other impurities from air, oil, or water.
C. Creates air, oil, and water.
D. Sorts air, oil, and water.
42: What does the term "Fit" mean in regards to machined engine parts?
A. The desired positive or negative clearance between the surfaces of two machined engine parts.
B. When two engine parts are too close together.
C. The process of making two engine parts match each other
D. Two matching engine parts that have been machined
43: What is Fluctuation?
A. Oscillation
B. Upheaval
C. Alteration
D. Variation in value
44: What is the flywheel responsible for?
A. To keep the crankshaft in place
B. Gives the crankshaft momentum to carry the pistons through the compression stroke.
C. To connect the crankshaft to the pistons
D. To provide power to the crankshaft
45: What is the unit in which work is measured?
A. Watt
B. Newton
C. Foot pound
D. Joule
46: Which of the following is NOT a type of engine?
A. Wankel engine
B. Four-stroke engine
C. Two-stroke engine
D. Diesel engine
47: What is the part of an engine between the cylinders and the bedplate?
A. Cylinders
B. Framing
C. Crankcase
D. Bedplate
48: What is friction?
A. The force that causes two surfaces to slide past each other.
B. The force that one object exerts on another object.
C. A measure of the amount of wear on a surface.
D. The resistance to relative motion between two bodies in contact.
49: What is friction horsepower?
A. The power consumed within the engine from friction between its parts.
B. The power lost to friction when an object is moved.
C. The power required to move an object across a surface.
D. The power generated by the engine to overcome friction.
50: What is the device which sprays the fuel into the cylinder called?
A. Carburetor
B. Ignition Coil
C. Fuel Pump
D. Fuel Injector
51: What is the noise produced in the cylinder of a diesel engine during combustion called?
A. Engine knock
B. Timing knock
C. Fuel knock
D. Lack of knock
52: What is the function of the fuel pump?
A. Injects the fuel into the engine
B. Stores the fuel
C. Start the engine
D. Delivers the fuel to the injector
53: What is the term for the support on which a lever turns?
A. Weight
B. Point
C. Fulcrum
D. Center
54: What is a gasket?
A. A device used to measure the volume of a liquid
B. A type of adhesive tape
C. Packing placed between two surfaces that must have a leakproof joint.
D. A tool used in carpentry
55: What is a governor?
A. A mechanism used to control the speed of an engine.
B. A device that closes and opens a valve
C. A state official with ranking authority
D. A machine that produces rotary motion
56: What is heat?
A. A form of energy
B. A lightbulb
C. The element of fire
D. A measure of hotness
57: What is the unit of heat?
A. Calorie (cal)
B. Watt (W)
C. Joule (J)
D. British thermal unit (Btu)
58: What is the heat value?
A. The rate of heat flow
B. The heat developed by the combustion of one pound of fuel
C. The average temperature of the Earth's surface
D. The amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit
59: What is the unit of heat value?
A. Calories per second
B. Joules per second
C. Btu per Pound
D. Btu per second
60: What does it mean if something is helical?
A. Having the shape of a spiral.
B. Having the shape of a cog.
C. Having the shape of a wheel.
D. Having the shape of a helix, or screw.
61: What is a helix?
A. An invasive species of snail
B. A shape
C. A line cut on a cylindrical surface shaped like a screw thread.
D. A mineral
62: What is the rate at which work is done?
A. One horsepower = 33,000 ft-lb. per min.
B. A unit for measuring power.
C. Rate at which work is done.
D. One horsepower = 33,000 ft-lb. per min.
E. Abbreviated hp.
63: One horsepower is equal to ____?
A. 1,000 ft-lb. per min.
B. 33,000 ft-lb. per min.
C. 30,000 ft-lb. per min.
D. 15,000 ft-lb. per min.
64: What is hunting?
A. The activity of searching determinedly for someone or something
B. Erratic variation of the speed of the governor, also of the engine.
C. A sport in which animals are chased and killed for recreation
D. The practice of killing animals for food or to remove them from an area
65: What does the term "hydraulic" pertain to?
A. Movement of and by air
B. Movement of and by earth
C. Movement of and by water, also by other liquids, such as oils.
D. Movement of and by fire
66: What is idling?
A. Engine running without a load at the highest speed possible.
B. Engine running with a load at the lowest speed possible.
C. Engine running without a load at the lowest speed possible.
D. Engine running at the highest speed possible.
67: What is the rotating part of a centrifugal pump or blower called?
A. Impeller
B. Inlet valve
C. Exhaust valve
D. Piston
68: What is the indicated horsepower?
A. The power required to overcome friction.
B. The power exerted by a piston on the connecting rod.
C. The horsepower developed in the engine cylinder, as calculated from an indicator diagram.
D. The power transmitted by a gear train.
69: What is an Indicator?
A. An animal that gives warning of the approach of danger.
B. Measure of central tendency
C. A photographic film
D. Instrument used to investigate the pressures inside an engine cylinder.
70: Inertia is the tendency of a body to ______?
A. Speed up
B. Maintain its existing velocity
C. Slow down
D. Stop
71: What is injection?
A. The process of making gasoline out of crude oil
B. The forcing of fuel oil into the combustion chamber of a diesel engine by means of high pressure.
C. The exposing of an image to light in a camera
D. The method of cooling an engine with water and coolant
72: What is the function of an injection pump?
A. Inject water into the radiator
B. Fill the tires with air
C. Inject oil into the transmission
D. Inject fuel oil into the combustion space of a diesel engine
73: What is the inlet cam?
