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Machine Design

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

4
2
6
8

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Machine Design
A bolt is designed on the basis of __________ with a large factor of safety.

Direct bending stress
Direct shear stress
Direct compressive stress
Direct tensile stress

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Machine Design
Gears are casted by

Sand mould casting
Centrifugal casting
Permanent mould casting
Slush casting

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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)

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

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Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Backlash
Face width
Working depth
Clearance

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Machine Design
The included angle in unified of American National threads is

47°
60°
29°
55°

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