Diesel Quiz 3

1.  Too much oil in the crankcase will cause?
a. foaming and loss of power.
b. hydraulic lock and damaged bearings.
c. engine surging.
d. no harm, the more oil, the better.

2. White smoke on a cold start up of a diesel is a sign of what?
a. shrunken valve stems in valve guides allowing oil to pass.
b. water in the exhaust pipe.
c. unburned fuel.
d. worn piston rings.

3.  Black smoke on a warm start up is?
a. overfueling due to lack of air.
b. air in the injectors.
c. lack of fuel to the injection pump.
d. carbon in the exhaust pipe.

4.  In an emergency situation, which would you do first to shut a diesel down if you had all these options?
a. shut the fuel off.
b. release the compression.
c. shut the air off.
d. unhook the battery.

5.  A good indication of engine blow-by is?
a. high oil temp.
b. low oil temp.
c. high water temp.
d. low water temp.

6.  An engine equipped with a compression release has this feature for starting a cold engine, and what other main reason?
a. shifting gears.
b. operating a downgrade.
c. adjusting injectors and valves.
d. let oil psi increase.

7.  A pyrometer measures?
a. oil temp.
b. water temp.
c. intake air temp.
d. exhaust temp.

8.  STP oil treatment in an engine will?
a. double engine wear life.
b. cause excessive carbon build up.
c. decrease oil psi.
d. clean injectors.

9.  The time between fuel injection and fuel ignition is known as what?
a. ignition time.
b. detonation.
c. ignition lag.
d. pre-combustion.

10.  Which of the following is the most important property of a diesel fuel?
a. viscosity.
b. gravity.
c. cloud point.
d. cleanliness.








answers: a,c,a,b,a,c,d,b,c,d.

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