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Theory of Machine

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

Rolling pair
Sliding pair
Turning pair
Screw pair

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Theory of Machine
According to Kennedy's theorem, if three bodies move relatively to each other, their instantaneous centers will lie on a

Straight line
Rectangle
Parabolic curve
Triangle

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Theory of Machine
Sense of tangential acceleration of a link

Could be either same or opposite to velocity
Is opposite to that of velocity
Is perpendicular to that of velocity
Is same as that of velocity

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Theory of Machine
The unbalanced force due to revolving masses

Varies in magnitude but constant in direction
Varies in direction but constant in magnitude
Constant in magnitude and direction both
Varies in magnitude and direction both

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Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

G².I₂
I₂/G²
I₂/G
G.I₂

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Theory of Machine
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

Universal joint
Knuckle joint
Oldham's coupling
Flexible coupling

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