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Machine Design

Machine Design
In Vickers hardness testing, the pyramid indentor apex is

136°
122°
152°
40°

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Machine Design
The anti-friction bearings

Have low starting and low running friction at moderate speeds
Can carry both radial and thrust loads
All of these
Have high initial cost

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Machine Design
The width of the pulley should be __________ width of the belt.

None of these
Equal to
Less than
Greater than

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Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (90°/T)
p = D sin (120°/T)
p = D sin (360°/T)
p = D sin (180°/T)

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

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Machine Design
Aircraft body is usually fabricated by

Pre-casting
Casting
Riveting
Welding

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