4-18.
What type of air dehydrator is used
to reduce dust problems produced by
the other various types?
1.
Refrigeration (type I)
2.
Desiccant (type II)
3. Activated alumina beads
4.
Combination refrigeration and
desiccant (type III)
4-19.
Which of the following statements
is correct about the dehydrator dew
point readings?
1.
They are taken only to verify
suspected operational problems
2.
They are taken every 8 hours of
dehydrator service
3. They are taken as required by
the PMS
4.
They are taken every 4 hours of
dehydrator service
4-20.
Which of the following statements
describes the recommended
procedures for cleaning an
oil-wetted filter element that was
removed from a compressor intake?
1.
Clean with gasoline or
kerosene, dip in lightweight
oil, and drain excess oil
2.
Clean with steam or strong sal
soda solution, dip in clean
medium viscosity oil, and drain
excess oil
3. Clean with a jet of hot water,
dip in kerosene, and drain
excess kerosene
4.
Clean with kerosene, drain
excess kerosene, dip in medium
viscosity oil. and drain excess
oil
4-21.
Leakage through the discharge
valves of an air compressor is
usually caused by which of the
following factors?
1.
Dirt in the valves
2.
Moisture in the air
3. Overcompression of air in the
cylinders
4.
Insufficient compression of air
in the cylinders
4-22.
Carbonized air compressor valves
should be cleaned by soaking them
in which of the following solvents?
1.
Gasoline
2.
Solution of kerosene and
mineral oil
3. Kerosene only
4.
Strong soda solution
4-23.
When you are inserting valves in a
compressor cylinder, in which of
the following directions should the
(a) discharge valves and (b)
suction valves open?
1. (a)
(b)
2.
(a)
(b)
3.
(a)
(b)
4.
(a)
(b)
Toward the center;
away from the center
Away from the center of the
cylinder;
toward the center
Toward the center of the
cylinder;
toward the center of the
cylinder
Away from the center of the
cylinder;
away from the center of the
cylinder
4-24.
What material is used to repack the
filter of air compressor control
valves?
1.
Wool
2.
Cotton
3. Linen
4.
Nylon
4-25.
Which of the following valves of a
compressed air system is vital for
its safe operation?
1.
Control
2.
Discharge
3.
Suction
4.
Relief
4-26.
Which of the following checks is
NOT a requirement during an
inspection of a washing machine?
1.
Test for correct steam pressure
2.
See that the bolts, nuts, and
screws are tight
3.
Ensure the machine is level
4.
See that the latches on the
cylinder doors work properly
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