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Machine Design

Machine Design
The suitable material for belt in agricultural machinery is

Rubber
Cotton duck
Balata gum
Leather

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Machine Design
Whether any core is required in wire ropes

Rarely
Sometimes
Yes
No

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Machine Design
For tight leakage joints, following type of thread is best suited

Square
Metric
Buttress
NPT (national pipe threads).

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Machine Design
Which of the following welded joint is designed for shear strength?

Butt welded joint
Parallel fillet welded joint
Transverse fillet welded joint
All of these

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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

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

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Machine Design
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.97
0.98
0.96
0.99

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