5-50.
When you are using a portable
hydraulic test stand during an
aircraft operation, the bypass
control should be in what position?
1.
Half opened
2.
Fully closed
3.
Fully opened
4.
Adjusted to operating pressure
5-51.
During shutdown, before the
throttle of an engine-driven
portable hydraulic test stand is
pushed completely closed, the
engine should run at 1000 rpm for
approximately how many minutes?
1.
1 min
2.
5 min
3.
10 min
4.
12 min
5-52.
You can accomplish simultaneous
multisystem operational checks on
an aircraft by using which of the
following methods?
1.
By attaching a T-fitting
between the aircraft system’s
main selector valve
2.
By using separate hydraulic
test stands for each aircraft
system
3.
By manifolding two or more
aircraft systems to a common
test stand
4.
Both 2 and 3 above
5-53.
The test chamber of the HCT-10
stationary hydraulic test stand is
constructed from what material?
1.
A l/4-inch steel plate
2.
A l/2-inch steel plate
3.
A l/2-inch aluminum plate
4.
A 7/8-inch aluminum plate
5-54.
When testing double-acting
hydraulic cylinders on an HCT-10
test stand, which, if any, of the
following test circuits should you
use?
1.
Pump
2.
Static
3.
Dynamic
4.
None of the above
5-55.
Air in a hydraulic system generates
no problem as long as it remains in
what state?
1. Free
2.
Filtered
3.
Dissolved
4.
Entrained
5-56.
When free air enters a fluid at a
very high rate, the rapid collapse
of bubbles generates extremely high
local fluid velocities that are
converted into impact pressures.
What is this phenomenon known as?
5-57.
To facilitate the removal of free
air, what components are sometimes
provided at high points in the
aircraft hydraulic circulatory
system?
1.
Check valves
2.
Filler valves
3.
Restrictor valves
4.
Air bleed valves
5-58.
While operating a hydraulic test
stand, it appears that you have a
loaded filter.
At what point
should you terminate operation of
the test stand?
Immediately
Within 15 minutes of the
indication
When you complete the
operational check
After the fluid has cycled
enough to allow the temperature
to drop below 85°F
5-59.
Age-controlled, deteriorative-type
hoses used to carry hydraulic fluid
in SE units should NOT remain in
service for more than what maximum
number of years beyond the
manufacturer’s cure date?
1.
5 yr
2.
6 yr
3.
7 yr
4.
8 yr
5-60.
Prior to hydraulic fluid sampling,
SE must be run for what minimum
length of time?
1.
5 min
2.
7 min
3.
10 min
4.
15 min
5-61.
After flushing the fittings on SE,
you should open the reservoir drain
valve and allow approximately what
amount of fluid to drain into a
waste receptacle?
1. 1 pint
2.
1 quart
3.
1/2 gallon
4.
1 gallon
26
