Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Pulley ratio is defined as the ratio of _________________________.
a. | outside diameter of the driven pulley to the outside diameter of the driver
pulley | c. | pitch diameter of the driver pulley to the pitch diameter of the driven
pulley | b. | pitch diameter of the driven pulley to the pitch diameter of the driver
pulley | d. | shaft diameter of
the driver pulley to the shaft diameter of the driven pulley |
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2.
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The pitch circle of a belt drive is ______________________.
a. | the outter edge of the hub | c. | the place in the belt which
represents the center of the force that is being transmitted by the belt | b. | the bottom of the
sheave groove | d. | located
somewhere outside the outer diameter of the sheave |
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3.
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The three basic components for a belt drive system are _______________.
a. | motor, pump, and V-belt | c. | V-belt, driver sheave, and driven
sheave | b. | motor, pulley, and drive sheave | d. | V-belt, shaft, and
pulley |
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4.
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In a belt drive system, as the pulley ratio increases, shaft speed on the driven
pulley will ___________________ and shaft torque will ______________.
a. | increase; increase | c. | increase; decrease | b. | decrease; remain the same | d. | decrease;
increase |
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5.
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One important characteristic of a timing belt is that it
________________.
a. | requires more tension that a v-belt | c. | makes more noise than a flat
belt | b. | will not slip during operation | d. | is easier to replace than a
v-belt |
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6.
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A Fractional Horsepower (FHP) V-Belt is used for
____________________________.
a. | low power, intermittent operation | c. | conveyors | b. | constant running
installations | d. | applications
exceeding 100 Hp |
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7.
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In the process of installing a chain drive system, the motor and driven
component should be checked for a soft foot condition and excessive run-out. The saft run-out
should be no more than ______________.
a. | 0.07 inch | c. | 0.002 inch | b. | 0.007 inch | d. | 0.02 inch |
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8.
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A used belt requires __________ belt deflection force than a new belt.
a. | slightly more | c. | 50% more | b. | less | d. | the same |
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9.
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Pitch is defined as the distance between a point and a similar corresponding
point. Examples of pitch are __________.
a. | chains | c. | gears | b. | threads | d. | all of these |
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10.
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The maximum allowable deflection force on a belt is __________ than the minimum
defelection force.
a. | 5% greater | c. | 50% greater | b. | 50% less | d. | 100% greater |
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11.
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Belt span is defined as the ______________.
a. | sum of the pitch diameters of the driven sheave and the driver sheave | c. | width of the
belt | b. | distance between the centers of the driven sheave and the driver
sheave | d. | distance between the
points on the sheaves where the belt touches each sheave |
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12.
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A V-belt should ride __________ in the groove with its top near the top of the
sheave, and does not touch the __________ of the sheave.
a. | high; bottom | c. | high; bottom | b. | low; bottom | d. | low; sides |
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13.
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The most basic way to test the tension of a belt is to use ____________.
a. | a tension tester | c. | your sense of touch | b. | a spring scale and straight
edge | d. | increase belt
span |
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Matching
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SEGMENT 1
a. | pulley ratio | d. | pulley | b. | relative diameter | e. | length | c. | driver pulley,
driven pulley |
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14.
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Another name for a sheave is a(n) __________.
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15.
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The __________ of the driven sheave and the driver sheave determine the speed
and torque transmitted to the driven shaft.
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16.
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A belt drive has three functions derived from the concept of pitch: pitch,
diameter, pitch circle, and pitch ________.
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17.
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The _______ is determined by dividing the pitch diameter of the driven pully by
the pitch diameter of the driver pully.
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18.
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The pulley ratio is determined by dividing the __________ rotational speed by
the __________ rotational speed.
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SEGMENT 2
a. | timing | e. | V | b. | sheave guage | f. | fractional horsepower (FHP) | c. | should
not | g. | should | d. | flat |
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19.
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A common belt used for conveyors is the _______ belt.
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20.
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The ________ belt is designed to grip the walls of a grooved pulley.
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21.
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______ belts have notches that engage notches in teh pulleys to prevent
slipping.
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22.
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A(n) ________ v-belt is a light dry belt designed fro low power applications
and intermittent running.
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23.
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A v-belt _________ (should/should not) touch the bottome of the sheave.
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24.
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A(n) _______ is used to check a sheave for wear.
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SEGMENT 3
a. | adjustable | c. | operating speed | b. | belt deflection method | d. | motor, driven
shaft |
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25.
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The method used to measure belt tension is called __________.
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26.
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The specific force for a belt is determined using the belt size, sheave size,
___________, and whether or not it is new or old.
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27.
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Tension is applied to a belt by moving the ________ away from the _______.
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28.
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One method of adjusting belt tension is using a(n) __________ motor
base.
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SEGMENT 4
a. | conventional | d. | your hand | b. | deflection | e. | straigh edge | c. | belt
span |
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29.
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The hand pressure method of belt tensioning requires you to strike the belt
with ____________.
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30.
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The hand pressure method can be used with both frictional and _______ belts.
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31.
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The force _______ method uses a tension tester to measure belt tension.
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32.
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A spring scale can be used with a(n) __________ to measure belt tension.
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33.
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The ________ is the distance between the points on the sheaves where the belt
touches each sheave.
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