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Machine Design

Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

25
17
21
15

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

15 times
20 times
5 times
10 times

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Machine Design
For general industrial machinery, the ratio of the length of journal to its diameter is taken as

5 to 10
3 to 5
0.5 to 1
1 to 2

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Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

Smaller
Medium
Greater
None of these

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Machine Design
A hot short metal is

Brittle when cold
Brittle under all conditions
Ductile at high temperature
Brittle when hot

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Machine Design
The spring mostly used in gramophones is

Flat spiral spring
Helical spring
Volute spring
Conical spring

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