Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. Minor losses occur due to
a. sudden enlargement in pipe
b. sudden contraction in pipe
c. bends in pipe
d. all of the above
Q. The friction factor in fluid flowing through pipe depends upon
a. Reynold’s number
b. relative roughness of pipe surface
c. both a. and b.
d. none of the above
Q. What is the effect of change in Reynold’s number on friction factor in turbulent flow?
a. As the Reynold’s number increases the friction factor increases in turbulent flow
b. As the Reynold’s number increases the friction factor decreases in turbulent flow
c. change in Reynold’s number does not affect the friction factor in turbulent flow
d. unpredictable
Q. The component of the total force exerted by fluid on a body in the direction parallel to the direction of motion is called as
a. lift
b. drag
c. both a. and b.
d. none of the above
Q. The sum of components of shear forces in the direction of flow of fluid is called as
a. shear drag
b. friction drag
c. skin drag
d. all of the above
Q. The liquid flowing through a series of pipes can take up__________
a. Pipes of different diameters
b. Pipes of the same diameters only.
c. Single pipe only
d. Short pipes only
Q. What is the total loss developed in a series of pipes?
a. Sum of losses in each pipe only
b. Sum of local losses only
c. Sum of local losses plus the losses in each pipe
d. Zero
Q. The total head loss for the system is equal to_________
a. Pipe length
b. Pipe diameter
c. Width of the reservoir
d. Height difference of reservoirs
Q. Which among the following is not a loss that is developed in the pipe?
a. Entry
b. Exit
c. Connection between two pipes
d. Liquid velocity
Q. If the two reservoirs are kept at the same level, the head loss is _______
a. Z1-Z2
b. Zero
c. T2-T1
d. S2-S1
Q. How do we determine the total discharge through parallel pipes?
a. Add them.
b. Subtract them
c. Multiply them
d. Divide them
Q. The pipe diameter is ________
a. Directly proportional to fluid density
b. Directly proportional to mass flow rate
c. Inversely proportional to mass flow rate
d. Directly proportional to fluid velocity
Q. Which among the following force is developed due to resistance of a fluid flow?
a. Viscous force
b. Inertial force
c. Gravity force
d. Pressure force