Fluid Mechanics MCQs

1. What is the viscosity of a fluid?
(A) Density
(B) Resistance to deformation
(C) Surface tension
(D) Fluidity

2. Which law states that the pressure in a fluid decreases with an increase in velocity according to Bernoulli’s equation?
(A) Law of Continuity
(B) Pascal’s Law
(C) Archimedes’ Principle
(D) Bernoulli’s Principle

3. What is the SI unit of viscosity?
(A) Pascal-second (Pa·s)
(B) Newton (N)
(C) Joule (J)
(D) Watt (W)

4. Which term describes the force per unit area exerted by a fluid at a point within the fluid?
(A) Pressure
(B) Density
(C) Viscosity
(D) Surface tension

5. In fluid mechanics, what does ‘steady flow’ mean?
(A) Flow with constant velocity
(B) Flow with changing velocity
(C) Turbulent flow
(D) Laminar flow

6. What is the relationship between the pressure and velocity of a fluid according to Bernoulli’s equation?
(A) Inverse
(B) Direct
(C) No relationship
(D) Complex

7. Which law of fluid mechanics states that the flow rate of fluid through a pipe is constant if the pipe diameter remains constant?
(A) Pascal’s Law
(B) Bernoulli’s Law
(C) Law of Continuity
(D) Archimedes’ Principle

8. What does the term ‘viscous flow’ describe in fluid mechanics?
(A) Flow with low viscosity
(B) Flow with high density
(C) Flow with high resistance to deformation
(D) Flow with constant viscosity

9. Which property of a fluid affects its ability to flow smoothly without turbulence?
(A) Viscosity
(B) Density
(C) Surface tension
(D) Temperature

10. What is the SI unit of fluid density?
(A) Pascal (Pa)
(B) Kilogram per cubic meter (kg/m³)
(C) Newton (N)
(D) Joule (J)