Machine Design Questions and Answers – Terminology of Spur Gears

This set of Advanced Machine Design Questions & Answers focuses on “Terminology of Spur Gears”.

1. In cycloidal gears contact area is
a) Comparatively smaller
b) Comparatively larger
c) Can’t be determined
d) None of the listed
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2. Involute gears have greater contact area as compared to cycloidal gears.
a) True
b) False
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3. Cycloidal teeth consist of
a) Hypocycloid curve
b) Epicycloid gear
c) Both hypocycloid curve and epicycloid curve
d) None of the mentioned
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4. Pressure angle remains constant in case of involute profile.
a) True
b) False
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5. Pressure angle is _____ in case of cycloidal teeth.
a) Constant
b) Variable
c) zero
d) None of the listed
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6. Velocity ratio is the ratio angular velocity of driving gear to that of driven gear.
a) True
b) False
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7. Velocity ratio and transmission ratio are the same thing.
a) True
b) False
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8. Contact ratio is always
a) =1
b) >1
c) <1
d) Can’t be determined
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9. Product of diametric pitch and circular pitch is?
a) π
b) 1/π
c) None of the listed
d) 2
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10. Diameteral pitch is 5, then calculate module of the gear.
a) 0.2
b) 0.4
c) 5
d) 10
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