2-37.
Automatic variation of the volume
output of a variable-displacement
Stratopower pump is controlled by
which of the following factors?
1.
Atmospheric pressure
2.
Reciprocating action of the
pistons
3.
The position of the rocker
arm on the shaft
4.
The pressure in the hydraulic
system
2-38.
During nonflow operation of a
variable-displacement Stratopower
pump, what provides its
lubrication?
1.
Compensator spring
2.
Compensator piston
3.
Bypass system
4.
Drive cam
Learning Objective:
Indicate
basic requirements for fluid
power system lines and
connectors,
and recognize
pertinent facts concerning
identification, sizing, uses, and
construction of pipe and tubing.
2-39.
You must consider which of the
following factors when selecting
the types of fluid lines for a
particular fluid power system?
1.
The required pressure of the
system
2.
The type of fluid medium
3.
The location of the system
4.
All of the above
2-40.
You must give primary
consideration to all but which of
the following factors in
selecting the lines for a
particular fluid power system?
1.
The type of material
2.
The materials wall thickness
3.
The materials inside
diameter
4.
The materials outside
diameter
2-41.
Replacement of a piece of tubing
with one having a smaller inside
diameter will result in which of
the following conditions?
1.
Fluid heating
2.
Turbulent fluid flow
3.
System power loss
4.
All of the above
2-42.
Which,
if any, of the following
statements is true for pipes of
the same nominal size?
1.
As the pipe schedule size
increases,
the ID remains the
same and the wall thickness
and OD increase
2.
As the pipe schedule size
increases,
the ID increases ,
the wall thickness decreases,
and the OD remains the same
3.
As the pipe schedule size
increases,
the ID decreases,
the wall thickness increases,
and the OD remains the same
4.
None of the above
REFER TO TABLE 5-1 IN YOUR TEXTBOOK IN
ANSWERING QUESTIONS 2-43 AND 2-44.
2-43.
The nominal size of pipe whose
outside diameter is 1.900 inches
is
1.
1 1/2
2.
1 3/4
3.
2
4.
2 1/4
2-44.
What is the schedule 40 wall
thickness of pipe with a nominal
pipe size of 2 inches?
1.
0.154 In.
2.
0.218 in.
3.
0.308 in.
4.
0.436 in.
2-45.
What is the size of No. 4 rigid
tubing , and where is the
measurement taken?
1.
0.004 inch, wall thickness
2.
0.040 inch, wall thickness
3.
4/16 inch, inside diameter
4.
1/4 inch, outside diameter
13