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Theory of Machine

Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

n(n - 1)/2
n/2
n
n - 1

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Theory of Machine
Which of the following would constitute a link?

Piston rod and cross head
Piston and piston rod
Piston, piston rod and cross head
Piston, crank pin and crank shaft

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Theory of Machine
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)

ω² √(x² - r²)
ω √(x² - r²)
ω √(r² - x²)
ω² √(r² - x²)

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Theory of Machine
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?

Meyer's expansion valve
Governor
Flywheel
D-slide valve

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Theory of Machine
The flank of the tooth is the surface of the tooth __________ the pitch surface.

At
Below
Above
None of these

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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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