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Machine Design

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

122°
40°
136°
152°

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Machine Design
The shear plane in case of bolts should

Be parallel to axis of bolt
Be across threaded portion of shank
Be normal to threaded portion of shank
Never be across the threaded portion

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

55°
60°
47.5°
29°

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Machine Design
The lead angle of a worm is 22.5°. Its helix angle will be

90°
45°
67.5°
22.5°

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Machine Design
The application of third type levers is found in

Hand wheel of a punching press
Lever of a loaded safety valve
Handle of a hand pump
A pair of tongs

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Machine Design
In skew bevel gearing, the axes of shafts are

Intersecting and the teeth are curved
Non-intersecting and nonparallel and the teeth are curved
Non-intersecting and non-parallel and the teeth are straight
None of these

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