True/False
Indicate whether the
statement is true or false.
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1.
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The purpose of an actuator in a hydraulic circuit is to supply the input power
to the pump?
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2.
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The difference between a single acting cylinder and a double acting cylinder is
that double acting cylinders are capable of producing force in each direction using pressure on each
side of the piston, while single acting on applies pressure on one side of the piston.
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3.
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Tandem cylinders are used over standard cylinders when a large amount of force
is required.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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4.
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Assuming a constant flow rate, will a double acting cylinder travel fasater on
the extended or retracted stroke?
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5.
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What type of application is a double-rod cylinder best suited for?
a. | work needs to be done on both ends | c. | in higher side load
applications | b. | when the cylinder needs to be more productive | d. | all of the
above |
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6.
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____________ is a large single acting cylinder capable of generating high
forces, generated by the use of a shoulder instead of a piston.
a. | Telescoping Cylinder | c. | Hydraulic Ram | b. | Double-Acting Cylinder | d. | Tandem Cylinder |
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7.
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Which cylinder mouting style allows a cylinder to pivot?
a. | horizontal mount | c. | angle mount | b. | clevis mount | d. | pivot mount |
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8.
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What can occur if a fluid type other than the suggested manufacturing fluid is
used with a hydraulic cylinder?
a. | seal degregation | c. | component failure | b. | excessive leakage | d. | all of the
above |
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Matching
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Match the graphic symbol with the type of cylinder below:
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9.
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Single Acting
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10.
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Single Acting, with spring
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11.
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Double Acting, single rod
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12.
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Double Acting, double rod
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USE A - J BELOW TO ANSWER QUESTIONS 5 - 14
a. | 30,560 kPa, 3032 kPa | f. | 24.76 m/min, 27.85 m/min | b. | 87.40
mm | g. | 25130 lb, 20320
lb | c. | 157.1 kN, 131.9 kN | h. | 3.385 in | d. | 47 gpm | i. | 2122 psi, 134.6 psi | e. | 600.2
in/min | j. | 1307 in/min, 1582
in/min |
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13.
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A cylinder witha a bore diameter of 4 in and a rod diameter of 1.75 in is to be
used in a system with a max pressure of 2000 psi. What are the max extension and retraction
forces?
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14.
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A cylinder witha a bore diameter of 100 mm and a rod diameter of 40 mm is to be
used in a system with a max pressure of 20000 kPa. What are the max extension and retraction
forces?
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15.
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A cylinder with a bore diameter of 3 in and a rod diameter of 1.38 in is
required to extend against a load of 15,000 lbs and to retract against a load of 750 lbs. What
pressure is required for each stroke?
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16.
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A cylinder with a bore diameter of 50 mm and a rod diameter of 20 mm is
required to extend against a load of 60,000 N and to retract against a load of 5000 N. What pressure
is required for each stroke?
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17.
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A cylinder is required to extend against a load of 18,000 lbs with a max
pressure of 2000 psi. What size cylinder is required?
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18.
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A cylinder is required to extend against a load of 150 kN with a max pressure
of 25000 kPa. What size cylinder (in mm) is required?
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19.
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A cylinder with a bore diameter of 3.5 in is to be used in a system with a 25
gpm pump. What is the extension speed?
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20.
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A cylinder with a bore diameter of 1.5 in and a rod diameter of 0.625 in is to
be used in a system with a 10 gpm pump. What are the extension and retraction speed?
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21.
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A cylinder with a bore diameter of 60 mm and a rod diameter of 20 mm is to be
used in a system with a 70 lpm pump. What are the extension and retraction speed?
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22.
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A cylinder with a bore diameter of 4 in is required to extend at a velocity of
1.2 ft/s. What flow rate (in gpm) is required to achieve this speed?
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USE A - J BELOW TO ANSWER QUESTIONS 15 - 22
a. | 63.64 hp | f. | 8.724 gpm, 11.46 gpm | b. | 50.4 lpm, 71.43 lpm | g. | 2 in, 1471 in/min | c. | 6.36
hp | h. | 1932 lb, 517.6
ln | d. | 2.425 in | i. | 37.61 mm | e. | 37.5 kW | j. | 140.3 lpm |
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23.
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A cylinder with a bore diameter of 63 mm is required to extend at a velocity of
0.75 m/s. What flow rate (in lpm) is required to achieve this speed?
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24.
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A cylinder is required to extend at a minimum speed of 1000 in/min in a system
with flow rate of 20 gpm. What size cylinder is required (in)?
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25.
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If cylinders are available in 1/2-in increments, what size cylinder would you
select for the sytem in problem 16 above? What will the extension speed be with this
cylinder?
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26.
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A cylinder is required to extend at a min speed of 1.5 m/s in a system
with a flow rate of 100 lpm. What cylinder size is required?
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27.
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A cylinder is required to move a 20,000 lb load at a velocity of 1.75 ft/s.
What is the output horsepower?
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28.
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A cylinder is required to move a 150 kN load at a velocity of 0.25 m/s. What is
the output power?
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29.
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A cylinder is required to move a 4200 lb load 20 inches in 2 seconds. What is
the output horse power?
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30.
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A cylinder with a bore diameter of 3.5 in and a rod diameter of 1.25 in is to
be used in a system with a 10 gpm pump. What are the return flow rates when the cylidner is extending
and retracting?
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31.
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A cylinder with a bore diameter of 50 mm and a rod diameter of 20 mm is to be
used in a system with a 60 lpm pump. What are the return flow rates when the cylinder is extending
and retracting?
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32.
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They cylinder shown in Figure 4-24 is subjected to a 2000 lb(FLOAD)
load that is at a 15º (a) angle to its axis. What is teh force the cylinder must generate? What
is the side load on the bearings?
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USE A-G BELOW TO ANSWER QUESTIONS 25-31
a. | 15975 N, 5814 N | e. | 2261 psi | b. | 2564 psi | f. | 5849 lb | c. | 75400 N, 33930
N·m | g. | 4081 lb, 8162
ft·lb | d. | 7536 kPa |
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33.
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They cylinder shown in Figure 4-24 of the book is subjected to a 17000 N
(FLOAD) load that is at a 20º (a) angle to its axis. What is the force the cylinder
must generate? What is the side load on the bearings?
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34.
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The cylinder shown in Figure 4-25 of the book has a 1.5 bore and is mounted at
65º (a) to the horizontal, as shown. It is subjected to a 5000 lb (FLOAD) vertical
load. What is the required pressure?
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35.
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The system in the previous problem has a max operating pressure of 3000 psi.
What is the max load this cylinder can lift the current configuration?
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36.
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The cylinder shown in Figure 4-25 of the book has a 63 mm bore and is mounted
at 70º (a) to the horizontal. It is subjected to a 25 kN (FLOAD) vertical load. What
is the required pressure?
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37.
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The cylinder shown in Figure 4-26 has a 2 in bore an rotates a 24 in lever arm
in a system with a max operating pressure of 1500 psi. Determine the max force of the lever in the
position shown. What is the max torque of the lever arm at this instant?
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38.
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A cylinder with a bore of 80 mm rotates a 450 mm lever arm in a system with a
max operating pressure of 30,000 kPa. Determine the max force of the lever when the angle between the
cylinder axis and the perpendicular of the lever arm is 60º. What is the max torque of the lever
arm at this instant?
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39.
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A cylinder with a 3.5 in bore is required to rotate a 36 in lever arm with a
minimum torque of 50,000 ft-lbs. The max angle between the cylinder axis and the perpendicular of the
lever arm is 40º. What is the minimum pressure required?
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