Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The rod side area that produces the pull force on a double-acting cylinder is
called the ______________ area.
a. | blind | c. | annular | b. | cap | d. | rod |
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2.
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Pascal’s Law states that pressure in a confined fluid is equal and acts
______________.
a. | on each flat surface | c. | only at the bottom of the vessel | b. | perpendicular to all
surfaces | d. | only against the
external load |
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3.
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The hydraulic lever provides __________________.
a. | flow manipulation | c. | power multiplication | b. | a pressure drop | d. | force
multiplication |
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4.
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Pressure is created by the ______________.
a. | pump | c. | resistance to flow | b. | reservoir | d. | flow meter |
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5.
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Delta P is another name for _______________.
a. | flow rate | c. | pressure differential | b. | the flow direction
arrow on a valve sysmbol | d. | valve |
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6.
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As oil is pumped through a hydraulic system, it progressively
______________.
a. | drops in flow rate | c. | increases in flow rate | b. | drops in
pressure | d. | increases in
pressure |
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7.
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Pressures are stated as ____________________.
a. | PSI | c. | PSIG | b. | PSIA | d. | All of the
above |
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8.
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Flow occures between two connected points in a hydraulic system when
______________.
a. | there is a vacuum | c. | there is a high pressure | b. | a pressure
differential exists | d. | pressure is the same at both points |
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9.
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The area of a circle can be calculated by ______________.
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Matching
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Segment 1
a. | 6283 | e. | greater
retraction | b. | 4712 | f. | greater | c. | friction | g. | actual | d. | rod |
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10.
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For a double-acting cylinder operating at one pressure, the force of extension
will be ____________ than the force of retraction.
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11.
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The annular area of a cylinder is less than the cap (piston) area because of
the ____________.
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12.
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To move a cylinder rod, you must overdome the load, back pressure, and
___________.
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13.
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Using a load spring to measure forces provides __________ force values.
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14.
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A 4-inch diameter cylinder with a 2-inch diameter rod eill provide a
theoretical push force of __________ lbs at 500 psi.
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15.
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The theoretical pull (retraction) force that the cylinder in question 5 would
provide is __________ lbs.
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16.
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A smaller cylinder rod in the example of question 5 would provide a(n)
_____________ force.
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Segment 2
a. | 5000 | d. | area | b. | confined | e. | force | c. | distance |
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17.
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Pascal’s Law states that pressure on a(n) _________ fluid is transmitted
undiminished to every portion of a container.
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18.
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When using hydraulic leverage, _________ is multiplied.
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19.
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To increase the force out of an actuator, increase the pressure over the
_________.
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20.
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When using hydraulic leverage, _________ is lost.
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21.
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1000 psi acting across an area of five square inches produces _________ lbs of
force.
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Segment 3
a. | Pascal’s Law | d. | Reduces | b. | Add | e. | Frictional | c. | Pressure |
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22.
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___________ is caused by the resistance to flow.
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23.
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Fluid blocked in a circuit will exert pressure in accordance with
__________.
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24.
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___________ resistance to fluid flow can never be completely
eliminated.
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25.
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Fluid resistances in series create pressure drops which _________
together.
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26.
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Decreasing the upstream pressure of a needle valve, _________ flow rate through
it.
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Segment 4
a. | pressure | d. | vented
reservoir | b. | psig | e. | atmospheric | c. | pressure
difference |
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27.
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Oil is forced into a hydraulic pump by atmospheric pressure when a(n) _________
is used.
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28.
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The absolute ________ at sea level is 14.7 psi / 101 kPa.
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29.
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To convert guage pressures to absolute, add _________ pressure to the guage
pressure.
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30.
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Guage pressures can be stated as psi or ____.
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31.
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To have flow between two points, a(n) __________ must exist.
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