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Machine Design

Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Vickers
Rockwell
Brinell
None of these

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Machine Design
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

Greater than 1/10
None of these
Less than 1/10
Equal to 1/10

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Machine Design
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

Yellow colour
Grey colour
White colour
Brown colour

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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.

Twice
Equal to
Four times
Three times

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Machine Design
In a horizontal flat belt drive, it is customary to use

Idler pulley
Bottom side of belt as slack side
None of these
Top side of belt as slack side

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Both the shafts are equally good
Shaft B is better than shaft A
Shaft A is better than shaft B
None of these

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