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Machine Design

Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/4
3d/4
d/3
d/2

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Machine Design
The maximum shear stress theory is used for

Ductile materials
Nonferrous materials
Plastic materials
Brittle materials

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Machine Design
Oldham coupling is used to connect two shafts

Which are perfectly aligned
Which are not in exact alignment
Whose axes intersect at a small angle
Which have lateral misalignment

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

3.6 N/mm² tension
7.2 N/mm² tension
3.6 N/mm² compression
7.2 N/mm² compression

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Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

p.d.σt
p.t.σt
(p - d) t.σt

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Machine Design
The notch angle of the Izod impact test specimen is

10°
30°
45°
20°

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