Question 1

What is the purpose of a diesel engine's glow plugs?

Accepted Answer

To heat the air inside the combustion chamber for easier ignition.

Answer

To control the amount of exhaust gases.

Answer

To increase fuel efficiency.

Answer

To reduce noise and vibration.

Question 2

What is the purpose of a turbocharger in a diesel engine?

Accepted Answer

To increase the amount of air supplied to the combustion chamber.

Answer

To reduce fuel consumption.

Answer

To increase the compression ratio.

Answer

To improve engine cooling.

Question 3

What is the compression ratio of a typical diesel engine?

Accepted Answer

Between 15:1 and 20:1.

Answer

Between 20:1 and 25:1.

Answer

Between 10:1 and 15:1.

Answer

Between 5:1 and 10:1.

Question 4

What is the purpose of the fuel injection system in a diesel engine?

Accepted Answer

To deliver and atomize fuel into the combustion chamber.

Answer

To increase the compression ratio.

Answer

To cool down the engine.

Answer

To regulate exhaust emissions.

Question 5

What is the function of the EGR (Exhaust Gas Recirculation) system in a diesel engine?

Accepted Answer

To reduce nitrogen oxide (NOx) emissions.

Answer

To reduce carbon dioxide (CO2) emissions.

Answer

To improve fuel efficiency.

Answer

To increase power output.

Question 6

What is the purpose of a diesel engine's fuel filter?

Accepted Answer

To remove impurities from the fuel.

Answer

To improve combustion efficiency.

Answer

To regulate fuel temperature.

Answer

To increase fuel pressure.

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