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Machine Design

Machine Design
Screws used for power transmission should have

Very fine threads
High efficiency
Strong teeth
Low efficiency

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Machine Design
In testing a material for endurance strength, it is subjected to

Completely reversed load
Impact load
Dynamic load
Static load

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Machine Design
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as

M8
M6
M8 - 6d
M6 - 8d

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Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

0.8 d
d
0.5 d
1.2 d

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Machine Design
A steel containing up to 0.15% carbon is known as

Mild steel
Medium carbon steel
Dead mild steel
High carbon steel

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Machine Design
Which of the following property is essential for spring materials?

Stiffness
Ductility
Resilience
Plasticity

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