Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. Which among the following force is developed due to resistance in its state of motion?
a. Viscous force
b. Inertial force
c. Gravity force
d. Pressure force
Q. Which among the following is the correct formula for gravitational force?
a. F= Gm1m2/r2
b. F= Gm1m2
c. F= m1m2/r2
d. F= Gm1m2/r3
Q. Which among the following is present in pipe flow?
a. Viscous force
b. Inertial force
c. Gravity force
d. Pressure force
Q. A force that is caused due to attraction of particles in the layer of fluid bulk is called?
a. Viscous force
b. Inertial force
c. Surface tension force
d. Pressure force
Q. A force that is needed to bring back the body to its original position is called as?
a. Viscous force
b. Elastic force
c. Gravity force
d. Pressure force
Q. The drag force acts in _____ to the flow velocity.
a. Perpendicular direction
b. Same direction
c. Opposite direction
d. Different directions
Q. Drag force is affected by__________
a. Cross sectional area and smoothness
b. Rigidity and density
c. Pressure and temperature
d. Mass
Q. The lift force acts in _____ to the flow velocity.
a. Perpendicular direction
b. Same direction
c. Opposite direction
d. Different directions
Q. Which among the following is the correct formula for drag?
a. D = Cd * A * 0.5 * r * V2
b. D = Cd * A * 0.5 * r * V*2
c. D = Cd * A * 0.5 * r * V/2
d. D = 0.5 * r * V
Q. Which among the following is the correct formula for lift?
a. D = Cl * A * 0.5 * r * V2
b. D = Cl * A * 0.5 * r * V*2
c. D = Cl * A * 0.5 * r * V/2
d. D = 0.5 * r * V
Q. The main property that affects a boundary layer is__________
a. Temperature
b. Pressure
c. Viscosity
d. Surface tension
Q. The turbulent boundary layer is a _________
a. Non-uniform with swirls
b. Uniform
c. Less stable
d. Smooth
Q. When the Mach number is less than unity, the flow is called
a. Sub-sonic flow
b. Sonic flow
c. Super-sonic flow
d. Hyper-sonic flow
Q. The product of mass and acceleration of flowing liquid is called
a. Inertia force
b. Viscous force
c. Gravity force
d. Pressure force
Q. Ratio of inertia force to elastic force is known as
a. Mach number
b. Froude number
c. Reynolds number
d. Weber's number