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Machine Design

Machine Design
The stress in the threaded part of the bolt will be __________ as compared to the shank.

Same
Lower
None of these
Higher

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Machine Design
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

5 mm
10 mm
15 mm
25 mm

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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
0.99
0.98
0.96

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Machine Design
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

1.5 d
2 d
2.5 d
d

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Machine Design
Cast iron pipes are mainly used

All of these
In pressure lubrication systems on prime movers
In water and sewage systems
For conveying steam

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Square bearing
Long bearing
Short bearing
Medium bearing

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