Questions 9-55 through 9-58 concern the
hydraulic servovalve shown in textbook
figures 9-4 and 9-5.
9-55.
The feedback signal which sets in motion
the fine control required to actuate the
servovalve may be produced by which of
the following means?
1.
Electricity
2.
Fluid pressure
3.
Mechanical links
4.
All of the above
9-56.
What will the magnetic reed do when the
input signal matches the feedback signal
to the amplifier?
1.
It starts to vibrate
2.
It returns to neutral
3.
It blocks the right nozzle
4.
It blocks the left nozzle
9-57.
When the left solenoid is energized, in
what direction does the reed move and
what action of the spool valve results?
1.
The reed moves right and the spool
valve moves left
2.
The reed moves left and the spool
valve moves right
3.
Both the reed and the spool valve
move to the left
4.
Both the reed and the spool valve
move to the right
9-58.
The spool valve is returned to a central
position by spring action when the fluid
pressure is relieved through which of the
following chambers?
1. A
2. B
3. C
4. D
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