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Machine Design

Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

Twice
Half
Thrice
None of these

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Machine Design
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

(π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
3 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n

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Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

120°
180°
360°
270°

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Machine Design
The included angle for the British standard whitworth thread is

47.5°
55°
60°
29°

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Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/3
d/2
d/4
3d/4

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Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Acme
Square
Metric
Buttress

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