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Machine Design

Machine Design
The number of slots in a 25 mm castle nut is

8
4
2
6

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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)

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

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Machine Design
A screw is said to be over hauling screw, if its efficiency is

More than 50%
Equal to 50%
None of these
Less than 50%

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Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Bent
Crimped
Honed
Flared

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Machine Design
A coupling used to connect two perfectly aligned shafts, is

All of these
Muff coupling
Compression coupling
Flange coupling

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

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