Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The three basic components of a chain drive are _____________.
a. | chain, roller, and pin | c. | chain, master link, and roller | b. | chain, driver
sprocket, and driven sprocket | d. | pins, rollers, and bushings |
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2.
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In a chain drive system, the speed and torque of the driven shafter are
determined by the ________________.
a. | relative number of teeth between the driven sprocket and the driver
sprocket | c. | ratio of the chords between the driven sprocket and the driver
sprocket | b. | ratio of the pitch circles between the driven sprocket and the driver
sprocket | d. | ratio of the
diameters between the driven sprocket and the driver sprocket |
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3.
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The sprocket ratio for a chain drive system having a driven sprocket with 54
teeth and a driver sprocket with 18 teeth is __________.
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4.
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In a chain drive system, the speed of the driven shaft will decrease as the
__________ increases.
a. | drive torque | c. | chain pitch | b. | sprocket ration (SR) | d. | driver torque |
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5.
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In a chain drive system, the __________ on the driven shaft will increase as the
sprocket ratio (SR) increases.
a. | torque | c. | chain pitch | b. | speed | d. | chord pitch |
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6.
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A chain drive system has a driver sprocket with 24 teeth and a driven sprocket
with 72 teeth. If the driver shaft speed is 600 RPM, the driven shaft speed will be
______________.
a. | 100 RPM | c. | 1800 RPM | b. | 200 RPM | d. | 2400 RPM |
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7.
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A chain drive system has a driver sprocket with 24 teeth and a driven sprocket
with 72 teeth. If the driver shaft has 633 ft-lbs of torque, the torque on the drven shaft will
be _____________.
a. | 133 ft-lbs | c. | 1899 ft-lbs | b. | 211 ft-lbs | d. | 3165 ft-lbs |
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8.
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The most common type of chain used for mechanical drive is a ___________.
a. | roller chain | c. | silent chain | b. | rollerless chain | d. | leaf chain |
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9.
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A chain should be replaced when its length becomes ___________ longer than the
original length.
a. | 1 inch | c. | 3 % | b. | 3 inches | d. | 10 % |
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10.
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Multiple strand chains are used ______________.
a. | for lower power, intermittent running | c. | for silent
running | b. | to run multiple shafts | d. | to transmit a great deal of power |
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11.
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Compared to a v-belt drive, a chain drive __________________.
a. | requires more tension | c. | is less efficient | b. | is more efficient | d. | needs less
lubrication |
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12.
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Chain sag is measured by rotating the sprockets so there is little or no chain
sag in the ____________ side and measuring the sag in the ___________ side.
a. | motor; sprocket | c. | taut; slack | b. | vertical; horizontal | d. | driver sprocket; driven
sprocket |
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13.
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Chain sag is measured _______________.
a. | at the driven sprocket | c. | at the driver sprocket | b. | midway between the
sprockets | d. | does not have a
measurement |
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14.
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To install a chain, in some applications ____________.
a. | the driver shaft is moved | c. | a master link is
used | b. | the driven shaft is moved | d. | all of these |
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15.
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A chain puller tool is a tool used to hold two ends of a chain together while
the ____________.
a. | driver sprocket is installed | c. | sag of the chain is
decreased | b. | chain is pulled through the sprockets | d. | master link is
installed |
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16.
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When using a chain puller, the jaws are opened and closed by
______________.
a. | A dial on top of the tool | c. | a jaw inserted into the chain
| b. | by hand | d. | using a torque wrench |
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Matching
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SEGMENT 1
a. | chordal | d. | torque, sprocket | b. | sprockets, chain | e. | sprocket, driven, driver | c. | sprocket |
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17.
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Two ______ and a(n) ________ are the three basic components of a chain drive
system.
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18.
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___________ action is caused by straight chain links moving about a circular
sprocket.
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19.
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In a chain drive _________ ratio cannot be determined by the pitch diameters of
the sprockets.
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20.
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________ ratio is the ratio of the number of teeth of the ______ sprocket
divided by that of the _______ sprocket.
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21.
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The speed and __________ of a driven sprocket can be determined from those same
values of the driver sprocket and the ___________ ratio.
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SEGMENT 2
a. | rollerless, rollers | d. | transferred, mechanical drive | b. | multiple | e. | silent | c. | flying off the sprocket | f. | leaf |
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22.
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_________ chains are similar in construction to a roller chain except they have
no _________.
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23.
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________ chains create less noise than standard chains because of their
tooth-shaped design.
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24.
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Chains that are made up of a series of plates held together by pins are called
________ chains.
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25.
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_________ strand chains are similar to standard chains, but they ahve two or
more widths.
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26.
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The interlocking between chain and sprocket prevent the chain from ______ when
a load is applied to the sprocket.
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27.
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Power is __________ from one shaft to another via a __________.
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SEGMENT 3
a. | 4,6 | d. | loose | b. | 2, sag | e. | 2,3 | c. | adjustable centers,
idler |
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28.
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The two methods commonly used to adjust chain centers are ___________ centers
and by using a(n) _________.
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29.
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The allowable mid-span movement of a horizontally oriented chain drive is ____
to ______ percent.
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30.
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The allowable mid-span movement of a vertically oriented chain drive is _____
to _____ percent.
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31.
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Dividing the mid-span movement by _______ will give you the chain _____.
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32.
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If chain tension is too _______ the chain drive will wobble off of the
sprockets during operation.
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SEGMENT 4
a. | reduce, wear | d. | upper | b. | tachometer | e. | straight, rule | c. | prony,
scale |
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33.
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Chain sag can be measured using a _____ edge and a _______.
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34.
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On a horizontally oriented drive, it is very important for the sag to be on the
________ strand.
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35.
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Shaft speed is measured using a ___________.
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36.
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Shaft torque can be determined by using a _________ brake and a(n) __________.
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37.
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A chain that has too little sag can __________ the efficiency of the drive
system and can cause excess __________.
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SEGMENT 5
a. | sprocket | c. | master link | b. | chain puller | d. | adjustable |
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38.
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The easiest drive system to install a chain on is one with _______ centers.
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39.
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A chain can be disconnected and reconnected at one poi nt through the use of a
_____________.
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40.
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A ___________ is used to pull the loose ends of a chain together.
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41.
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The ____________ alignment can be checked with a straight edge.
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