12-42.
An overheated wheel brake assembly
should be allowed to cool in the
ambient air for what prescribed
amount of time?
1.
45 to 60 min
2.
35 to 45 min
3.
30 to 40 min
4.
15 to 25 min
12-43.
The independent brake system
reservoir leakage test is
performed by connecting a source
of air to the filler port at what
prescribed pressure?
1.
25 psi
2.
30 psi
3.
35 psi
4.
50 psi
12-44.
To perform an operational test on
a power brake valve, you must have
a test stand capable of supplying
what minimum amount of hydraulic
pressure?
1500 psi
2000 psi
3000 psi
4500 psi
12-45.
When you are performing an
operational test on a power/manual
brake valve, the hydraulic fluid
must be within what prescribed
temperature range?
1.
40° to 90°F
2.
55° to 100°F
3.
70° to 110°F
4.
85° to 130°F
12-46.
Before disassembling a master
brake cylinder, what device should
you install on the end of the
piston rod to prevent personal
injury?
A nut
A clamp
A rig pin
A spring compressor
12-47.
During the reassembly of a master
brake cylinder, what type of
lubricant should you apply to the
suspension rod end bearing?
12-48.
Excessive heating of a shuttle
valve is an indication of what
problem?
1.
External leakage
2.
Internal leakage
3.
Defective emergency
accumulator
4.
Excessive cycling of the
emergency pump
12-49.
When performing a thermal crack
test on an automatic brake
adjuster valve, you should crack
the valve at what prescribed
pressure range?
1.
12 to 17 psi
2.
20 to 29 psi
3.
30 to 37 psi
4.
41 to 45 psi
12-50.
After disassembling a brake
selector valve you should clean
the parts in which of the
following substances?
Freon
Hydraulic fluid
Aliphatic naphtha
Dry-cleaning solvent
12-51.
During a bench test, what is the
maximum allowable torque required
to rotate the swivel?
1.
30 in.-lb
2.
40 in.-lb
3.
50 in.-lb
4.
60 in.-lb
IN ANSWERING QUESTION 12-52, REFER TO
FIGURE 12-47 IN THE TEXTBOOK.
12-52.
When the brakes are released, what
component prevents the piston from
returning to its original
position?
1.
The spring guide
2.
The adjusting pin
3.
The return spring
4.
The retaining ring
12-53.
The tapered grip method is used to
restrict the movement of the
captured torquing-type automatic
adjuster?
1.
Oil
2 .
Wax
3.
Grease
4.
Hydraulic fluid
True
False
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