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MACHINE DESIGN

Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

None of these
Shear strength is greater than crushing strength
Shear strength is equal to crushing strength
Shear strength is less than crushing strength

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Machine Design
The dynamic tooth load is due to

Deflections of teeth under load
All of these
Irregularities in tooth profiles
Inaccuracies of tooth spacing

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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
1.2 d
1.8 d
1.57 d

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Machine Design
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

15 kN
22.5 kN
10.6 kN
7.5 kN

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Machine Design
In a partial journal bearing, the angle of contact of the bearing with the journal is

180°
360°
270°
120°

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