Items 3–36 through 3–38 are related
o
to figure 3B.
3–36.
If the weight on the large piston
just balances the weight on the
small piston, it follows that the
1.
2.
3.
4.
3-37. If
force per unit of area is the
same on both pistons
weights on the two pistons are
equal
force on the large piston
equals that on the small piston
pressure is greater below the
small piston than it is below
the large piston
a certain force is applied to
the small piston, what are the
relationships between pressures in
various parts of the system?
1.
The pressure on the small
piston is greater than the
pressure on the large piston
2.
The pressure on the small
cylinder is the same as the
pressure acting against the
small piston and is greater
than the pressure in the large
cylinder
3.
The pressure in the connecting
tube is the same as the
pressure in the small cylinder
and is greater than the
pressure in the large cylinder
4.
The pressure is the same on all
parts of all surfaces that
enclose the liquid
3–38.
Let FI be the force applied to the
small piston and F2 be the force
exerted by the large piston.
Which
equation represents the
relationship between the forces FI
and F??
3–39.
The area of the small piston in a
hydraulic press is 3 square inches
and the area of the large piston is
75 square inches.
If a force of 50
pounds is applied to the small
piston, the large piston will
(neglecting frictional losses)
exert a force of
1.
25 lb
2.
250 lb
3.
725 lb
4.
1,250 lb
3–40.
In a hydraulic press, how does the
distance the small piston moves
compare with the distance the large
piston moves?
1.
The small piston will always
move a greater distance than
the large piston
2.
The large piston will always
move a grater distance than the
small piston
3.
Both pistons will move the same
distance
4.
There is no relationship
between the movements of the
two pistons
Items 3–41 and 3–42 are related to
o
the hydraulic press shown in
textbook figure 10–10.
3–41.
What is the main function of the
check valves?
1.
To prevent the liquid from
escaping from the large
cylinder into the reservoir
2.
To prevent the liquid in the
reservoir from flooding the
small cylinder
3.
To make possible several short
strokes, instead of one long
stroke, with the small piston
4.
To allow the large piston to
return to its starting position
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