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Machine Design

Machine Design
The shock resistance of steel is increased by adding

Cobalt and molybdenum
Nickel
Chromium
Nickel and chromium

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Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

5 mm
6 mm
7 mm
4 mm

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Machine Design
The piston rod of a steam engine is usually connected to the cross-head by means of

Bolted joint
Cotter joint
Knuckle joint
Universal joint

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Machine Design
Which of the following bearing is preferred for oscillating conditions?

Taper roller bearing
Needle roller bearing
Angular contact single row ball bearing
Double row roller bearing

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

Uniform velocity
Simple harmonic motion
Cycloidal motion
Uniform acceleration and retardation

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Machine Design
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

Elastic strength
None of these
Yield strength
Shear strength

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