Questions and answers for exam Preparation

MCQs

Total Questions : 543 | Page 31 of 55 pages

Question 301. Which of the following mechanisms produces mathematically an exact straight line motion?

Grasshopper mechanism
Watt mechanism
Peaucellier's mechanism
Tchebicheff mechanism

Discuss Question

Answer: Option C. -> Peaucellier's mechanism

Question 302. If the opposite links of a four bar linkage are equal, the links will always form a

Triangle
Rectangle
Parallelogram
Pentagon

Discuss Question

Answer: Option C. -> Parallelogram

Question 303. 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

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

Discuss Question

Answer: Option C. -> Acceleration of the piston P is zero and its velocity is maximum

Question 304. Angle of action of cam is defined as the angle

Of rotation of the cam for a definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in the highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Moved by the cam from beginning of ascent to the termination of descent

Discuss Question

Answer: Option D. -> Moved by the cam from beginning of ascent to the termination of descent

Question 305. When a body is subjected to transverse vibrations, the stress induced in a body will be

Shear stress
Bending stress
Tensile stress
Compressive stress

Discuss Question

Answer: Option B. -> Bending stress

Question 306. The periodic time of one oscillation for a simple pendulum is

$$2\pi \sqrt {\frac{{\text{g}}}{l}} $$
$$\frac{1}{{2\pi }}\sqrt {\frac{{\text{g}}}{l}} $$
$$2\pi \sqrt {\frac{l}{{\text{g}}}} $$
$$\frac{1}{{2\pi }}\sqrt {\frac{l}{{\text{g}}}} $$

Discuss Question

Answer: Option C. -> $$2\pi \sqrt {\frac{l}{{\text{g}}}} $$

Question 307. Which gear train is used for higher velocity ratios in a small space?

Simple gear train
Compound gear train
Reverted gear train
Epicyclic gear train

Discuss Question

Answer: Option D. -> Epicyclic gear train

Question 308. The number of links and instantaneous centers in a reciprocating engine mechanism are

4, 4
4, 5
5, 4
4, 6

Discuss Question

Answer: Option D. -> 4, 6

Question 309. Angle of dwell of cam is defined as the angle

During which the follower returns to its initial position
Of rotation of the cam for definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in the highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Discuss Question

Answer: Option C. -> Through which the cam rotates during the period in which the follower remains in the highest position

Question 310. Angle of descent of cam is defined as the angle

During which the follower returns to its initial position
Of rotation of the cam for a definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in the highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Discuss Question

Answer: Option A. -> During which the follower returns to its initial position