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Machine Design

Machine Design
In standard taper roller bearings, the angle of taper of outer raceway is

8°
5°
25°
15°

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Machine Design
The longitudinal stress is __________ of the circumferential stress.

One-half
Double
Three-fourth
Two-third

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Machine Design
Lewis form factor for 14½° composite and full depth involute system is (where T = Number of teeth)

None of these
0.154 - (0.912/T)
0.175 - (0.841/T)
0.124 - (0.684/T)

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Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Pressure angle
None of these
Pitch lead angle
Helix angle

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Remain unaffected with cross-section area
Decreasing the cross-section area of bar
Would depend upon other factors
Increasing the cross-section area of bar

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Machine Design
For circumferential joint in boilers, the type of joint used is

Butt joint with double cover plate
Lap joint with one ring overlapping the other
Butt joint with single cover plate
Any one of the above

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