Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. The eddy viscosity for turbulent flow is
a. a function of temperature only
b. a physical property of the fluid.
c. dependent on the flow
d. independent of the flow
Q. Flow at constant rate through a tapering pipe isi) steady flow ii) uniform flow iii) unsteady flow iv) non-uniform flow The correct answer is
a. (i) and (ii)
b. (i)and(iv)
c. (ii) and (iii)
d. (ii) and (iv)
Q. Least possible value of correction factor fori) kinetic energy is zero ii) kinetic energy is 1 iii) momentum is zero iv) momentum is 1 The correct statements are
a. (i) and (iii)
b. (ii) and (iii)
c. (i) and (iv)
d. (ii) and (iv)
Q. The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)
a. steady flow
b. uniform flow
c. incompressible flow
d. frictionless flow
Q. Which of the following velocity potentials satisfies continuity equation ?
a. x2y
b. x2-y2
c. cosx
d. x2 + y2
Q. The motion of air mass in a tornado is a
a. free vortex motion
b. forced vortex motion
c. free vortex at center and forced vortex outside
d. forced vortex at center and free vortex outside
Q. In a forced vortex motion, the velocity of flow is
a. directly proportional to its radial distance from axis of rotation
b. inversely proportional to its radial distance from the axis of rotation
c. inversely proportional to the square of its radial distance from the axis of rotation
d. directly proportional to the square of its radial distance from the axis of rotation
Q. Stream lines and path lines always coincide in case of
a. steady flow
b. laminar flow
c. uniform flow
d. turbulent flow
Q. Equation of continuity is based on the principle of conservation of
a. mass
b. energy
c. momentum
d. none of the above
Q. In steady flow of a fluid, the total accele ration of any fluid particle
a. can be zero
b. is never zero
c. is always zero
d. is independent of coordinates
Q. The pitot tube is used to measure
a. velocity at stagnation point
b. stagnation pressure
c. static pressure
d. dynamic pressure