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Machine Design

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

152°
40°
136°
122°

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Machine Design
Idler pulley is used for

For applying tension
All of these
Increasing velocity ratio
Changing the direction of motion of belt

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Machine Design
A connecting rod subjected to an axial load may buckle with

Z-axis
Y-axis as neutral axis
X-axis as neutral axis
X-axis or Y-axis as neutral axis

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Dynamic load
Static as well as dynamic load
Completely reversed load
Static load

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Machine Design
The centrifugal tension in belts

Decreases the power transmitted
Increases the belt tension without increasing power transmission
Increase the wrap angle
Increases the power transmitted

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Machine Design
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

F
F + P
F.P
P

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