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Theory of Machine

Theory of Machine
Ackermann steering gear consists of

Sliding pairs
Turning pairs
Rolling pairs
Higher pairs

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Theory of Machine
Which of the following is a turning pair?

Ball and a socket joint
Lead screw of a lathe with nut
Piston and cylinder of a reciprocating steam engine
Shaft with collars at both ends fitted into a circular hole

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Theory of Machine
A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

2ωv²
ωv
ω²v
2ωv

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

Slightly more than 45 mm
45 mm
Slightly less than 45 mm
95 mm

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Theory of Machine
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

0.4985/√δ
Any one of the listed here
1/2π × √(g/δ)
1/2π × √(s/m)

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Theory of Machine
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the

1.5
0.5
2
1

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