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Machine Design

Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

2 d
3 d
5 d
4 d

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Machine Design
The anti-friction bearings

Have high initial cost
Can carry both radial and thrust loads
Have low starting and low running friction at moderate speeds
All of these

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Machine Design
When two non-intersecting and non-coplanar shafts are connected by gears, the arrangement is known as

Bevel gearing
Helical gearing
Spiral gearing
Spur gearing

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Machine Design
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

Buttress threads
Knuckle threads
Acme threads
Square threads

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Machine Design
The acme threads are usually found on

Screw cutting lathes
Feed mechanism of machine tools
Spindles of bench vices
Railway carriage couplings

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Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/3
d/2
d/4
3d/4

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MORE MCQ ON Machine Design

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