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Theory of Machine

Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

180°
270°
90°
0°

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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
If the pressure angle is __________, a reciprocating follower will jam in its bearings.

Too small
Small
Large
Too large

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Theory of Machine
The Hooke's joint consists of:

Two forks
Three forks
One fork
Four forks

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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

0.5
2
1
1.5

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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)

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

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