4-34.
4-35.
4-36.
4-37.
Learning Objective:
Recognize
the types of fluid power
actuating devices and identify
construction features, uses, and
operating characteristics of
various types of actuating
cylinders.
What component of a fluid power
system converts fluid power into
mechanical force and motion?
1.
Pump
2.
Valve
3.
Actuator
4.
Solenoid
What actuating devices are
commonly used in fluid power
systems?
1.
Turbines
2.
Motors
3.
Cylinders
4.
All of the above
A cylinder is identified as a ram
type if its
1.
piston rod diameter is less
than one-half of the diameter
of the piston
2.
piston rod area is less than
On-half the area of it
3.
area is more than one-half of
the area of the piston rod
4.
piston rod cross-sectional
area exceeds one-half of the
cross-sectional area of the
piston
Ram-type sinqle-acting cylinders
are designed for which type of
functions?
1.
Push functions where springs
assist the functions
2.
Pull functions where springs
assist the functions
3.
Push functions where return
action depends on springs or
gravity
4.
Pull functions where return
action depends on springs or
gravity
4-38.
4-39.
Four-way control valves are
normally used to control the
actions of the
1.
singleacting ram
2.
double-acting ram
3.
sinqle-acting ram through two
ports
4.
doubleacting ram using equal
pressure on all valve
surfaces
Refer to figure 10-2 of your
textbook.
Why does the extension
stroke exert a greater force than
the retraction stroke?
1.
The pressure is much greater
for the extension stroke
2.
The bottom of the ram has a
larger surface area than the
lip
3.
Both pressure and surface
area are greater for the
extension stroke
4.
The extension stroke is
usually assisted by gravity
IN QUESTIONS 4-40 THROUGH 4-42 SELECT
FROM COLUMN B AN APPLICATON OF EACH
TYPE OF ACTUATING CYLINDER LISTED IN
COLUMN A.
A. CYLINDER TYPES
B. APPLICATIONS
4-40.
Sinqleacting.
1.
Dump trucks
spring-loaded
piston
2.
Ships steer.
ing systems
4-41.
Telescoping ram
3.
Anchor wind-
4-42.
Dual ram
lass
4.
Carrier air-
craft arrest-
ing hooks
4-43.
The piston-type cylinder has a
cross-sectional area that
measures more than twice the
cross-sectional area of its
piston rod.
1.
True
2.
False
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