# Fluid Mechanics Questions and Answers – Fluid Flow Methods and Types

This set of Basic Fluid Mechanics Questions and Answers focuses on “Fluid Flow Methods and Types”.

1. In which method of fluid flow analysis do we describe the motion parameters at a point?
a) Langragian method
b) Eulerian Method
c) Control volume analysis
d) None of the mentioned

Explanation: In Eulerian method,we describe velocity, acceleration pressure etc at a point in flow field.

2. Which method is most commonly used in fluid mechanics for analysis?
a) Langragian method
b) Eulerian Method
c) Control volume analysis
d) None of the mentioned

Explanation: In Eulerian method,we describe velocity, acceleration pressure etc at a point in flow field.hence, it is also most commonly used in fluid mechanics.

3.In unsteady flow, the flow parameters change with respect to position.
a) True
b) False

Explanation: In unsteady flow, the flow parameters change with respect to time.

4. Uniform flow is defined as the type of flow in which acceleration is zero i.e velocity is constant.
a) True
b) False

Explanation: Uniform flow is defined as the type of flow in which the velocity does not change with respect to space. It can change with respect to time.

5. In laminar flow fluid particles flow along a streamline.
a) True
b) False

Explanation: As per the definition of laminar flow, fluid particles flow in a streamlined manner.
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6. Eddies formed in the turbulent flow are major cause of the energy loss in the turbulent flow.
a) True
b) False

Explanation: Due to zig zag motion of particles eddies are formed and they lead to energy losses.

7. For compressible flow specific gravity remains same.
a) True
b) False

Explanation: For compressible flow, density changes and therefore specific gravity changes.

8. When the flow particles flow in zigzag manner and rotate about their own axis it is what type of flow?
a) Turbulent flow
b) Irrotational flow
c) Rotational flow
d) None of the mentioned

Explanation: It is random manner of fluid flow.

9. If the velocity is function of two space coordinates along with time then fluid flow is three dimensional in nature.
a) True
b) False

Explanation: If the velocity is function of three space coordinates along with time then fluid flow is three dimensional in nature.

10. What is unit for flow rate for gases?
a) m3/s
b) litres/s
c) cm3/s
d) kgf/s

Explanation: Unit for flow rate for gases is Newtons/s or kgf/s.

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