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Machine Design

Machine Design
The included angle for the British Association thread is

55°
47.3°
29°
60°

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Machine Design
For hardening alloy steels and high speed steels, they are heated to

1300 to 1500°C
1100 to 1300°C
700 to 900°C
500 to 600°C

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Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

None of these
Right hand
Left hand
Both A and B

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Machine Design
Auto frettage is the method of

Joining thick cylinders
Pre-stressing thick cylinders
Calculating stresses in thick cylinders
Increasing the life of thick cylinders

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Machine Design
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

Maximum shear stress theory
Maximum distortion energy theory
Maximum principal stress theory
Maximum strain energy theory

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Machine Design
For low and moderate speed engines, the cam follower should move with

Uniform acceleration and retardation
Simple harmonic motion
Uniform velocity
Cycloidal motion

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