What effect does turbocharging have on power?

Increases air intake and engine output

The purpose of the crankshaft is to:

Convert reciprocating motion to rotary

Diesel engines have higher compression ratios than gasoline engines because:

they compress only air to a higher ratio, generating enough heat to ignite fuel without a spark

they operate at lower temperatures.

they have a more complex design.

What are the four strokes of the diesel engine cycle?

Suction, Compression, Ignition, Exhaust

Intake, Combustion, Power, Release

Suction, Combustion, Power, Release

The purpose of the camshaft in a diesel engine is to:

control the timing of the engine's valves

increase the engine's fuel efficiency

Diesel engines do not require spark plugs because:

They ignite fuel with heat from compressed air, not a spark

They have a built-in spark generator.

They do not require any form of ignition.

They use electric ignition instead.

Combustion in a diesel engine happens when:

the fuel is injected into the combustion chamber and ignited by the heat of compressed air.

the air-fuel mixture is ignited by a spark plug.

the fuel is mixed with air before being injected into the combustion chamber.

the engine reaches a certain temperature and ignites the fuel automatically.

Bottom dead center (BDC) in engine cycles refers to:

The lowest point of the piston in the cylinder

The highest point of the piston in the cylinder

The point where the piston is halfway in the cylinder

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

What would happen if the intake valve failed to open?

The engine would produce more power.

Torque is different from horsepower in that it measures:

the rotational force of an engine

the fuel efficiency of an engine

Brake-specific fuel consumption (BSFC) measures:

the fuel efficiency of an engine design

the emissions produced by an engine

Engine RPM affects horsepower output by:

Increasing RPM generally increases horsepower until a certain point.

Decreasing RPM always increases horsepower.

RPM has no effect on horsepower.

Horsepower decreases as RPM increases.

The turbocharger plays a role in improving engine efficiency by:

increasing air intake and combustion efficiency

The piston and crankshaft work together to:

convert linear motion to rotational motion

convert rotational motion to linear motion

increase the speed of the engine

decrease the engine's temperature

What happens if the timing gears are out of alignment?

The engine may misfire or not run properly.

Diesel Engine Systems Test Review

Authored by Kristi Costello

Other

12th Grade

Used 9+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Diesel engines rely on:

Spark ignition

Compression ignition

Electric ignition

External combustion

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What component is responsible for compressing air in the cylinder?

Fuel injector

Turbocharger

Piston

Camshaft

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which stroke in the four-stroke cycle is when fuel is injected?

Intake

Compression

Power

Exhaust

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a function of the intake valve?

Expel gases

Start ignition

Allow air in

Mix fuel and air

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Diesel fuel is injected at:

Top dead center

Bottom dead center

During intake

After the power stroke

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is typically used for the engine block?

Aluminum

Plastic

Cast iron

Copper

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does TDC stand for?

Timing diesel compression

Top diesel cycle

Top dead center

Turbo diesel cycle

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Diesel Engine Systems Test Review

Diesel engines rely on:

What component is responsible for compressing air in the cylinder?

Which stroke in the four-stroke cycle is when fuel is injected?

Which of the following is a function of the intake valve?

Diesel fuel is injected at:

Which of the following is typically used for the engine block?

What does TDC stand for?

In the four-stroke cycle, how many crankshaft revolutions complete one cycle?

What determines engine displacement?

What is the typical compression ratio range for a diesel engine?

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