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 is _________ when the crank OC and connecting rod PC are at right angles to each other.

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 is _________ when the crank OC and connecting rod PC are at right angles to each other.

Any +ve value

Any -ve value

Zero

Infinity

Any +ve value

Any -ve value

Zero

Infinity

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Theory of Machine
A watt's governor can work satisfactorily at speeds from

60 to 80 r.p.m.

100 to 200 r.p.m.

80 to 100 r.p.m.

200 to 300 r.p.m.

60 to 80 r.p.m.

100 to 200 r.p.m.

80 to 100 r.p.m.

200 to 300 r.p.m.

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Theory of Machine
Which of the following is false statement in respect of differences between machine and structure?

Efficiency of machines as well as structures is below 100 %

Machines transmit mechanical work, whereas structures transmit forces

In machines, relative motion exists between its members, whereas same does not exist in case of structures

Machines modify movement and work, whereas structures modify forces

Efficiency of machines as well as structures is below 100 %

Machines transmit mechanical work, whereas structures transmit forces

In machines, relative motion exists between its members, whereas same does not exist in case of structures

Machines modify movement and work, whereas structures modify forces

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Theory of Machine
To obviate axial thrust, following gear drive is used

Double helical gears having opposite teeth

Double helical gears having identical teeth

Mutter gears

Single helical gear in which one of the teeth of helix angle a is more

Double helical gears having opposite teeth

Double helical gears having identical teeth

Mutter gears

Single helical gear in which one of the teeth of helix angle a is more

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

(2/3) μ W R cosecα

(3/4) μ W R cosecα

μ W R cosecα

(1/2) μ W R cosecα

(2/3) μ W R cosecα

(3/4) μ W R cosecα

μ W R cosecα

(1/2) μ W R cosecα

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Theory of Machine
The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)

tanα = c/2b

cosα = c/b

sinα = b/c

cotα = c/2b

tanα = c/2b

cosα = c/b

sinα = b/c

cotα = c/2b

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Theory of Machine

Theory of Machine A watt's governor can work satisfactorily at speeds from

Theory of Machine Which of the following is false statement in respect of differences between machine and structure?

Theory of Machine To obviate axial thrust, following gear drive is used

Theory of Machine The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

Theory of Machine The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)

Theory of Machine
A watt's governor can work satisfactorily at speeds from

Theory of Machine
Which of the following is false statement in respect of differences between machine and structure?

Theory of Machine
To obviate axial thrust, following gear drive is used

Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

Theory of Machine
The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)