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Theory of Machine

Theory of Machine
Which of the following mechanism is obtained from lower pair?

Valve and valve gears
Pantograph
All of these
Gyroscope

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Theory of Machine
In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

log(x₁.x₂)
log(x₁/x₂)
x₁/x₂
loge(x₁/x₂)

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Theory of Machine
The Kutzbach criterion for determining the number of degrees of freedom (n) is (where l = number of links, j = number of joints and h = number of higher pairs)

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

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

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Theory of Machine
A mechanism consisting of four links is called a __________ mechanism.

Compound
Binary
None of these
Simple

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Theory of Machine
The Coriolis component of acceleration leads the sliding velocity by

180°
135°
45°
90°

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