THEORY OF MACHINE QUIZ

All of these

The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another

A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work

The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only

Soundness would depend upon which link is kept fixed

Kinematically sound

Not sound

Data is not sufficient to determine same

½μWR

μwr

²/₃ μWR

¾μWR

The friction force is independent of me area of contact.

The friction force is directly proportional to the normal force.

All of these

The friction force is dependent on the materials of the contact surfaces.

π (r₁ - r₂) + (r₁ - r₂)²/x + 2x

π (r₁ - r₂) + (r₁ + r₂)²/x + 2x

π (r₁ + r₂) + (r₁ - r₂)²/x + 2x

π (r₁ + r₂) + (r₁ + r₂)²/x + 2x

Equal to

None of these

Less than

Greater than

Reduce slip

Ensure uniform loading

Reduce vibration

Ensure proper alignment

(ω₁ + ω₂) r

(ω₁ - ω₂) r

(ω₁ - ω₂) 2r

ω₁.ω₂.r

At the centre of curvature

At the centre of circle

At the pin joint

On their point of contact

200 to 300 r.p.m.

100 to 200 r.p.m.

80 to 100 r.p.m.

60 to 80 r.p.m.