Weak material of the belt

Weak material of the pulley

Uneven extensions and contractions of the belt when it passes from tight side to slack side

Expansion of the belt

C. Uneven extensions and contractions of the belt when it passes from tight side to slack side

tan (α + φ)/tanα

tanα/tan (α +φ)

tan (α - φ)/tanα

tanα/tan (α - φ)

6 times more

6 times less

2.44 times more

2.44 times less

Straight line

Circle

Ellipse

Parabola

(1/2) μ W (r₁ + r₂)

(2/3) μ W (r₁ + r₂)

(1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]

(2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]

All four pairs are turning

Three pairs turning and one pair sliding

Two pairs turning and two pairs sliding

One pair turning and three pairs sliding

Surface of the top of tooth

Surface of tooth above the pitch surface

Width of tooth below the pitch surface

Width of tooth measured along the pitch circle

(S₁ + S₂)/h

(S₁ - S₂)/h

(S₁ + S₂)/2h

(S₁ - S₂)/2h

0°

90°

180°

360°

Resultant force is equal to zero

Resultant couple is equal to zero

Resultant force and resultant couple are both equal to zero

Resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero

Crank has a uniform angular velocity

Crank has non-uniform velocity

Crank has uniform angular acceleration

Crank has uniform angular velocity and angular acceleration

sinφ + sinα = b/c

cosφ - sinα = c/b

cotφ - cotα = c/b

tanφ + cotα = b/c

No node

One node

Two nodes

Three nodes

Less

More

Same

None of these

1.4 N-s/m

18.52 N-s/m

52.92 N-s/m

529.2 N-s/m

Displacement diagram

Velocity diagram

Acceleration diagram

All of the above

m/(m + M)

M/(m + M)

(m + M)/m

(m + M)/M

Primary forces and couples must be balanced

Secondary forces and couples must be balanced

Both (A) and (B)

None of these

P = W tan(α - φ)

P = W tan(α + φ)

P = W tan(φ - α)

P = W cos(α + φ)

The difference between the maximum and minimum energies is called maximum fluctuation of energy

The coefficient of fluctuation of speed is the ratio of maximum fluctuation of speed to the mean speed

The variations of energy above and below the mean resisting torque line is known as fluctuation of energy

None of the above

Bulky

Wears rapidly

Difficult to manufacture

Both (A) and (B) above

Dynamically balanced

Statically balanced

Statically and dynamically balanced

Not balanced

0°

90°

180°

270°

Governor A is more sensitive than governor B

Governor B is more sensitive than governor A

Both governors A and B are equally sensitive

None of the above

Shear stress

Bending stress

Tensile stress

Compressive stress

2 links

3 links

4 links

5 links

Shaft tends to vibrate in longitudinal direction

Torsional vibrations occur

Shaft tends to vibrate vigorously in transverse direction

Combination of transverse and longitudinal vibration occurs

Simple gear train

Compound gear train

Reverted gear train

Epicyclic gear train

_{c} = ar + b

_{c} = ar - b

_{c} = ar

_{c} = a/r + b

10° to 20°

20° to 30°

30° to 40°

60° to 80°

Motion of an I.C. engine valve

Motion of the shaft between a footstep bearing

Piston reciprocating inside an engine cylinder

All of the above