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Machine Design

Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

60
120
90
100

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Machine Design
The power transmitted by means of a belt depends upon

Velocity of the belt
Tension under which the belt is placed on the pulleys
All of these
Arc of contact between the belt and the smaller pulley

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/σt
pd/2σt
pd/3σt
pd/4σt

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Machine Design
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

2εc + εl
εc² + εl
εc + 2εl
εc + εl²

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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

Brown colour
White colour
Grey colour
Yellow colour

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Machine Design
In cylindrical cams, the follower moves

In a direction parallel to the cam axis
Along the cam axis
In a direction perpendicular to the cam axis
In any direction irrespective of cam axis

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