questions with correct answers
The best way to protect a pressure gauge from pressure surges is by
A. installing a shutoff valve.
B. disconnecting the gauge.
C. installing a plug valve.
D. using a snubber with the gauge. Correct Answer-D. using a snubber
with the gauge.
Hydraulic lines should NEVER be constructed of
A. galvanized pipe.
B. Teflon-lined hose.
C. tubing.
D. black steel pipe. Correct Answer-A. galvanized pipe.
The purpose of a bypass line around a system filter is to
A. regulate pressure.
B. allow passage of flow in case of emergency.
C. offer less resistance to flow than bushings.
D. require less space than bushings. Correct Answer-B. allow passage of
flow in case of emergency.
If a cylinder has an input pressure of 50 psi and the BLANK SIDE of the
piston is 5 sq. inches, how much total force is applied by the piston?
,A. 5 lbs.
B. 10 lbs.
C. 50 lbs.
D. 250 lbs. Correct Answer-D. 250 lbs.
A 40% pressure drop across an oil filter screen indicates that the
A. screen is broken.
B. line pressure is too low.
C. screen is dirty.
D. line pressure is too high. Correct Answer-C. screen is dirty.
An air-breather is installed on a fluid reservoir to
A. allow overflow.
B. cool the oil.
C. vent the reservoir.
D. control air pollution. Correct Answer-C. vent the reservoir.
Which best describes the piston surface area of a single-rod, double-
acting piston?
A. Spring-loaded
B. Unequal
C. Equal
D. Balanced Correct Answer-B. Unequal
,What kind of valve allows flow in only one direction?
A. Needle
B. Check
C. Gate
D. Globe Correct Answer-B. Check
Pressure on a fluid is
A. higher at the inlet.
B. distributed equally in the fluid.
C. lower than input pressure.
D. higher than input pressure. Correct Answer-B. distributed equally in
the fluid.
Shutting the fluid discharge of an air-operated reciprocating pump will
cause the pump to
A. reverse direction.
B. lift the relief valve.
C. overstroke.
D. stall. Correct Answer-C. overstroke.
The main difference between pneumatic cylinders and hydraulic
cylinders is that hydraulic cylinders
A. are more easily repaired.
, B. require return lines.
C. are lighter in weight.
D. have a greater size selection. Correct Answer-B. require return lines.
Peak hydraulic system demands may be met by the use of
A. an accumulator.
B. a dual system.
C. a large reservoir.
D. an oversize pump. Correct Answer-A. an accumulator.
Air leaving the exhaust port of a four-way valve is directed to the
A. Aftercooler.
B. Atmosphere.
C. receiver.
D. Compressor. Correct Answer-B. Atmosphere.
In troubleshooting a pneumatic system, you should first check
A. the air supply.
B. the solenoid valve.
C. for blown fuses.
D. For leaking cylinders. Correct Answer-A. the air supply.
The speed of a piston is determined by the