Questions 4-65 and 4-66 are to be judged
True or False.
4-65.
To maintain the proper oil level in the
engine governor, you may use lubricating
oil from the main diesel engine
crankcase.
4-66.
Foaming of the oil indicates presence of
water in an engine governor.
4-67.
When the governor compensating needle
valve is correctly adjusted, how should
the engine behave during load changes?
1.
Maintain low underspeeds
2.
Maintain high overspeeds
3.
Return slowly to normal speeds
4.
Return quickly to normal speeds
4-68.
An increase in load for any constant
throttle setting of a mechanical governor
will be accompanied by a decrease in
1.
engine speed
2.
spring length
3.
fuel pressure
4.
oil temperature
Question 4-69 is to be judged True or
False.
4-69.
Hydraulic rather than mechanical gover-
nors are used where extremely accurate
engine speed regulations are required.
4-70.
What type of governor is designed to hold
the predetermined operating speed of a
diesel engine generator set?
1.
Load-limiting
2.
Variable-speed
3.
Speed-limiting
4.
Constant-speed
4-71.
The mechanical governor controls engine
idling speed when the centrifugal force
of both sets of flyweights act against
which of the following parts?
1.
The buffer spring
2.
The light spring
3.
The heavy spring
4.
All of the above
4-72.
4-73.
4-74.
4-75.
Which of the following conditions may
cause an improper speed fluctuation of an
engine equipped with a mechanical
governor?
1.
Constantly changing loads
2.
Misfiring engine cylinders
3.
A binding governor linkage
4.
Each of the above
An overspeed trip will stop a diesel
engine that is equipped with a speed
governor when the regular speed governor
fails to
1.
limit the load on the engine
2.
keep the engine within its maximum
designed limit
3.
operate
4.
reduce engine hunt
Question 4-74 is to be judged True or
False.
Prior to testing the engine overspeed
trip, the accuracy of the engine tacho-
meter should be checked for proper opera-
tion as required by the manufacturer's
instructions.
A broken drive shaft of a hydraulic
overspeed trip will cause uncontrolled
engine speed because the flyweights
1.
disconnect from the shaft
2.
remain in a distended position
3.
cease to exert centrifugal force
4.
increase in rotative speed
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