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Machine Design

Machine Design
The size of a gear is usually specified by

Pressure angle
Pitch circle diameter
Circular pitch
Diametral pitch

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Machine Design
In Vickers hardness testing, the pyramid indentor apex is

122°
40°
152°
136°

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Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

6 mm
7 mm
4 mm
5 mm

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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
Fully
Either A or B
None of these

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Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.2
0.65
0.5
0.35

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Machine Design
Silver based solder is used for

Fusion welding
Brazing
Soft soldering
Flaring

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