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Machine Design

Machine Design
A steel containing _________ 0.8% carbon is known as hypo-eutectoid steel.

None of these
Greater than
Less than
Equal to

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Machine Design
In skew bevel gearing, the axes of shafts are

None of these
Non-intersecting and non-parallel and the teeth are straight
Intersecting and the teeth are curved
Non-intersecting and nonparallel and the teeth are curved

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Machine Design
Gear box is used

To obtain variable speeds
For speed reduction
To produce torque
To increase efficiency of system

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Machine Design
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.

Eight times
Twice
Sixteen times
Four times

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Machine Design
In Vickers hardness testing, the pyramid indentor apex is

40°
122°
152°
136°

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Machine Design
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

d = 1.6√t
d = √t
d = 6√t
d = 2√t

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