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Machine Design

Machine Design
A steel containing _________ 0.8% carbon is known as hypo-eutectoid steel.

Greater than
None of these
Equal to
Less than

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Machine Design
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

0.8 d
1.57 d
1.8 d
1.2 d

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Machine Design
The stress induced in the belt is,

Tensile stress
Torsional shear stress
Compressive stress
Direct shear stress

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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

5 mm
25 mm
15 mm
10 mm

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Machine Design
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

0.01 micron
10 microns
1 micron
0.1 micron

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

More than 50%
Less than 50%
Equal to 50%
None of these

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