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Machine Design

Machine Design
The contact ratio for gears is

Zero
None of these
Less than one
Greater than one

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Machine Design
A cotter joint is used to connect two __________ rods.

Perpendicular
Co-axial
Parallel
None of these

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Machine Design
The taper on cotter varies from

1 in 32 to 1 in 24
1 in 24 to 1 in 20
1 in 48 to 1 in 24
1 in 15 to 1 in 10

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Machine Design
The helix angle for single helical gears ranges from

10° to 15°
35° to 50°
15° to 20°
20° to 35°

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Machine Design
The number of slots in a 25 mm castle nut is

4
8
6
2

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Machine Design
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

Decreasing the modulus of elasticity of the bar
All of these
Decreasing the cross-sectional area of the bar
Increasing the length of bar

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