Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The groove in a shaft for a key is called a _______________.
a. | keygroove | c. | keyway | b. | keyseat | d. | keyhole |
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2.
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A woodruff key has a ____________ shape.
a. | half-moon | c. | square | b. | rectangular | d. | tapered |
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3.
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The nominal height of a key is the height of the keystock without accounting for
_________.
a. | taper | c. | temperature | b. | wear | d. | tolerance |
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4.
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The best instrument to use when measuring the inside width of a keyseat or the
depth of the keyseat is a ______________.
a. | micrometer | c. | rule | b. | dial caliper | d. | feeler gauge |
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5.
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_____________ set scres are used for permanent mounting of components on
shafts. The point bites into the shaft to create a high axial and torsional locking
strength.
a. | Oval point | c. | Cone point | b. | Dog point | d. | Cup point |
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6.
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When assembling a key in a shaft keyseat, the key _______________.
a. | should fit into the keyseat without forcing it | c. | should be pressed into place using
a vise | b. | should be tapped into place with a hammer | d. | should be cooled and the shaft
heated |
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7.
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The best way to remove a hub from a shaft is to ______________.
a. | tap the hub with a hammer | c. | heat the hub | b. | use a bearing
puller | d. | apply a pry bar to
the edge of the hub |
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8.
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Two common methods used to load a mechanical drive system are suing dynamometer,
or a ______________.
a. | torque converter | c. | shaft speed indicator | b. | load
calculator | d. | prony
break |
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9.
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The power output at a motor’s shaft is found by __________________.
a. | multiplying the torque times the load | c. | dividing the torque by the
load | b. | multiplying the torque times the shaft speed | d. | dividing the torque by the shaft
speed |
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10.
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A motor shaft producing 4 ft-lb torque at 1313 RPM has _____________ Hp. Use
the formula 
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11.
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A ______________ ammeter is opened and placed around the wire to measure the
current, which is convenient because the user does not have to disconnect the circuit.
a. | handheld | c. | clamp-on | b. | built-in | d. | wrap-around |
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12.
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Mechanical Power Efficiency is defined as __________________.
a. | the ratio of the Power out to the Power in | c. | output torque divided by
load | b. | torque time RPM | d. | load time radius arm |
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13.
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As torque on an electric motor increase, ______________.
a. | current (amps) remains constant | c. | current
decreases | b. | current increases | d. | RPM increases |
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Matching
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SEGMENT 1
a. | gib head | d. | grooves | b. | woodruff | e. | keyseat-hub | c. | key
stock |
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14.
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A key shaft consists of up to three parts which are the key, keyseat-shaft, and
________.
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15.
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A key is a piece of metal that fits snugly between two _________.
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16.
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A(n) __________ key is tapered square key with a head on it.
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17.
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A(n) __________ key is shaped like a half moon.
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18.
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A key is made from _________ which is cut to the length needed and the burs
filed off.
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SEGMENT 2
a. | specific tolerance | d. | rule | b. | first | e. | second | c. | dial
caliper |
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19.
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Checking to see if the hub has a set screw hole drilled in its side is the
__________ step to assemblying a shaft and a hub using a key fastner.
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20.
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Cleaning the shaft keyseat and the hub keyseat with a wire brush is the
__________ step to assembling a shaft and a hub using a key fastner.
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21.
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The length of a keyseat can be measured using a(n) _________.
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22.
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A key stock which is purchased from a supplier has a(n) _________.
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23.
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The depth of the keyseat on the shaft can be measured using a(n) _________.
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SEGMENT 3
Note: some
answer may apply to multiple questions.
a. | load | c. | distance | b. | rotary | d. | radius distance |
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24.
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On a prony brake, torque is computed by multiplying the load times _____.
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25.
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A prony brake is a device used to apply a _____ to a motor.
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26.
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Work is defined as force times ______.
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27.
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A dynamometer is used to _________ a mechanical drive system.
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28.
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_________ mechanical power is the rate or speed at which the rotating power
transmission system turns a load.
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SEGMENT 4
a. | speed; torque | d. | graph | b. |  | e. | electric power | c. | less | f. | prony
brake |
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29.
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The output of power transmission equipment is alwasy ______ than the power
input.
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30.
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The formula for mechanical power efficiency is ________.
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31.
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The mechanical efficiency of a power transmission can be determined by
measuring the shaft ______ and ______ at the input and output.
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32.
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In most cases you can more easily monitor the efficiency of a power
transmission by measuring the ________drawn by the motor.
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33.
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Current measurements are compared to a(n) ________ supplied by the motor
manufacturer to determine the torque of a motor.
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34.
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The torque delivered by a motor can be measured by using a(n) __________ or a
dynamometer.
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