Engine Maintenance

Chapter 4 - Quiz

Engine Maintenance

1. The compression of air in a diesel engine causes the:

a. temperature to decrease.b. exhaust valve to open.c. temperature to rise.d. exhaust valve to close.

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Engine Maintenance

2. The diesel engine develops power by __________ fuel.

a. burningb. explodingc. compressingd. expanding

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Engine Maintenance

3. To achieve effective combustion in a diesel engine three independent factors must take place. There must be an adequate supply of:

a. fuel, the diesel fuel must be atomized, and the fuel must be thoroughly filtered.

b. oxygen, the oxygen must be atomized, and an adequate supply of diesel fuel.

c. oxygen, the diesel fuel must be atomized, and the diesel fuel must be thoroughly mixed with oxygen.

d. fuel, an adequate supply of oxygen, and the oxygen must be thoroughly atomized. 4

Engine Maintenance

4. The limiting factor in how much fuel a diesel engine can burn is the ability to get a sufficient quantity of:

a. fuel into the engine's cylinders.b. air into the engine's cylinders.c. compression out of the engine's

cylinders.d. exhaust gases out of the engine's

cylinders.5

Engine Maintenance

5. The purpose of the turbocharger is to:

a. drive fuel into the cylinders.b. increase the compression ratio.c. drive compressed air into the

cylinders.d. increase the flow of exhaust gases.

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Engine Maintenance

6. The down side of using a turbocharger is that it:

a. raises the air temperature.b. raises the fuel temperature.c. lowers the air temperature.d. lowers the fuel temperature.

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Engine Maintenance

7. In the diesel engine, fuel is:

a. not mixed with oxygen before combustion.

b. mixed with oxygen before combustion.

c. super heated before combustion.d. cooled before combustion.

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Engine Maintenance

8. An intercooler is simply a heat exchanger fitted in the:

a. oil supply.b. fuel supply.c. raw water supply.d. air supply.

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Engine Maintenance

9. Modern diesel fuel injection systems can be divided into two basic systems, the:

a. indirect and distributor pump systems.

b. direct and distributor pump systems.

c. indirect and direct injection systems.

d. rail and unit injection systems.10

Engine Maintenance

10.The difference between the unit injection system and the rail injection system is that the rail system:

a. injects fuel directly into the cylinders.

b. stores a reservoir of fuel at high pressure.

c. combines the fuel pump and injector in one unit.

d. has a dedicated pump for each cylinder.

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Engine Maintenance

11.The unit injection system has a:

a. combined pump and injector for each cylinder.

b. single high pressure fuel pump that feeds each cylinder.

c. fuel pump with rotating heads that sends fuel to each cylinder.

d. jerk pump for each cylinder.

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Engine Maintenance

12.Obtaining a constant diesel engine speed is achieved by the use of a:

a. control sleeve.b. governor.c. throttle.d. speeder spring.

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