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Machine Design

Machine Design
The suitable material for belt used in flour mill is

Leather
Balata gum
Canvas or cotton duck
Rubber

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

Cotter joint
Knuckle joint
Universal joint
Oldham coupling

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Machine Design
Which of the following is not correct procedure to increase the fatigue limit?

Surface decarburisation
Cold working
Under stressing
Shot peening

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Machine Design
In the levers of third type, the mechanical advantage is __________ one.

More than
Equal to
Less than
None of these

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Machine Design
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

15 mm
10 mm
25 mm
5 mm

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Machine Design
The included angle for the British Association thread is

47.3°
60°
29°
55°

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