4-45.
Which of the following indicators
suggest(s) improper drainage of the
distiller condenser?
1.
The flash chamber gauge line is
flooded
2.
The first-effect tube nest
vacuum is several inches of
mercury
3. The plant does not produce the
designed output when the
orifice is 5 psig
4.
Each of the above
4-46.
All sources of troubles in
electrohydraulic systems fit into
one of three categories.
Which of
the following is NOT a category?
1.
Hydraulic
2. Cooling
3. Electrical
4. Mechanical
4-47.
What is the recommended method for
locating small internal leaks in
hydraulic systems?
1.
Use magnetic flux
2.
Install pressure gauges
3. Listen for identifying sounds
4. Visually inspect the
disassembled parts
4-48.
A popping or sputtering noise in a
hydraulic system indicates which of
the following conditions?
1.
An oil leak in the pressure
line
2.
An air leak in the pressure
line
3. An air leak in the suction line
4. An air pocket in the cylinder
4-49.
Which of the following conditions
should you suspect if a pounding or
rattling noise occurs in a
hydraulic system?
1. Overtight adjustment of parts
2. Defective spring-activated
valve
3. Improperly adjusted relief
valve
4.
Overloaded system or high-speed
operation
4-50.
Foreign matter in the oil of a
hydraulic transmission usually
causes which of the following types
of noise?
1.
Rattling
2.
Popping
3. Squealing
4.
Grinding
4-51.
When a squealing or squeaking noise
occurs in a hydraulic system, it is
usually caused by which of the
following conditions?
1. Wiped bearings
2. Air pocket in the cylinder
3. Overtight packing around moving
parts
4.
Overloaded system during high-
speed operation
4-52.
What should you, as an Engineman,
do upon discovering a faulty
operation of a circuit breaker of a
hydraulic system?
1.
Repair the circuit breaker
2.
Check for excessive binding in
the electric motor
3. Replace any damaged equipment
in the plant
4.
Report the condition to the
Electrician's Mate
4-53.
If a hydraulic system is left to
idle for a long period of time,
which of the following difficulties
might you expect to develop?
1. Misalignment of linkage
2. Accumulation of sludge
3. External leakage
4.
Internal leakage
4-54.
What is the purpose of securing a
hydraulic system for 1 hour after
filling it with clean oil?
1.
To permit the settling of
foreign matter
2. To dissolve the sludge
3. To permit the venting of air
4. To dissolve corrosive deposits
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