3-18.
If the water in the cooling system
of a diesel emergency generator
overheats because the thermostat
fails to function, what corrective
action should you take?
1.
Clean the bellows of the
element
2.
Adjust the tension of the
regulator spring
3.
Clean the freshwater cooler
4.
Replace the thermostat
3-19.
In the Fulton-Sylphon automatic
temperature regulator, what happens
if you decrease the spring tension?
1.
The velocity of the cooling
water decreases
2.
The temperature range of the
regulator increases
3.
The temperature range of the
regulator decreases
4.
The velocity of the cooling
water increases
3-20.
Which of the following troubles in
the engine exhaust system will
cause back pressure?
1.
Obstruction in the combustion
space
2.
Thermostat failure
3.
Restricted exhaust
4.
Restricted oil filter
3-21.
After being cleaned, most oil
bath-type engine air cleaners
should be refilled to what level?
1.
To the full mark
2.
Slightly above the full mark
3.
To the halfway mark
4.
Slightly less than the halfway
mark
3-22.
Which of the following conditions
can damage the turbine blading of a
turbocharger?
1.
Foreign objects
2.
Bearing failure
3.
Overspeeding
4.
Each of the above
3-23.
Which of the following conditions
will NOT cause scoring of blower
parts?
1.
Dirty lube oil
2.
Worn gears
3.
Improper timing
4.
Improper end clearance
3-24.
How can you determine whether
blower rotor gears are worn
excessively?
1.
Measure the clearance between
the leading and the trailing
edges of the rotor lobes
2.
Measure the backlash of the
gear set
3.
Measure the clearance between
the rotor lobes and the casing
4.
Check the timing of the rotors
3-25.
Which of the following conditions
is a major contributing factor to
diesel engine power loss, starting
failure, and frequent stalling?
1.
High cooling water temperature
2.
Faulty operation of the
governor
3.
Improperly engaged jacking gear
4.
Faulty air-starting distributor
3-26.
If you are checking an engine for a
stuck fuel control rack, what
should you do immediately after
disconnecting the linkage to the
governor?
1.
Visually inspect the rack
2.
Try to move the rack by hand
3.
Test the return springs
4.
Clean the removed rack
3-27.
A leaking fuel injector may cause
an engine to
1.
stop
2.
overheat
3.
operate better
4.
continue to operate when you
attempt to shut it down
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