Questions and answers for exam Preparation

MCQs

Total Questions : 1709 | Page 164 of 171 pages

Question 1631. Buoyant force is___________________?

resultant force acting on a floating body
equal to the volume of liquid displaced
force necessary to keep a body in equilibrium
the resultant force on a body due to the fluid surrounding it
none of the above

Discuss Question

Answer: Option D. -> the resultant force on a body due to the fluid surrounding it
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1632. According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to __________________?

the weight of the body
more than the weight of the body
less than the weight of the body
weight of the fluid displaced by the body
weight of body plus the weight of the fluid displaced hy the body

Discuss Question

Answer: Option D. -> weight of the fluid displaced by the body
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1633. Ratio of inertia force to surface Jension is known as ________________________?

Mach number
Froude number
Reynold’s number
Weber’s number
none of the above

Discuss Question

Answer: Option D. -> Weber’s number
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1634. When a body floating in a liquid, is displaced slightly, it oscillates about ___________________?

e.g. of body
center of pressure
center of buoyancy
metacentre
liquid surface

Discuss Question

Answer: Option D. -> metacentre
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1635. A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

900 minutes
4 minutes
4 x (225)3/2 minutes
4 (225)1/3 minutes
4 x V225 minutes

Discuss Question

Answer: Option E. -> 4 x V225 minutes
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1636. For a floating body to be in stable equilibrium, its metacentre should be_________________ ?

below the center of gravity
below the center of buoyancy
above the center of buoyancy
between e.g. and center of pressure
above the center of gravity

Discuss Question

Answer: Option E. -> above the center of gravity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1637. A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 : 5
1 : 2.5
1 :25
1:V5″
1 : 53/2

Discuss Question

Answer: Option A. -> 1 : 5
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1638. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?