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Machine Design

Machine Design
Fibrous fracture occurs in

Elastic material
Ductile material
Hard material
Brittle material

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Machine Design
The notch angle of the Izod impact test specimen is

45°
20°
30°
10°

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Machine Design
The shear plane in case of bolts should

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

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Machine Design
Oil in journal bearing should be applied at the point where load is

Average
Maximum
Any one of the above
Nil or lightest

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Machine Design
In nitrated parts, the origins of the fatigue cracks will occur at

None of these
Just below the surface
Surface
Within the core

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to(Where, Pc = tension in belt due to centrifugal force)

2 Pc
3 Pc
Pc/3
1 Pc

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