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# Viscous Flow MCQ Questions - Fluid Mechanics

Viscous Flow MCQs : Here you will find MCQ Questions related to "Viscous Flow" in Fluid Mechanics. These Viscous Flow MCQ Questions Will help you to improve your Fluid Mechanics knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.

Question 1

Which of the following flows have the highest critical Reynolds number (lower)?

A. Flow in a pipe
B. Flow between parallel plates
C. Flow in an open channel
D. Flow around spherical body

Question 2

How is Reynolds number defined as?

A. Ratio of pressures in the inlet to the outlet of a pipe
B. The product of velocity of the flow and the diameter of the pipe, divided by the kinematic viscosity of fluid
C. The product of density of the fluid, velocity of the flow and the diameter of the pipe, divided by the dynamic viscosity of fluid
D. Ratio of inertia force to viscous force

Question 3

Which of the factors primarily decide whether the flow in a circular pipe is laminar or turbulent?

A. The Prandtl Number
B. The Pressure gradient along the length of the pipe
C. The dynamic viscosity coefficient
D. The Reynolds Number

Question 4

For a fully-developed pipe flow, how does the pressure vary with the length of the pipe?

A. Linearly
B. Parabolic
C. Exponential
D. Constant

Question 5

During which case will the power loss be maximum?

A. High viscosity oil
B. Low viscosity oil
C. High viscosity water
D. Low viscosity water

Question 6

Fluid does not offer resistance to change of__________

A. Temperature
B. Volume
C. Pressure
D. Shape

Question 7

Why can’t mercury wet a glass?

A. Cohesion
C. Surface tension
D. Compressibility

Question 8

Which among the following does not depend on the friction factor?

A. Pipe diameter
B. Fluid density
C. Viscosity
D. Weight

Question 9

How do we calculate losses for a larger range of Reynolds number?

A. Moody chart
B. Bar Chart
C. Scatter chart
D. Column histogram