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Machine Design

Machine Design
The centre to centre distance between two consecutive rivets in a row, is called

Margin
Pitch
Diagonal pitch
Back pitch

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Machine Design
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

1680 d
1420 d
2080 d
2840 d

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

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Machine Design
The taper on a rectangular sunk key is

1 in 48
1 in 16
1 in 100
1 in 32

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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°
90°
135°

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Machine Design
Which one of the following loading is considered for the design of axles?

Bending moment only
Combined action of bending moment, twisting moment and axial thrust
Combined bending moment and twisting moments
Twisting moment only

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