2-9.
Which of the following agents, if
combined with minute amounts of
water found in operating
hydraulic systems, does NOT
change into hydrochloric acid?
1.
An approved dry-cleaning
solvent
2.
Trichlorotrifluoroethane
3.
Chlorinated solvents
4.
Trichlorofluoromethane
2-10.
When you analyze operating
hydraulic fluids, changes in
which of the following areas may
be of particular interest to you?
1.
Chemical properties
2.
physical properties
3.
particulate contamination
4.
Any of the above
2-11.
From which of the following
locations can fluid samples be
taken?
1.
Filter bowls
2.
Tops of tanks
3.
Pipe drains after sufficient
fluid has drained
4.
Each of the above
Learning Objective:
Indicate
functions, operating
characteristics, and related data
pertinent to hydraulic pumps.
2-12.
Which of the following is the
function of a hydraulic pump?
1.
To provide flow to the
hydraulic system
2.
To create the pressure
required in a hydraulic
system
3.
To control the pressure
required in a hydraulic
system
4.
To compensate for atmospheric
pressure at varying altitudes
2-13.
If a hydraulic pump is located
below the reservoir, fluid is
supplied to its inlet port by
which of the following forces?
1.
Fluid head
2.
Gravity
3.
Atmospheric pressure
4.
A combination of all of the
above
2-14.
The ratings of most hydraulic
pumps are determined by their
1.
efficiency
2.
output per unit time
3.
volumetric output at a given
pressure
4.
amount of internal slippage
2-15.
Pump performance can be expressed
in which of the following terms?
1.
Gallons per minute
2.
Cubic inches per revolution
3.
Both 1 and 2 above
4.
Cubic feet per minute
2-16.
In contrast to a nonpositive-
displacement pump that can
operate with its discharge outlet
completely restricted, a
positive-displacement pump cannot
do so and must be used with a
pressure regulator.
1.
True
2.
False
Learning Objective:
Identify
operating principles and
construction features of rotary
pumps
2-17.
Slippage is the term given to the
amount of fluid that can return
from the discharge side to the
suction side of a rotary pump
through the space or clearances
between the stationary and moving
parts.
1.
True
2.
False
2-18.
Which of the following is
generally the basis for rotary
pump classification?
1.
Type of drive
2.
Shaft position
3.
Service application
4.
Type of rotating element
2-19.
What type of gears is illustrated
in figure 4-1 of your textbook?
1.
Spur
2.
Helical
3.
Crescent
4.
Herringbone
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