What is pressure defined as? - CORRECT ANSWER-Force per unit area F=(P)(A)
This pressure gauge has a calibrated dial face with a pointer attached through
linkage to a plunger and a bias spring. This system pressure is connected to the
gauge and acts on the plunger.
a. bourdon tube
b. siphon
c. flow meter
d. schrader gauge - CORRECT ANSWER-d. schrader gauge
What job does a flow control valve perform in a hydraulic system? - CORRECT
ANSWER-Controls the volume of fluid entering a port of the system to vary the
speed
This is used in a hydraulic circuit as petroleum based liquid with 40% water content
which acts as oil
a. petroleum based oil
b. invert emulsions
c. glycol
d. vegtetable oils - CORRECT ANSWER-b. invert emulsion fluids
This is used as a fluid in a hydraulic circuit when there is extreme high and low
temperature ranges
a. petroleum based oil
b. invert emulsions
,c. glycol
d. synthesized hydrocarbons - CORRECT ANSWER-d. synthesized hydrocarbons
You would use this valve if a large amount of fluid is to be relieved under a small
pressure differential
a. PRV
b. sequencing valve
c. pilot operated relief vavle
d. unloading valve - CORRECT ANSWER-c. pilot operated relief vavle
This is a NC valve
What is the purpose of a relief valve in a hydraulic system? - CORRECT ANSWER-It
limits the maximum pressure in the system
Maintains maximum system pressure
Safety as well for system not over pressurizing
List four (4) purposes that hydraulic fluid serve in a hydraulic system. - CORRECT
ANSWER-a) Power transmission
b) Cooling
c) Sealing
, d) Lubrication
Describe cavitations and list four (4) causes of this problem.
1) Inlet not large enough
2) Plugged strainer
3) Viscosity too high
4) Too low operating temps or high operating temperatures
5) Over speed
6) Leaking system lines - CORRECT ANSWER-Cavitation is caused by restricted
flow to the suction side of pump. When oil is under pressure on discharge side of
pump, the air bubbles will implode.
This is a NC 2 way valve. It has a pilot lint that senses the pressure of the inlet port
and a line that drains the spring chamber back to reservoir (external drain)
a. PRV
b. sequencing valve
This pressure gauge has a calibrated dial face with a pointer attached through
linkage to a plunger and a bias spring. This system pressure is connected to the
gauge and acts on the plunger.
a. bourdon tube
b. siphon
c. flow meter
d. schrader gauge - CORRECT ANSWER-d. schrader gauge
What job does a flow control valve perform in a hydraulic system? - CORRECT
ANSWER-Controls the volume of fluid entering a port of the system to vary the
speed
This is used in a hydraulic circuit as petroleum based liquid with 40% water content
which acts as oil
a. petroleum based oil
b. invert emulsions
c. glycol
d. vegtetable oils - CORRECT ANSWER-b. invert emulsion fluids
This is used as a fluid in a hydraulic circuit when there is extreme high and low
temperature ranges
a. petroleum based oil
b. invert emulsions
,c. glycol
d. synthesized hydrocarbons - CORRECT ANSWER-d. synthesized hydrocarbons
You would use this valve if a large amount of fluid is to be relieved under a small
pressure differential
a. PRV
b. sequencing valve
c. pilot operated relief vavle
d. unloading valve - CORRECT ANSWER-c. pilot operated relief vavle
This is a NC valve
What is the purpose of a relief valve in a hydraulic system? - CORRECT ANSWER-It
limits the maximum pressure in the system
Maintains maximum system pressure
Safety as well for system not over pressurizing
List four (4) purposes that hydraulic fluid serve in a hydraulic system. - CORRECT
ANSWER-a) Power transmission
b) Cooling
c) Sealing
, d) Lubrication
Describe cavitations and list four (4) causes of this problem.
1) Inlet not large enough
2) Plugged strainer
3) Viscosity too high
4) Too low operating temps or high operating temperatures
5) Over speed
6) Leaking system lines - CORRECT ANSWER-Cavitation is caused by restricted
flow to the suction side of pump. When oil is under pressure on discharge side of
pump, the air bubbles will implode.
This is a NC 2 way valve. It has a pilot lint that senses the pressure of the inlet port
and a line that drains the spring chamber back to reservoir (external drain)
a. PRV
b. sequencing valve
