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Machine Design

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

Metric
Buttress
Square
NPT (national pipe threads).

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Machine Design
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation

151 d
138 d
124 d
168 d

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

Sawn nut
Jam nut
Ring nut
Castle nut

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Machine Design
A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as

Internal bevel gears
Angular bevel gears
Crown Bevel gears
Mitre gears

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Machine Design
Aircraft body is usually fabricated by

Casting
Welding
Pre-casting
Riveting

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Machine Design
The cam follower generally used in automobile engines is

Spherical faced follower
Flat faced follower
Knife edge follower
Roller follower

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