MCQ Questions with Answers on Fluid Mechanics
1- Which of the following forces acts on a fluid at rest?
(A) Gravity force
(B) Hydro-static force
(C) Surface tension
(D) Viscous force
2- The parameters which determine the friction factor for turbulent flow in a rough pipe are
(A) Froude number and relative roughness
(B) Froude number and Mach number
(C) Reynolds number and relative roughness
(D) Nusselt number and relative roughness
3- Which of the following quantity is not dimensionless?
(A) Coefficient of discharge
(B) Kinematic viscosity
(C) Reynolds number
(D) Mach number
4- The ratio of specific weight of the liquid to the specific weight of a standard fluid is known as
(A) specific volume
(B) weight density
(C) specific gravity
(D) viscosity
5- What is dimension of surface tension?
(A) ML-1
(B) L2 T-1
(C) ML-1 T-1
(D) MT-2
6- _______ is a phenomenon by which a liquid rises into a thin glass tube above or below its general level.
(A) Surface tension
(B) Capillarity
(C) Cohesion
(D) Adhesion
7- Surface tension is due to
(A) Viscous forces
(B) Cohesion
(C) Adhesion
(D) The difference between adhesive and cohesive forces
8- The height of the free surface above any point is known as
(A) static head
(B) intensity of pressure
(C) surface tension
(D) viscosity
9- The power transmitted through the pipe is maximum when head lost due to friction in the pipe is equal to
(A) one-third of the total supply head
(B) one-fourth of the total supply head
(C) one-half of the total supply head
(D) one-fifth of the total supply head
10- A flow field which has only convective acceleration is
(A) A steady uniform flow
(B) An unsteady uniform flow
(C) A steady non-uniform flow
(D) An unsteady non-uniform flow
ANSWERS:
1-(B), 2-(C), 3-(B), 4-(C), 5-(D), 6-(B), 7-(B), 8-(A), 9-(A), 10-(C)