Hydraulics Test 1 Exam, Most Recent Exam 2025/2026 Actual
Complete Real Exam Questions And Correct Answers
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What is installed on a micronic filter that idicates a clogged
filter? - ANSWER-
Differential pressure
indicator
To protect packing rings or seals from damage when it is
necessary to install
them over or inside threaded sections, the ______ -
ANSWER-Threaded
section should be covered with a
suitable sleeve
Which allows free fluid flow in one direction and no fluid
flow in the other
direction? - ANSWER-
Check valve
One of the distinguishing characteristics of an open-center
selector valve used
,in a hydraulic system is that _______ - ANSWER-Fluid flows
through the valve
in the OFF
position
The removal of air from an aircraft hydraulic system is
generally accomplished
____ - ANSWER-By operating the various hydraulic
components through
several
cycles
What is the purpose of using backup rings with O-Rings in
hydraulic systems
above 1,500 PSI? - ANSWER-Prevent high pressure from
extruding the seal
between the moving and
stationary part
A flexible sealing element subject to motion is a ____ -
ANSWER-Packing
If a rigid tube is too short for the flare to reach its seat before
tightening, pulling
it into place by tightening ______ - ANSWER-May
distort the flare
Extrusion of an O-ring seal is prevented in a high-pressure
system by the use of
, a _____ - ANSWER-Backup ring on the side of the O-ring
away from the
pressure
Generally, the first step in removing an accumulator from an
aircraft is to ____ -
ANSWER-Relieve the system
pressure
The internal resistance of a fluid which tends to prevent it from
flowing is called
what? - ANSWER-
Viscosity
Petroleum base hydraulic fluid is which color? - ANSWER-Red
Teflon hose that has developed a permanent set from being
exposed to high pressure or temperature should ____` -
ANSWER-Not be straightened or bent further
Hydraulic system thermal relief valves are set to open at a
____ - ANSWER-
Higher pressure than the system
relief valve
What steps should you take to check the air charge in a
hydraulic accumulator?
- ANSWER-Reduce all hydraulic pressure, then observe the
reading on the
Complete Real Exam Questions And Correct Answers
(Verified Answers) Already Graded A+ / Guaranteed
Success!! / Newest Exam / Just Released!!
What is installed on a micronic filter that idicates a clogged
filter? - ANSWER-
Differential pressure
indicator
To protect packing rings or seals from damage when it is
necessary to install
them over or inside threaded sections, the ______ -
ANSWER-Threaded
section should be covered with a
suitable sleeve
Which allows free fluid flow in one direction and no fluid
flow in the other
direction? - ANSWER-
Check valve
One of the distinguishing characteristics of an open-center
selector valve used
,in a hydraulic system is that _______ - ANSWER-Fluid flows
through the valve
in the OFF
position
The removal of air from an aircraft hydraulic system is
generally accomplished
____ - ANSWER-By operating the various hydraulic
components through
several
cycles
What is the purpose of using backup rings with O-Rings in
hydraulic systems
above 1,500 PSI? - ANSWER-Prevent high pressure from
extruding the seal
between the moving and
stationary part
A flexible sealing element subject to motion is a ____ -
ANSWER-Packing
If a rigid tube is too short for the flare to reach its seat before
tightening, pulling
it into place by tightening ______ - ANSWER-May
distort the flare
Extrusion of an O-ring seal is prevented in a high-pressure
system by the use of
, a _____ - ANSWER-Backup ring on the side of the O-ring
away from the
pressure
Generally, the first step in removing an accumulator from an
aircraft is to ____ -
ANSWER-Relieve the system
pressure
The internal resistance of a fluid which tends to prevent it from
flowing is called
what? - ANSWER-
Viscosity
Petroleum base hydraulic fluid is which color? - ANSWER-Red
Teflon hose that has developed a permanent set from being
exposed to high pressure or temperature should ____` -
ANSWER-Not be straightened or bent further
Hydraulic system thermal relief valves are set to open at a
____ - ANSWER-
Higher pressure than the system
relief valve
What steps should you take to check the air charge in a
hydraulic accumulator?
- ANSWER-Reduce all hydraulic pressure, then observe the
reading on the
