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Machine Design

Machine Design
The cross-section of the arm of a bell crank lever is

Any one of these
Rectangular
I-section
Elliptical

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

180°
160°
135°
90°

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

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

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Machine Design
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as

T cosecφ
T sec²φ
T sec³φ
T/sec³φ

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Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

2
1
4
43832

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Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Backlash
Clearance
Face width
Working depth

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