Questions and answers for exam Preparation

MCQs

Total Questions : 1709 | Page 149 of 171 pages

Question 1481. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?
1. the ball will move to the front
2. the bubble will move to the front
3. the ball will move to the rear
4. the bubble will move to the rear
Find out which of the above statements are correct ?

(1) and (2)
(1)and(4)
(2) and (3)
(3) and (4)

Discuss Question

Answer: Option B. -> (1)and(4)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1482. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as__________________?

center of gravity
center of buoyancy
center of pressure
metacentre

Discuss Question

Answer: Option C. -> center of pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1483. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is___________________?

zero
one-fourth its value when cylinder was full
one-half its value when cylinder was full
cannot be predicted from the given data

Discuss Question

Answer: Option A. -> zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1484. When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies________________?

linearly with radial distance
as the square of the radial distance
inversely as the square of the radial distance
inversely as the radial distance

Discuss Question

Answer: Option B. -> as the square of the radial distance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1485. Which of the following is an incorrect statement_______?

Coefficient of contraction of a venturimeter is unity
Flow nozzle is cheaper than venturimeter but has higher energy loss
Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined
None of the above statement is correct.

Discuss Question

Answer: Option D. -> None of the above statement is correct.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1486. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will________________?

rise until its weight equals the buoyant force
tend to move downward and it may finally sink
float
none of the above

Discuss Question

Answer: Option B. -> tend to move downward and it may finally sink
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1487. The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is______________?

at the centroid of the submerged area
always above the centroid of the area
always below the centroid of the area
none of the above

Discuss Question

Answer: Option C. -> always below the centroid of the area
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1488. A floating body is said to be in a state of stable equilibrium_________________?

when its metacentric height is zero
when the metacentre is above the centre of gravity
when the metacentre is below the centre of gravity
only when its centre of gravity is below its centre of buoyancy

Discuss Question

Answer: Option B. -> when the metacentre is above the centre of gravity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1489. The increase in meta centric height_________________?
1. increases stability
2. decreases stability
3. increases comfort for passengers
4. decreases comfort for passengers
The correct answer is?

(1) and (3)
(1)and(iv)
(2) and (3)
(2) and (4)

Discuss Question

Answer: Option B. -> (1)and(iv)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1490. A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of________________?