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Machine Design

Machine Design
The cross-section of the arm of a bell crank lever is

Any one of these
Rectangular
Elliptical
I-section

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Machine Design
The process extensively used for making bolts and nuts is

Cold heading
Extrusion
Hot piercing
Cold peening

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Machine Design
When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as

Crown bevel gears
Miter gears
Angular bevel gears
Internal bevel gears

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Machine Design
A screw is specified by its

Major diameter
Pitch
Pitch diameter
Minor diameter

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Machine Design
The included angle for the British standard whitworth thread is

55°
29°
47.5°
60°

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Machine Design
Deep groove ball bearings are used for

Small angular displacement of shafts
Heavy thrust load only
Combined thrust and radial loads at high speed
Radial load at high speed

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