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Machine Design

Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

6 mm
7 mm
4 mm
5 mm

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Machine Design
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to

1.5 d
1.75 d
1.25 d
1 d

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Machine Design
A rivet is specified by

Length of rivet
Shank diameter
Length of tail
Type of head

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

21
15
25
17

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Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.5
0.25
0.6
0.2

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Machine Design
Multiple threads are used to secure

High load lifting capacity
High efficiency
High mechanical advantage
Low efficiency

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