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Machine Design

Machine Design
The material commonly used for machine tool bodies is

Mild steel
Cast iron
Brass
Aluminium

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Machine Design
The strength of the unriveted plate (P) per pitch length is equal to

(p - d) t.σt
p.t.σt
(p - d) σt
p.d.σt

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Machine Design
The face angle of a bevel gear is equal to

Pitch angle - addendum angle
Pitch angle + dedendum angle
Pitch angle + addendum angle
Pitch angle - dedendum angle

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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)

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

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Machine Design
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

4
6
10
8

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Machine Design
In second type of levers,

Fulcrum is in between the load and effort
Load is in between the fulcrum and effort
None of these
Effort is in between the fulcrum and load

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