Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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In ____ systems, air, liquid, or a combination of both is used to transfer
power.
A. | fluid power | B. | hydraulic | C. | pneumatic | D. | All of the
above. |
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2.
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Force is normally expressed in units of ____.
A. | pressure | B. | weight | C. | power | D. | inertia |
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3.
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In fluid power systems, friction is called ____.
A. | resistance | B. | heat exchange | C. | force | D. | inertia |
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4.
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A ____ is a component of a hydraulic system that provides the initial power for
movement in the system.
A. | prime mover | B. | desiccant | C. | regulator
valve | D. | flow control device |
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5.
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A ____ valve is a control device in a hydraulic system that protects against
stress and damage caused by overpressure.
A. | strainer | B. | power | C. | pressure
relief | D. | flow control |
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6.
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In a fluid power system, the ____ device is the component that is ultimately
controlled.
A. | pump | B. | load | C. | fluid
motor | D. | force |
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7.
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Fluid pressure in a hydraulic system is monitored by ____.
A. | pressure indicators | B. | metering | C. | pressure regulator
valves | D. | the load device |
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8.
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In a pneumatic system, the ____ holds pressurized air and serves as the
reservoir for the system.
A. | FRL unit | B. | transmission line | C. | reciprocating
pump | D. | storage tank |
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9.
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The process of removing contaminants from pressurized air is called ____.
A. | filtering | B. | conditioning | C. | metering | D. | pressurizing |
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10.
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The ____ valve in a pneumatic system allows air pressure to be adjusted to a
specific level.
A. | pressure indicator | B. | pressure relief | C. | pressure
regulator | D. | flow indicator |
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11.
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Abrupt changes in the direction of fluid flow create ____.
A. | inertia | B. | pressure | C. | weight | D. | turbulence |
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12.
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____ is considered virtually incompressible.
A. | Air | B. | Hydraulic fluid | C. | The combination of
air and liquid | D. | All of the above. |
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13.
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The amount of force applied to a specific area is ____.
A. | turbulence | B. | flow | C. | pressure | D. | resistance |
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14.
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The ____ is the heart of a fluid system.
A. | pump | B. | fluid | C. | regulator | D. | pressure
indicator |
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15.
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Fluid pumps convert the force of moving fluid into rotary motion using
____.
A. | vanes | B. | gears | C. | pistons | D. | All of the
above. |
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16.
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A ____ is an in-line fluid conditioning device that captures large particles of
foreign matter.
A. | filter | B. | strainer | C. | desiccant | D. | rotary vane |
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17.
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Which of the following is not an example of a heat exchanger
device?
A. | Force-air fan unit | B. | Water-jacket cooler | C. | Gaseous cooling
unit | D. | FRL unit |
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18.
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In-line and T filers contain a desiccant, which removes ____ from fluid in
pneumatic systems.
A. | large particles | B. | small debris | C. | moisture | D. | heat |
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19.
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A ____ adds a small amount of oil to the air after it leaves the regulator in a
pneumatic system.
A. | desiccant | B. | strainer | C. | filter | D. | lubricator |
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20.
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Using ____ control devices, fluid flow can be started, stopped, or reversed
without causing a significant change in pressure or flow rate.
A. | pressure | B. | direction | C. | flow | D. | temperature |
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21.
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Controlling the rate of fluid flow is known as ____.
A. | metering | B. | conditioning | C. | filtering | D. | pressurizing |
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22.
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A(n) ____ system produces mechanical energy by combining fluid power and
electrical power systems.
A. | hybrid | B. | pneumatic | C. | hydraulic | D. | efficient |
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True/False
Indicate whether the
statement is true or false.
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23.
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Direction control devices alter the volume or flow rate of the fluid.
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24.
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Resistance in a fluid power system causes reduced pressure in the system.
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25.
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Return air in a pneumatic system is exhausted into the atmosphere.
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26.
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When air is compressed, both its pressure and volume are increased.
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27.
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Pascal’s law states that pressure applied to a confined fluid is
transmitted, undiminished, throughout the fluid.
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28.
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Force is any factor that produces or modifies the motion of an object.
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29.
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A non-positive displacement pump moves a definite amount of fluid with each
revolution.
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30.
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A check valve permits fluid flow in only one direction.
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31.
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The transmission path of a hydraulic system is often electrical lines and
circuitry.
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32.
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Fluid energy is lost in a fluid power system because it is changed into heat due
to friction and resistance.
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33.
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As temperature increases, the volume of the air in a pneumatic system also
increases.
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34.
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Pressure is the gravitational force exerted on a body by the earth.
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35.
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In an internal-gear rotary pump, the idler gear has fewer teeth than the
rotor.
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36.
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The micron rating of a filter refers to how much power it requires to
operate.
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37.
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Four-way valves are used to start, stop, or reverse the direction of fluid
flow.
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38.
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Single-acting cylinders have only one input port.
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39.
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Multiplication of force allows a force as small as a few ounces to control an
object of several tons.
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Completion
Complete each
statement.
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40.
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All fluid power systems consist of an energy source, transmission path, load,
controls, and ______________________________.
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41.
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In a hydraulic system, a(n) ______________________________ changes rotary energy
into fluid energy.
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42.
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In a typical pneumatic system, the energy source powers a(n)
______________________________, which forces air into a pressurized storage tank.
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43.
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The ______________________________ in a pneumatic system changes the mechanical
energy of air into linear or rotary motion.
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44.
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The fluid moving along the walls of a fluid power system encounters surface
friction called ______________________________.
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45.
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As pressure is applied to air, its volume ______________________________.
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46.
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______________________________ is any factor that tends to produce or modify the
motion of an object.
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47.
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A measure of what a system actually accomplishes is called
______________________________.
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48.
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A(n) ______________________________ pump is a positive displacement pump that
uses a series of sliding vanes to move fluids.
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49.
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A volute pump is a(n) ______________________________ pump with a spiral-shaped
housing.
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50.
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______________________________ is a very dry substance that removes moisture in
a pneumatic system.
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51.
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With a ______________________________ displacement pump, the amount of fluid
that passes through the pump with each rotation varies.
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52.
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Fluid power systems use ______________________________ devices to alter the
direction, pressure, and volume of fluid flow.
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Matching
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Match each term with its function or description. A. | Resistance | B. | Direction control | C. | Force | D. | Inertia | E. | Metering | F. | Pressure | G. | Centrifugal
pump | H. | Non-positive displacement pump | I. | Positive displacement pump | J. | Reciprocating
pump | K. | Transmission lines |
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53.
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A non-positive displacement pump that moves a varying amount of fluid with each
rotation using an impeller blade.
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54.
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An object’s resistance to change.
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55.
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Regulate the rate of fluid flow.
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56.
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Device that starts, stops, or reverses fluid flow.
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57.
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For each revolution of the motor shaft, the piston completes both an intake and
a discharge stroke.
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58.
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Friction in a fluid system.
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59.
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Rigid metal piping, flexible metal tubing, or flexible hose.
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60.
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A definite amount of fluid passes through the pump during each
revolution.
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61.
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Produces or modifies the motion of an object.
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62.
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The amount of force applied to a specific area.
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