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Theory of Machine

Theory of Machine
Davis steering gear consists of

Rolling pairs
Turning pairs
Sliding pairs
Higher pairs

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Theory of Machine
One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)

2π. √(δ/g)
1/2π. √(δ/g)
1/2π. √(g/δ)
2π. √(g/δ)

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Theory of Machine
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = 3(l - 1) - 2j
n = (l -1) - j
n = 2(l - 1) - 2j
n = 4(l - 1) - 3j

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Theory of Machine
The height of a Watt's governor is

Inversely proportional to speed
Directly proportional to (speed)²
Directly proportional to speed
Inversely proportional to (speed)²

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Theory of Machine
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become

16 tp
4 tp
tp /16
tp /4

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Theory of Machine
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

None of these
Remain same
Decreases
Increases

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