For the brake to be self locking, the force P at C shown in the below figure, should<br> <img src="/images/question-image/mechanical-engineering/theory-of-machine/1528355492-42.JPG" title="Theory of Machine mcq question image" alt="Theory of Machine mcq question image">

In a differential band brake as shown in the below figure, the drum rotates anticlockwise and the greater tension T₁ acts at A and smaller tension T₂ at B. Length OA is greater than length OB. In order to apply the brake, the force P at C should
Theory of Machine mcq question image

A

Be zero

B

Act in upward direction

C

Act in downward direction

D

None of the above

In a differential band brake as shown in the below figure, if the length OB is greater than OA, then the force P at C should act in the downward direction.
Theory of Machine mcq question image

A

Yes

B

No

C

Unpredictable

D

None of these

The pictorial view of the frustum of a square pyramid is shown in figure 'X'. Its top view, when viewed in the direction of the arrow, will look like which of the given alternatives 1, 2, 3 and 4?
Figure Formation and Analysis mcq question image

Figure Formation and Analysis mcq question image

A

1

B

2

C

3

D

4

ABCD is a four bar mechanism in which AB = 310 mm and CD = 450 mm. AB and CD are both perpendicular to the fixed link AD, as shown in the below figure. If the velocity of B at this condition is v. Then the velocity of C is
Theory of Machine mcq question image

A

$$\frac{1}{3}$$ v

B

$$\frac{2}{3}$$ v

C

$$\frac{3}{2}$$ v

D

$$\frac{9}{4}$$ v

For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a
Theory of Machine mcq question image

A

30° V-engine

B

60° V-engine

C

120° V-engine

D

150° V-engine

A torsional system with discs of moment of inertia $${I_1}$$ and $${I_2}$$ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to
Theory of Machine mcq question image

A

$${\text{G}} \times {I_2}$$

B

$${{\text{G}}^2} \times {I_2}$$

C

$$\frac{{{I_2}}}{{\text{G}}}$$

D

$$\frac{{{I_2}}}{{{{\text{G}}^2}}}$$

In the two rotor system as shown in the below figure $$\left( {{l_1} Theory of Machine mcq question image

A

Between $${l_1}$$ and $${l_2}$$ but nearer $${l_1}$$

B

Between $${l_1}$$ and $${l_2}$$ but nearer to $${l_2}$$

C

Exactly in the middle of the shaft

D

Nearer to $${l_1}$$ but outside

In the below figure, PC is the connecting rod and OC is the crank making an angle $$\theta $$ with the line of stroke PO and rotates with uniform angular velocity at $$\omega $$ 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 mcq question image

A

Infinity

B

Zero

C

Any +ve value

D

Any -ve value

In the below figure, PC is the connecting rod and OC is the crank making an angle $$\theta $$ with the line of stroke PO and rotates with uniform angular velocity at $$\omega $$ rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, if N coincides with O, then
Theory of Machine mcq question image

A

Acceleration and velocity of the piston P is zero

B

Acceleration and velocity of the piston P is maximum

C

Acceleration of the piston P is zero and its velocity is maximum

D

Acceleration of the piston P is maximum and its velocity is zero

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 $$\omega $$ 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
Theory of Machine mcq question image

A

$${\omega ^2}$$ × NO

B

$${\omega ^2}$$ × CO

C

$${\omega ^2}$$ × CN

D

$${\omega ^2}$$ × QN

For the brake to be self locking, the force P at C shown in the below figure, should

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