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Machine Design

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

136°
122°
40°
152°

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Machine Design
The shock absorbing capacity of a bolt may be increased by

Increasing its shank diameter
Making the shank diameter equal to core diameter of thread
Decreasing its shank diameter
Tightening the bolt properly

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Machine Design
The process which improves the machinability of steels, but lowers the hardness and tensile strength is

Normalising
Process annealing
Full annealing
Spheroidising

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Machine Design
The function of cutting oil when threading a pipe is to

Help removes chips
Provide cooling action
All of these
Lubricate the dies

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Machine Design
Belt slip may occur due to

All of these
Loose belt
Driving pulley too small
Heavy load

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kf + 1)/ (Kt + 1)
(Kf - 1)/ (Kt - 1)
(Kt + 1)/ (Kf + 1)
(Kt - 1)/ (Kf - 1)

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