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Machine Design

Machine Design
The draw of cotter need not exceed

3 mm
5 mm
10 mm
20 mm

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Machine Design
The design of shafts made of brittle materials is based on

Rankine's theory
Guest's theory
St Venant's theory
Von Mises theory

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Machine Design
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Greater than 30d
Between 20d and 30d
Less than 20d
Equal to inside diameter of pipe

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Machine Design
A tapered key which fits in a key way in the hub and is flat on the shaft, is known as

Flat saddle key
Wood ruff key
Gib-head key
Feather key

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Machine Design
In block brakes, the ratio of shoe width to wheel diameter is taken between

0.1 and 0.25
0.75 and 1
0.50 and 0.75
0.25 and 0.50

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Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

80 to 90%
70 to 83%
63 to 70%
45 to 60%

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