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Theory of Machine

Theory of Machine
For fluctuating loads, well suited bearing is

Needle roller bearing
Thrust bearing
Roller bearing
Ball bearing

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Theory of Machine
The brake commonly used in railway trains is

Band brake
Shoe brake
Band and block brake
Internal expanding brake

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Theory of Machine
The ratio of the driving tensions for V-belts is __________ times that of flat belts.(Where β = Semi-angle of the groove)

secβ
cosecβ
sinβ
cosβ

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Theory of Machine
The primary unbalanced force is maximum _________ in one revolution of the crank.

Eight times
Four times
Twice
Sixteen times

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Theory of Machine
There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is

1/8
4/15
1/24
12

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Theory of Machine
A foot step bearing and rotor of a vertical turbine form examples of

Completely constrained motion
Partially constrained motion
Incompletely constrained motion
Successfully constrained motion

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