Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. During the opening of a valve in a pipe line, the flow is
a. Steady
b. Unsteady
c. Uniform
d. Laminar
Q. The main property that affects a boundary layer is__________
a. Temperature
b. Pressure
c. Viscosity
d. Surface tension
Q. The layer that is influenced by a planetary boundary is called______
a. Atmospheric boundary layer
b. Lithosphere
c. Troposphere
d. Hydrosphere
Q. What is the other name for Stoke’s boundary layer?
a. Momentum boundary layer
b. Atmospheric boundary layer
c. Oscillatory boundary layer
d. Thermal boundary layer
Q. The laminar boundary layer is a _________
a. Smooth flow
b. Rough flow
c. Uniform flow
d. Random flow
Q. The turbulent boundary layer is a _________
a. Non-uniform with swirls
b. Uniform
c. Less stable
d. Smooth
Q. How do we measure the flow rate of liquid?
a. Coriolis method
b. Dead weight method
c. Conveyor method
d. Ionization method
Q. How does a turbulent boundary layer produce swirls?
a. Due to random motion
b. Collision of molecules
c. Due to eddies
d. Due to non-uniform cross section
Q. Define Viscosity.
a. Resistance to flow of object
b. Resistance to flow of air
c. Resistance to flow of fluid
d. Resistance to flow of heat
Q. How can we determine whether the flow is laminar or turbulent?
a. Reynold’s number
b. Mach number
c. Froude number
d. Knudsen number
Q. The flow separation occurs when the fluid travels away from the __________
a. Surface
b. Fluid body
c. Adverse pressure gradient
d. Inter-molecular spaces
Q. The swirl caused due to eddies are called as ______
a. Vortices
b. Vertices
c. Volume
d. Velocity
Q. Which among the following is a device that converts a laminar flow into a turbulent flow?
a. Dead Weight Gauge
b. Vacuum Gauge
c. Turbulator
d. Ionization Gauge
Q. With the boundary layer separation, displacement thickness________
a. Increases
b. Decreases
c. Remains Same
d. Independent