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Machine Design

Machine Design
A bench vice has following type of threads

Square
Metric
Acme
Buttress

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Machine Design
Which of the following is an anti-friction bearing?

Pedestal bearing
Journal bearing
Collar bearing
Needle bearing

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Machine Design
The strength of the unriveted plate (P) per pitch length is equal to

(p - d) t.σt
p.t.σt
(p - d) σt
p.d.σt

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Machine Design
Surface endurance limit of gear material is dependent upon its

Toughness
Yield strength
Brinell hardness number
Elastic strength

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Machine Design
A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is

7 N-m
5 N-m
10 N-m
15 N-m

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Machine Design
Factor of safety for fatigue loading is the ratio of

Young's modulus to the ultimate tensile strength
Elastic limit to the working stress
Endurance limit to the working stress
Elastic limit to the yield point

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