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Machine Design

Machine Design
The material commonly used for machine tool bodies is

Mild steel
Cast iron
Brass
Aluminium

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Machine Design
A V-belt designated as B 4430 LP has

4430 mm as diameter of small pulley
4430 mm as diameter of large pulley
4430 mm as nominal pitch length
4430 mm as centre distance between pulleys

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Machine Design
The railway carriage couplings have

Square threads
Acme threads
Buttress threads
Knuckle threads

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Machine Design
The included angle in unified of American National threads is

60°
47°
55°
29°

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Machine Design
The resilience of a bolt may be increased by

Decreasing its shank diameter
Increasing its shank diameter
Increasing its length
Decreasing its length

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Machine Design
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

2 d
1.5 d
1 d
2.5 d

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