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WorksheetsInternal Combustion Engine Quiz
Total questions: 40
Worksheet time: 20mins
The primary purpose of an internal combustion engine is to:
Store heat energy
Convert heat energy into mechanical motion
Create exhaust gases
Cool down the vehicle
The 4-stroke cycle requires how many crankshaft revolutions to complete?
1
2
3
4
During the intake stroke, the piston moves:
Upward, both valves closed
Downward, intake valve open
Downward, exhaust valve open
Upward, exhaust valve open
The power stroke occurs when:
The air-fuel mixture is ignited
The piston compresses the air
The exhaust valve opens
The intake valve closes
During the exhaust stroke, the:
Intake valve opens
Exhaust valve opens
Spark plug fires
Fuel injector sprays fuel
The crankshaft changes:
Rotary motion to linear motion
Linear piston motion into rotary motion
Electrical energy into heat
Oil pressure into power
The camshaft is responsible for:
Ignition timing
Valve timing and lift
Crankshaft balance
Engine lubrication
The piston connects to the crankshaft through the:
Camshaft
Connecting rod
Rocker arm
Flywheel
The combustion chamber is found between:
Cylinder head and piston top
Crankshaft and oil pan
Intake manifold and throttle body
Valve cover and spark plug wire
The spark plug ignites the air-fuel mixture during the:
Intake stroke
Compression stroke
Power stroke
Exhaust stroke
The Otto cycle describes:
Diesel engine operation
4-stroke spark-ignition engines
2-stroke engines
Hybrid electric drive
A higher compression ratio usually means:
Lower fuel efficiency
Greater power and efficiency
More emissions
Lower combustion temperature
The flywheel helps the engine by:
Opening valves
Smoothing out power pulses
Cooling the pistons
Increasing fuel pressure
The crankcase holds:
Oil and the rotating crankshaft
The pistons only
The cylinder head
The camshaft
When the piston is at the top of its travel, it is at:
Bottom Dead Center
Top Dead Center
Mid-Stroke
Power Point
The bore of an engine refers to:
The length of the crankshaft
The diameter of the cylinder
The depth of the piston rings
The size of the combustion chamber
The stroke of an engine is:
The distance a piston travels in the cylinder
The number of valves per cylinder
The crankshaft angle
The spark plug gap
Engine displacement measures:
The size of one cylinder
The total volume of all cylinders
The amount of oil in the crankcase
The air volume in the intake
Increasing bore size generally:
Decreases horsepower
Increases potential power output
Reduces displacement
Improves fuel economy
The formula for displacement includes:
Valve timing and camshaft speed
π × (Bore/2)² × Stroke × Cylinders
Cylinder pressure × crank angle
Air-fuel ratio × engine speed
A higher compression ratio engine requires:
Lower octane fuel
Higher octane fuel
More spark plugs
Thicker oil
The clearance volume is:
The swept area of the piston
The space above the piston at Top Dead Center
The oil space in the crankcase
The fuel injector volume
The combustion chamber is where:
The fuel-air mixture burns to create pressure
Oil circulates around the crankshaft
Air is filtered for intake
The exhaust gases cool
The engine block is typically made of:
Rubber
Cast iron or aluminum
Plastic
Copper
Which of the following is housed inside the engine block?
Pistons, crankshaft, and bearings
Valves and rocker arms
Spark plugs and injectors
Radiator and water pump
A cylinder head attaches to:
The transmission
The engine block
The oil pan
The timing cover
The valves control:
Ignition timing
The flow of air-fuel mixture and exhaust gases
Oil temperature
Crankshaft position
The head gasket seals:
Oil pan to block
Cylinder head to engine block
Transmission housing
Exhaust manifold
The camshaft may be located:
In the block or cylinder head
Only in the block
Only in the head
Next to the crankcase vent
An engine with a V8 configuration has:
8 cylinders in one row
Two banks of 4 cylinders each
Inline cylinders
8 spark plugs total
A V6 engine is generally more compact than:
An inline-6 engine
An inline-4 engine
A V8 engine
A rotary engine
An inline-6 engine is known for:
Rough running
Compact size
Natural balance and smooth operation
Poor torque
Which component converts piston motion into rotary crankshaft motion?
Rocker arm
Connecting rod
Camshaft
Valve spring
Which stroke requires both valves to be closed?
Intake
Compression
Exhaust
The timing chain or belt connects:
Camshaft and crankshaft
Pistons and valves
Flywheel and starter motor
Crankshaft and transmission
The valve spring ensures:
The valve closes after being opened
Oil stays in the head
Fuel atomizes properly
The spark occurs earlier
The piston rings seal:
The crankcase from the fuel tank
The combustion chamber from the crankcase
The valves from the camshaft
The cooling system
The cylinder head ports allow:
Air-fuel mixture in and exhaust gases out
Coolant to mix with oil
Pistons to move
Bearings to rotate
A multi-valve cylinder head (4 valves per cylinder) improves:
Fuel economy and airflow
Oil pressure
Compression only
Valve spring wear
An aluminum cylinder head is often used because it:
Is heavier and retains more heat
Dissipates heat better and weighs less
Seals better under pressure
Increases engine friction
