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Machine Design

Machine Design
The spring mostly used in gramophones is

Helical spring
Volute spring
Conical spring
Flat spiral spring

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Machine Design
I.S. specifies following total number of grades of tolerances

16
18
22
20

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Machine Design
The rolling contact bearings as compared to sliding contact bearings have

Low starting and low running friction except at very high speeds
Accuracy of shaft alignment
All of these
Small overall dimensions

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Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

120
100
60
90

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Machine Design
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.

Sixteen times
Four times
Twice
Eight times

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Machine Design
Guest's theory of failure is applicable for following type of materials

Brittle
Elastic
Plastic
Ductile

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