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Machine Design

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

Double
One-third
One-half
One-fourth

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Machine Design
If a bearing is designated by the number 305, it means that the bearing is of

Medium series whose bore is 25 mm
Light series whose bore is 25 mm
Medium series whose bore is 5 mm
Light series whose bore is 5 mm

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Machine Design
The radial distance from the __________ to the clearance circle is called working depth.

Addendum circle
Pitch circle
None of these
Dedendum circle

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Machine Design
The edges of a boiler plate are bevelled to an angle of

30°
80°
60°
45°

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° full depth involute system
20° stub system
14½° composite and full depth involute system
None of these

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Machine Design
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

Grey colour
Brown colour
Yellow colour
White colour

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