LESSON 1
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
B.
Square inch.
In the United States the square inch is the measurement used
when expressing applied force to an area. (Page 5)
2.
B.
It increases in size.
Temperatures have an effect on liquids. Applied heat causes
liquids to expand slightly, while cold has the opposite
effect. (Page 11)
3.
D.
Practically all.
A hydraulic system is very efficient. There is virtually no
loss except that which may be in the mechanical linkage.
(Page 3)
4.
A.
Pressure exerted can be determined by dividing force by area.
(Page 6)
5.
D.
Lowest pressure.
Fluid flows toward the area of least resistance.
(Page 11)
6.
B.
Air and pure nitrogen.
Using the
wrong combination of gases could cause an
explosion.
You should use only air and pure nitrogen. (Page
13)
7.
B.
Two.
You may use either vegetable-base or mineral-base hydraulic
fluids; however, you must not mix them or switch from one to
the other. (Page 14)
22
AL0907
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