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Machine Design

Machine Design
A locking device extensively used in automobile industry is a

Ring nut
Castle nut
Sawn nut
Jam nut

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Machine Design
When two springs are in series (having stiffness K), the equivalent stiffness will be

K
2K
K/4
K/2

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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

10 mm
5 mm
15 mm
25 mm

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Machine Design
Gears are casted by

Sand mould casting
Slush casting
Permanent mould casting
Centrifugal casting

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

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

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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

d
2.5 d
1.5 d
2 d

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