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Machine Design

Machine Design
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

One-half
Double
One-third
One-fourth

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Machine Design
The shear plane in case of bolts should

Be parallel to axis of bolt
Be across threaded portion of shank
Never be across the threaded portion
Be normal to threaded portion of shank

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Machine Design
The material commonly used for crane hooks is

Wrought iron
Aluminium
Cast iron
Mild steel

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

270°
180°
360°
120°

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Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Metric
Buttress
Square
Acme

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Machine Design
Which is positive drive?

Flat belt drive
Timing belt
Crossed belt drive
V belt drive

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