# Equations of Fluid Motion

This quiz contains multiple-choice problems on Euler’s and Bernoulli’s equations of motion, Bernoulli applications, Newton’s first and second laws of motion, Navier-Stokes equation, impulse and moment of momentum equations.

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Which of the following is NOT a type of force considered in the Navier-Stokes equation?

Gravity force

Pressure force

Surface tension force

Viscous force

Which of the following equations is a result of momentum conservation for inviscid steady flows?

Bernoulli’s equation

Navier-Stokes equation

First law of thermodynamics

Euler’s equation

The Bernoulli’s equation in fluid dynamics is valid for

Compressible flows

Transient flows

Continuous flows

Viscous flows

Water flows through a pipe at a velocity of 2 m/s. The pressure gauge reading is 2 bar. The datum head is given to be 2 m. Find the piezometric head. (assume all Bernoulli’s assumptions, density of water = 1000 kg/m^3, g = 9.8 m/s^2).

22.4 m

22.6 m

20.4 m

20.6 m

A student wishes to find the velocity of air flowing through a pipe. He has a pressure gauge that displays only the dynamic pressure, and the pressure gauge reads 0.018 mm Hg. Assuming the density of air to be 1.225 kg/m^3, find the velocity V of air (ρ{Hg} = 13600 kg/m^3).

4 m/s

2 m/s

20 m/s

40 m/s

If compressibility force and surface tension force are neglected from the Newton’s second law of motion, which of the following equations result?

Navier-Stokes equation

Euler’s equation

Bernoulli’s equation

Reynolds equation

What does a pitot tube measure? What is its working principle?

Pressure; Bernoulli’s principle

Velocity; Bernoulli’s principle

Pressure; Euler’s equation

Velocity; Euler’s equation

The best place to place a pitot tube on an aircraft for velocity measurement is behind the jet engine. True or false?

True

False

A point in a fluid flow where the flow has come to rest is called

Pressure point

Initial point

Flow point

Stagnation point

When a fluid is subjected to resistance, it undergoes a volumetric change due to

Strain

Cohesion

Compressibility

What is the formula to find the kinematic viscosity of a fluid?

(Dynamic viscosity) * Temperature

(Dynamic viscosity)/Density

1/(Dynamic viscosity)

Density/(Dynamic viscosity)

A one-dimensional flow is also called

A flow which involves zero transverse component

Uniform flow

Zig-zag flow

What is the resultant upward pressure of a fluid on an immersed body called?

Buoyancy

Metacentre

Upthrust

Reaction pressure

Which of the following quantities represents a liquid of mass 1000kg occupying a volume of one cubic meter?

Specific density

Specific weight

Specific gravity

Specific mass

When is a fluid said to be ideal?

Non-viscous and incompressible

Viscous and compressible

Viscous and Incompressible

Incompressible

Quiz/Test Summary
Title: Equations of Fluid Motion
Questions: 15
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