Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. What is the instrument used for the automatic control scheme during the fluid flow?
a. Rotameters
b. Pulley plates
c. Rotary Piston
d. Pilot Static Tube
Q. What is D’Alembert’s Paradox?
a. Resistance= 0
b. Drag force= 0
c. Temperature = 0
d. Pressure gradient= 0
Q. The steady- state flow must satisfy ___________
a. Kirchhoff’s law
b. Newtons law
c. Rutherford’s experiment
d. Kepler’s law
Q. What is the name of the equation?h = (fvL) / (2Dg)
a. Darcey equation
b. Poiseuille law
c. Reynolds equation
d. Sherwood law
Q. Which one of the following is a major loss?
a. frictional loss
b. shock loss
c. entry loss
d. exit loss View Answer
Q. Which property of the fluid accounts for the major losses in pipes?
a. density
b. specific gravity
c. viscosity
d. compressibility View Answer
Q. The frictional resistance for fluids in motion is
a. proportional to the velocity in laminar flow and to the square of the velocity in turbulent flow
b. proportional to the square of the velocity in laminar flow and to the velocity in turbulent flow
c. proportional to the velocity in both laminar flow and turbulent flow
d. proportional to the square of the velocity in both laminar flow and turbulent flow
Q. The frictional resistance for fluids in motion is
a. dependent on the pressure for both laminar and turbulent flows
b. independent of the pressure for both laminar and turbulent flows
c. dependent on the pressure for laminar flow and independent of the pressure for turbulent flow
d. independent of the pressure for laminar flow and dependent on the pressure for turbulent flow View Answer
Q. The frictional resistance for fluids in motion is
a. inversely proportional to the square of the surface area of contact
b. inversely proportional to the surface area of contact
c. proportional to the square of the surface area of contact
d. proportional to the surface area of contact
Q. The frictional resistance for fluids in motion varies
a. slightly with temperature for both laminar and turbulent flows
b. considerably with temperature for both laminar and turbulent flows
c. slightly with temperature for laminar flow and considerably with temperature for turbulent flow
d. considerably with temperature for laminar flow and slightly with temperature for turbulent flow View Answer
Q. Which one of the follflowing is correct?
a. the frictional resistance depends on the nature of the surface area of contact
b. the frictional resistance is independent of the nature of the surface area of contact
c. the frictional resistance depends on the nature of the surface area of contact for laminar flows but is independent of the nature of the surface area of contact for turbulent flows
d. the frictional resistance is independent of the nature of the surface area of contact for laminar flows but depends on the nature of the surface area of contact for turbulent flows View Answer
Q. Which one of the follflowing is correct?
a. the frictional resistance is always dependent on the nature of the surface area of contact
b. the frictional resistance is always independent of the nature of the surface area of contact
c. the frictional resistance is dependent on the nature of the surface area of contact when the liquid flows at a velocity less than the critical velocity
d. the frictional resistance is independent of the nature of the surface area of contact when the liquid flows at a velocity less than the critical velocity View Answer
Q. Which one of the follflowing is correct?
a. Darcy-Weisbach’s formula is generally used for head loss in flow through both pipes and open channels
b. Chezy’s formula is generally used for head loss in flow through both pipes and open channels
c. Darcy-Weisbach’s formula is generally used for head loss in flow through both pipes and Chezy’s formula for open channels
d. Chezy’s formula is generally used for head loss in flow through both pipes and Darcy-Weisbach’s formula for open channels View Answer