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Theory of Machine

Theory of Machine
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)

(T.g)/3
√(3m/T)
√(T/3m)
T/3

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Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Data is not sufficient to determine same
Kinematically sound
Soundness would depend upon which link is kept fixed
Not sound

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Theory of Machine
In which of the following type of gear train the first gear and the last gear are co-axial.

Simple gear train
None of the listed here
Reverted gear train
Compound gear train

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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
1
2

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Theory of Machine
The lead screw of a lathe with nut forms a

Screw pair
Sliding pair
Rolling pair
Turning pair

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Theory of Machine
Which of the following mechanisms produces mathematically an exact straight line motion?

Grasshopper mechanism
Peaucellier's mechanism
Watt mechanism
Tchebicheff mechanism

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