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Theory of Machine

Theory of Machine
What is the number of instantaneous centers for an eight link mechanism?

8
28
30
15

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Theory of Machine
The Coriolis component of acceleration is taken into account for

Four bar chain mechanism
Slider crank mechanism
All of these
Quick return motion mechanism

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Theory of Machine
V-belts are usually used for

None of these
Long drives
Long and short drives
Short drives

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Theory of Machine
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

P = W cos(α + φ)
P = W tan(α - φ)
P = W tan(φ - α)
P = W tan(α + φ)

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Theory of Machine
The mechanism in which two are turning pairs and two are sliding pairs, is called a

Double slider crank chain
All of these
Elliptical trammel
Scotch yoke mechanism

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Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Negative throughout
Positive throughout
Negative during major portion of the stroke
Positive during major portion of the stroke

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