Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The function of a machine shaft is to ________________.
a. | act as a spacer between a motor and a driven shaft | c. | transmit mechanical power from one
location to another | b. | support the weight of a
motor | d. | act as a heat sink to
counteract motor overheating. |
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2.
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A common material used in machine shafts is __________________.
a. | cold rolled steel | c. | pewter | b. | copper | d. | iron |
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3.
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Chrome-plated steel shafts should be used __________________.
a. | to improve the beauty of the machine | c. | on shafts exceeding 6 inches in
diameter | b. | to resist rusting or corrosion | d. | for flexibility |
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4.
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The accuracy stock diameter of a shaft is _____________ the nominal
diameter.
a. | always greater than | c. | always equal to | b. | usually greater than | d. | always less
than |
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5.
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The three types of loads placed of bearings are
___________________________.
a. | radial, coaxial, and transaxial | c. | radial, helical, and
transverse | b. | radial, thrust, and combination | d. | radial, reverse, and
axial |
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6.
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Without bearings to hold a shaft in place, loads would cause
_____________.
a. | excessive wear | c. | the machine to fail | b. | the shaft to move out of
place | d. | all of
these |
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7.
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All electric motors require ____________ bearings mounted _________ to the
motor.
a. | two; internally | c. | two; externally | b. | one; internally | d. | one; externally |
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8.
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The two major categories of bearings used in industry are
__________________.
a. | ball and roller | c. | plain and anti-friction | b. | ball and
journal | d. | friction and
anti-friction |
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9.
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Both major categories of shaft bearings can be mounted in one of which two
ways?
a. | Four bolt and two bolt. | c. | Single assembly and split
assembly. | b. | Pillow block and flange. | d. | None of these |
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10.
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The coupling provides a secure method of transmitting __________ from one shaft
to another.
a. | torque and thrust | c. | torque and speed | b. | heat | d. | distance |
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11.
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The flange coupling is classified as which type of mechanical coupling?
a. | Rigid | c. | Universal | b. | Flexible | d. | Clutch |
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12.
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The advantage of the flexible jaw coupling is _________________.
a. | less expensive | c. | dissipates heat better | b. | allows more
misalignment | d. | holds shaft
together better |
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13.
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The two major types of misalignment corrected by shaft alignment are
______________.
a. | line of sight and vibration | c. | angular and
vibration | b. | angular and parallel | d. | parallel and line of sight |
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14.
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The procedure for aligning two shafts is to check and correct _______ and
________ misalignment in two planes: vertical and horizontal.
a. | side view; top view | c. | angular; parallel | b. | coupling gap; space | d. | top; bottom |
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15.
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When aligning two shafts, the reason to rotate the coupling hubs before making
each measurement is so that a measurement is _______________.
a. | taken from a different place each time | c. | taken at 45 degree increments
around the entire hub | b. | take from the same place on the hub each
time | d. | none of
these |
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