Machine Design Questions and Answers – Gears

This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Gears Introduction”

1. The common normal to the curves of the two teeth must not pass through the pitch point.
a) True
b) It must pass
c) It may or may not pass
d) None of the listed
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2. Which of the following can be used for power transmission in intersecting shafts.
a) Spur Gear
b) Helical Gear
c) Bevel Gear
d) None of the listed
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3. Is it possible to transmit power between shafts lying in different planes using gears?
a) Yes
b) No
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4. The two gears are said to have conjugate motion if
a) They have constant angular velocity ratio
b) Variable angular velocity ratio
c) Infinitely small angular velocity ratio
d) None of the mentioned
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5. Which of the following is not true about gears?
a) Positive drive
b) Constant velocity ratio
c) Transmit large power
d) Bulky construction
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6. Gear drive don’t require precise alignment of shafts.
a) True
b) False
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7. Spur gears can be used only when the two shafts are parallel.
a) True
b) False
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8. The teeth of the helical gears are cut parallel to the shaft axis.
a) True
b) False
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9. Herringbone gear can be used in
a) Intersecting shafts only
b) Parallel shafts only
c) Both intersection and parallel shafts
d) None of the mentioned
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10. Bevel gears impose ____ loads on the shafts.
a) Radial and thrust
b) Radial
c) Thrust
d) Neither radial nor thrust
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11. Which of the following are true for worm gears?
a) Worm is in the shape of threaded screw
b) Threads on the worm have small lead
c) Worm imposes high thrust loads
d) Characterised by low speed reduction ratio
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12. Greater the velocity ratio, smaller the gearbox.
a) True
b) Greater the gearbox
c) Size of gearbox remains unaffected
d) None of the listed
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13. Required velocity ratio is 60:1, which of the following are recommended?
a) Worm
b) Spur
c) Bevel
d) None of the mentioned
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14. For a constant velocity ratio, the common normal to the tooth profile at point of contact must pass through a continuously variable point.
a) True
b) It pass through a fixed point
c) Constant velocity ratio isn’t required, hence variable point is preferred
d) None of the listed
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Sanfoundry Global Education & Learning Series – Machine Design.
To practice all areas of Machine Design, here is complete set of 1000+ Multiple Choice Questions and Answers.

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