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Machine Design

Machine Design
The spring mostly used in gramophones is

Conical spring
Flat spiral spring
Helical spring
Volute spring

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

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

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Machine Design
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.

Partially
None of these
Either A or B
Fully

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Machine Design
In static loading, stress concentration is more serious in

Brittle as well as ductile materials
Ductile materials
Elastic materials
Brittle materials

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Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

0.5 d
1.25 d
d
0.75 d

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Machine Design
The buckling load will be maximum for a column, if

Both ends of the column are hinged
One end of the column is clamped and the other end is free
One end of the column is hinged and the other end is free
Both ends of the column are clamped

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