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Theory of Machine

Theory of Machine
The brake commonly used in railway trains is

Band brake
Internal expanding brake
Band and block brake
Shoe brake

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Theory of Machine
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)

ω × AB
ω × (AB)²
ω² × AB
(ω × AB)²

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Theory of Machine
Which of the below are inversions of slider crank mechanism? 1. Oscillating cylinder engine mechanism 2. Toggle mechanism 3. Radial cylinder engine mechanism 4. Quick return mechanism

2, 3 and 4
1, 2 and 3
1, 2 and 4
1, 3 and 4

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Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector

Lags by 90°
Leads by 180°
Leads by 90°
Is in phase

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

Grasshopper mechanism
Watt mechanism
Tchebicheff mechanism
Peaucellier's mechanism

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Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Not exist
None of these
Depend on position of crank
Exist

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