Chapter 19: Diesel Engine Operation and Diagnosis -Chapter Quiz 1. How is diesel fuel ignited in a warm diesel engine?
A. Glow plugs
B. Heat compression
C. Spark plugs
D. Distributor-less ignition system

2. Which type of diesel injection produces less noise?
A. Indirect injection (IDI)
B. Common rail
C. Direct injection
D. Distributor injection

3. Which diesel injection system requires the use of a glow plug?
A. Indirect injection (IDI)
B. High pressure common rail
C. Direct injection
D. Distributor injection

4. The three phases of diesel ignition include .
A. Glow plug ignition, fast burn, slow burn
B. Slow burn, fast burn, slow burn
C. Ignition delay, repaid combustion, controlled combustion
D. Glow plug ignition, ignition delay, controlled combustion

5. What fuel system component is used in a vehicle equipped with a diesel engine that is seldom used on the same vehicle when it is equipped with a gasoline engine?
A. Fuel filter
B. Fuel supply line
C. Fuel return line
D. Water-fuel separator

6. The diesel injection pump is usually driven by a .
A. Gear off the camshaft
B. Belt off the crankshaft
C. Shaft drive off of the crankshaft
D. Chain drive off of the camshaft

7. Which diesel system supplies high-pressure diesel fuel to all the injectors all of the time?
A. Distributor
B. Inline
C. High-pressure common rail
D. Rotary

8. Glow plugs should have high resistance when and lower resistance when .
A. Cold/warm
B. Warm/cold
C. Wet/dry
D. Dry/wet

9. Technician A says that glow plugs are used to help start a diesel engine and are shut off as soon as the engine starts. Technician B says that the glow plugs are turned off as soon as a flame is detected in the combustion chamber. Which Technician is correct?
A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technicians A NOR B

10. What part should be removed to test cylinder compression on a diesel engine?
A. An injector
B. An intake valve rocker arm and stud
C. An exhaust valve
D. A glow plug