A. The cam that controls the operation of the intake valve in a four-stroke engine.
B. The cam that controls the operation of the air intake valve in a two-stroke engine.
C. The cam that controls the operation of the air inlet valve in a four-stroke engine.
D. The cam that controls the operation of the exhaust valve in a four-stroke engine.
74: What is the inlet valve?
A. The valve through which lubricating oil is admitted to the cylinder of a four-stroke engine.
B. The valve through which exhaust gases escape from the cylinder of a four-stroke engine.
C. The valve through which air or the air-fuel mixture is admitted to the cylinder of a four-stroke engine.
D. The valve through which coolant is admitted to the cylinder of a four-stroke engine.
75: What are the two strokes of a Piston?
A. Both are not the strokes of a Piston
B. Only intake stroke
C. Only suction stroke
D. Intake stroke and suction stroke
76: What is an integral?
A. A decimal
B. A whole number
C. A fraction
D. An indivisible part of a whole, constituting a completed whole.
77: What does the word "Intermittent" mean?
A. Infrequent
B. Permanent
C. Occurring at intervals.
D. Continuous
78: What is the main use of a Jack?
A. As a doorstop
B. To turn the flywheel to a desired position
C. To lift or move a heavy object
D. To cut wood
79: What is the purpose of a jacket surrounding an engine cylinder?
A. To reduce engine noise
B. To increase engine speed
C. To improve engine performance
D. To permit circulation of cooling water
80: What is a Jerk Pump?
A. A fuel pump which injects fuel into the cylinder by action of a cam having a sharp nose.
B. A pump which injects fuel into the cylinder by action of a cam having a blunt nose.
C. A fuel pump which injects fuel into the cylinder by action of a cam having a rounded nose.
D. A fuel pump which doesn’t inject fuel into the cylinder by action of a cam having a sharp nose.
81: What is a jet?
A. A stream of fuel or air coming from such an orifice
B. A large orifice used to control the flow of fuel or air
C. A small orifice used to control the flow of fuel or air
D. A small orifice used to increase the flow of fuel or air
82: What is the finished part of a shaft that rotates in a bearing called?
A. Spindle
B. Journal
C. Crankshaft
D. Transmission
83: What is a Jumper?
A. A short, lightweight sweater.
B. A person who attempts to commit suicide by jumping from a high place.
C. A water-pipe connection between a cylinder head and the cylinder jacket or the water-jacketed exhaust manifold.
D. A device used to start a car by providing an electrical connection between the battery and the starter motor.
84: What does a keeper dowel or pin do?
A. Keep piston rings from moving from an assigned position
B. Provide extra support for the piston rings
C. Keep the piston rings from expanding
D. Keep the piston rings lubricated
85: What is the keyway?
A. A type of lock
B. A tennis move
C. The machined slot in a shaft or hub of a wheel to take a steel key.
D. The capital of Sudan
86: What does kilowatt measure?
A. Volume
B. Weight
C. Electrical unite
D. Length
87: What does "Kilowatt" mean?
A. A unit of length equal to one thousand meters
B. A unit of time equal to one thousand seconds
C. An electrical unite of measure equal to one thousand watts.
D. A unit of weight equal to one thousand grams
88: What is a unit of energy equal to a continuous flow of one kilowatt for one hour?
A. Kilowatt
B. Watt-hour
C. Joule
D. Kilowatt-hour
89: What is kinetic energy?
A. The energy of a moving body due to its mass.
B. The energy of a moving body due to its mass and velocity.
C. The energy of a moving body.
D. The energy of a moving body due to its velocity.
90: What does the word "laminated" mean?
A. Made of thin layers
B. Covered in a sticky substance
C. To beat severely
D. Having a smooth surface
91: What is a shim?
A. A thin metal sheet used to fill in spaces between objects.
B. A tool used to sharpen knives
C. A type of bread
D. A unit of measurement.
92: What is the land?
A. A large area of uncultivated ground
B. An area of level ground
C. The portion of the piston between two grooves carrying the piston rings.
D. The metal ring placed in the groove of a piston to provide a seal
93: What is a Lanova cell?
A. A type of bacteria
B. A special combustion chamber for diesel engines of high rotary speeds.
C. A Russian aircraft manufacturer
D. The capital of Latvia
94: What does the lb. abbreviation stand for?
A. Long ton
B. Pennyweight
C. Pound
D. Litre
95: What is a lean mixture?
A. A mixture in which the proportion of air to fuel cannot be determined.
B. A mixture in which the proportion of air to fuel is equal to that theoretically necessary for completes combustion.
C. A mixture in which the proportion of air to fuel is greater than that theoretically necessary for completes combustion.
D. A mixture in which the proportion of air to fuel is less than that theoretically necessary for completes combustion.
96: What is linear motion?
A. Motion that is not changing.
B. Motion in a curved line.
C. Motion in a straight line.
D. Motion at a constant speed.
97: What is the removable inner engine cylinder in contact with the piston called?
A. Liner
B. Slave
C. Master
D. Crankshaft
98: What is the useful output of an engine at a given moment?
A. Speed
B. Horsepower
C. Load
D. Torque
99: What is the main purpose of a lubricant?
A. To reduce friction
B. To stop motion
C. To increase friction
D. To create motion
100: What is a lubricating pump?
A. A device used to pump water
B. A device used to measure the pressure of a fluid.
C. A pump which handles lubricating oil in an engine.
D. A device used to pump oil
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