Questions and answers for exam Preparation

MCQs

Total Questions : 2100 | Page 27 of 210 pages

Question 261. In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

x₁/x₂
log(x₁/x₂)
loge(x₁/x₂)
log(x₁.x₂)

Discuss Question

Answer: Option B. -> log(x₁/x₂)

Question 262. The two parallel and coplanar shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is known as

Spur gearing
Helical gearing
Bevel gearing
Spiral gearing

Discuss Question

Answer: Option A. -> Spur gearing

Question 263. The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as

Turning pair
Rolling pair
Sliding pair
Spherical pair

Discuss Question

Answer: Option A. -> Turning pair

Question 264. The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

Joining the corresponding points
Perpendicular to line as per (A)
Not possible to determine with these data
At 45° to line as per (A)

Discuss Question

Answer: Option A. -> Joining the corresponding points

Question 265. Which of the following property of the instantaneous center is correct?

A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.
The two rigid links have no linear velocity relative to each other at the instantaneous centre.
The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.
All of the above

Discuss Question

Answer: Option D. -> All of the above

Question 266. The periodic time of a compound pendulum is __________ when the distance between the point of suspension and the center of gravity is equal to the radius of gyration of the body about its center of gravity.

Zero
Minimum
Maximum
None of these

Discuss Question

Answer: Option B. -> Minimum

Question 267. In order to give a complete secondary balance of a multi-cylinder inline engine,

The algebraic sum of the secondary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero
Both (A) and (B)
None of these

Discuss Question

Answer: Option C. -> Both (A) and (B)

Question 268. The pair is known as a higher pair, when the relative motion between the elements of a pair is

Turning only
Sliding only
Rolling only
Partly turning and partly sliding

Discuss Question

Answer: Option D. -> Partly turning and partly sliding

Question 269. In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines

The algebraic sum of the primary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
Both (A) and (B)
None of these

Discuss Question

Answer: Option C. -> Both (A) and (B)

Question 270. Idler pulley is used