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Machine Design

Machine Design
The difference between the upper limit and lower limit of a dimension is called

Actual size
Tolerance
Basic size
Nominal size

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Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

100
60
90
120

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Machine Design
The most important dimension in the design of a nut is

Pitch diameter
Inside diameter
Outside diameter
Height

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(WD/ πd3) × K
(2WD/ πd3) × K
(4WD/ πd3) × K
(8WD/ πd3) × K

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Machine Design
The arms of the pulleys for flat belt drive have

Major axis in plane of rotation
Major axis twice the minor axis
Elliptical cross-section
All the three characteristics

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Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

Smaller
Greater
None of these
Medium

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