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Machine Design

Machine Design
The number of slots in a 25 mm castle nut is

8
2
4
6

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Machine Design
Three different weights fall from a certain height under vacuum. They will take

None of these
Same time to reach earth
Times proportional to weight to reach earth
Times inversely proportional to weight to reach earth

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Machine Design
Lewis equation in gears is used to find the

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

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Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

Half
Thrice
None of these
Twice

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Machine Design
A cotter joint is used to connect two __________ rods.

Perpendicular
Co-axial
Parallel
None of these

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

40°
122°
152°
136°

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