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Machine Design

Machine Design
A cotter joint is used to connect two __________ rods.

Perpendicular
Co-axial
None of these
Parallel

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Machine Design
Guest's theory is used for

Brittle materials
Elastic materials
Plastic materials
Ductile materials

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Machine Design
In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.

Equal to
Twice
Three times
Four times

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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)

2080 d
2840 d
1680 d
1420 d

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Machine Design
In the assembly of pulley, key and shaft

Pulley is made the weakest
Key is made the weakest
Key is made the strongest
All the three are designed for equal strength

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

6
8
2
4

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