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Machine Design

Machine Design
The following type of nut is used with alien bolt

Hexagonal nut
Any one of the above
Slotted nut
Castle nut

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Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

Right hand
Left hand
None of these
Both A and B

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Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

180°
270°
360°
120°

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Machine Design
The notch angle of the Izod impact test specimen is

45°
10°
30°
20°

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Machine Design
In order to obtain bolt of uniform strength

Tighten die bolt properly
Increase its length
Increase shank diameter
Drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread

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Machine Design
The suitable material for belt in agricultural machinery is

Balata gum
Leather
Cotton duck
Rubber

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