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Theory of Machine

Theory of Machine
Module of a gear is

2D/T
D/T
T/D
2T/D

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Theory of Machine
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as

Swaying couple
Tractive force
None of these
Hammer blow

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Theory of Machine
In a flat collar pivot bearing, the moment due to friction is proportional to

(r₁³ - r₂³)/(r₁² - r₂²)
(r₁³ - r₂³)/(r₁ - r₂)
(r₁² - r₂²)/(r₁ - r₂)
(r₁² - r₂²)/(r₁ + r₂)

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a = 0 and b is +ve
a is +ve and b is also +ve
a is +ve and b = 0
a is +ve and b is -ve

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Theory of Machine
For fluctuating loads, well suited bearing is

Roller bearing
Needle roller bearing
Thrust bearing
Ball bearing

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Theory of Machine
The velocity of a body moving with simple harmonic motion is __________ at the mean position.

Maximum
Zero
None of these
Minimum

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