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Machine Design

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

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

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Machine Design
Which of the following has threads at both ends?

Bolt
Tap bolt
None of these
Stud

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + cosφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + sinφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)

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Machine Design
The resistance to fatigue of a material is measured by

Elastic limit
Ultimate tensile strength
Young's modulus
Endurance limit

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

55°
29°
60°
47.5°

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Machine Design
Lewis equation in gears is used to find the

Fatigue stress
Shear stress
Compressive stress in bending
Tensile stress in bending

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