3-48.
When the governor compensating
needle valve is correctly adjusted,
the engine will behave in which of
the following manners during load
changes?
1.
Maintain low underspeeds
2.
Maintain high overspeeds
3.
Return slowly to normal speeds
4.
Return quickly to normal speeds
3-49.
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
3-50.
The mechanical governor controls
the engine maximum 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.
Each of the above
3-51.
Which of the following is NOT a
cause of 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.
High lube oil temperature
3-52.
When you are in the process of
assembling a governor, which of the
following materials is recommended
for use on the sealing gasket?
1.
Shellac
2.
Hard grease
3.
Soft grease
4.
Lube oil
3-53.
An overspeed trip will stop a
diesel engine that is equipped with
a speed governor when the regular
speed governor fails to perform
which of the following actions?
1.
Limit the load on the engine
2.
Keep the engine within its
maximum designed limit
3.
Adjust to higher engine loads
4.
Reduce engine hunt
3-54.
A broken drive shaft of a hydraulic
overspeed trip will cause
uncontrolled engine speed because
the flyweights would
1.
disconnect from the shaft
2.
remain in the distended
position
3.
cease to exert centrifugal
force
4.
increase in rotative speed
3-55.
What controls the output of a
high-speed refrigeration
compressor?
1.
The box temperature
2.
The loading and unloading of
compressor cylinders
3.
The low-pressure switch
4.
The solenoid valve
IN ANSWERING QUESTION 3-56, REFER TO
FIGURE 5-3 OF THE TEXTBOOK.
3-56.
What will happen when an increase
in oil pump pressure causes the
piston of the capacity control
valve to move against spring A?
1.
More cylinders will become
loaded and the compressor
output will increase
2.
More cylinders will become
unloaded and the compressor
output will decrease
3.
The regulating valves will
relieve the oil pressure
4.
The compressor output will
remain the same
22