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Theory of Machine

Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L
L - 1
L + 2
L + 1

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Theory of Machine
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

270° and 360°
180° and 270°
90° and 180°
45° and 225°

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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

1/24
12
4/15
1/8

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Theory of Machine
The example of higher pair is

Ball and roller bearings
Gears, cams
Belt, rope and chain drives
All of these

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Theory of Machine
Carnot cycle is

an irreversible cycle
a quasi static cycle
a reversible cycle
a semi-reversible cycle

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Theory of Machine
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is

h/(kG² + h²)
(kG² + h²)/h²
h²/(kG² + h²)
(kG² + h²)/h

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