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Theory of Machine

Theory of Machine
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be

Maximum
Minimum
Zero
None of these

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Theory of Machine
The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to

135° and 315°
270° and 360°
0° and 90°
90° and 180°

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Theory of Machine
Kinematic pairs are those which have two elements that

Are held together
Permit relative motion
Have line contact
Have surface contact

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Theory of Machine
The Klein's diagram is used when

Crank has nonuniform angular acceleration
Crank has nonuniform angular velocity
Crank has uniform angular velocity
Crank has uniform angular acceleration

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

Large
Too small
Too large
Small

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Theory of Machine
The main disadvantage of the sliding pair is that it is

Both (A) and (B) above
Bulky
Wears rapidly
Difficult to manufacture

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