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Theory of Machine

Theory of Machine
If the pressure angle is __________, a reciprocating follower will jam in its bearings.

Large
Too small
Small
Too large

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Theory of Machine
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by

ω² × NO
ω² × QN
ω² × CO
ω² × CN

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Theory of Machine
Sense of tangential acceleration of a link

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

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Theory of Machine
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

0° and 90°
Both (A) and (B)
180° and 360°
None of these

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Theory of Machine
The height of a Watt's governor is

Inversely proportional to (speed)²
Inversely proportional to speed
Directly proportional to speed
Directly proportional to (speed)²

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Theory of Machine
Relationship between the number of links (L) and number of pairs (P) is

P = 2L - 2
P = 2L - 4
P = 2L + 2
P = 2L + 4

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