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Machine Design

Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

1.25 d
0.5 d
0.75 d
d

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Machine Design
The strap end of a connecting rod of steam engine is joined by

Spigot socket cotter joint
Knuckle joint
Gib of cotter joint
Sleeve and cotter joint

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

20°
45°
10°
30°

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Machine Design
Fibrous fracture occurs in

Brittle material
Elastic material
Ductile material
Hard material

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Machine Design
The coefficient of friction between the belt and pulley depends upon the

Speed of belt
Material of belt and pulley
Slip of belt
All of these

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Machine Design
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.

Fully
Partially
Either A or B
None of these

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