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Machine Design

Machine Design
The material generally used for aircraft components is

Mild steel
Aluminium
Stainless steel
High speed steel

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Machine Design
The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to

2 T
1 T
T/2
4 T

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Machine Design
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

εc² + εl
εc + εl²
εc + 2εl
2εc + εl

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Machine Design
The ratio of pitch circle diameter in millimeters to the number of teeth, is called

Circular pitch
Diametral pitch
None of these
Module

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Machine Design
The period during which the cam follower remains at rest, when cam moves, is known as

Fixed period
Constant period
Dwell period
Idle period

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Machine Design
The stress in the threaded part of the bolt will be __________ as compared to the shank.

None of these
Same
Higher
Lower

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