3-30.
A hydraulic pressure regulator
does which of the following?
1.
Maintains the system pressure
between two predetermined
levels
2.
Regulates the quantity of
fluid flow in the system
3.
Maintains the system pressure
above a predetermined
pressure level
4.
Maintains the system pressure
below a predetermined
pressure level
3-31.
Chatter of a pressure regulator
may be prevented by
1.
using a constant displacement
pump
2.
installing a snubber in the
fluid supply line
3.
maintaining a very small
differential pressure
4.
making cutout (closing)
pressure higher than cutin
(opening) pressure
REFER TO FIGURE 6-14 IN YOUR TEXTBOOK IN
ANSWERING QUESTIONS 3-32 AND 3-33.
3-32.
What is the operational state of
the regulator when the system
pressure is less than that
required to operate one of the
activating units in the system?
1.
The pilot valve is seated,
the check valve is unseated,
and fluid is flowing into the
system
2.
The pilot valve is unseated,
the check valve is seated,
and fluid is flowing into the
system
3.
The check valve is unseated,
the pilot valve is seated,
and fluid is flowing into the
return line
4.
The check valve is unseated,
the pilot valve is unseated,
and fluid is flowing into the
system and into the return
line
3-33.
3-34.
3-35.
For the pressure-controlled
sequence valve to operate
properly, the tension of the
spring must be sufficient to hold
the piston in the closed position
against pressure required to
operate the primary unit.
1.
True
2.
False
Refer to figure 617 in your
textbook.
Under what condition
does the valve operate as a
conventional check valve?
1.
Any time pressure in port A
is greater than the pressure
in port B
2.
Any time the pressures in
port A and port B are equal
3.
Only when the plunger is
depressed
4.
Only when the plunger is
released
Refer to figure 6-18 in your
textbook.
The valve decreases
fluid flow when which of the
following conditions exist(s)?
1.
The pressure in the outlet
port exceeds the adjusting
spring pressure
2.
The pressure in the inlet
port exceeds the pressure
desired in the outlet port
3.
The pressure on the valve
diaphragm moves the valve
stem up to close the valve
4.
All of the above
REFER TO FIGURE 6-19 IN YOUR TEXTBOOK IN
ANSWERING QUESTIONS 3-36 AND 3-37.
3-36.
If the input pressure of the
inlet port is less than the
setting of the pressure reducing
valve, what should be the
respective positions of the
poppet valve and the spool valve?
1.
Open, open
2.
Open, closed
3.
Closed, closed
4.
Closed, open
3-37.
A restriction in the drain would
cause the outlet port pressure to
1.
pulsate
2.
increase
3.
decrease
4. remain the same
19