Compressible Flow MCQs with Answers

adminMarch 28, 2024

0 7 1 minute read

Welcome to the Compressible Flow MCQs with Answers. In this post, we have shared Compressible Flow Online Test for different competitive exams. Find practice Compressible Flow Practice Questions with answers in Physics Tests exams here. Each question offers a chance to enhance your knowledge regarding Compressible Flow.

Compressible Flow Online Quiz

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Test Name: Compressible Flow MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

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Compressible Flow

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1 / 40

The velocity of a flow is 500 m/s and the speed of sound is 300 m/s. What is the Mach number?

a. 1.67

c. 1.5

b. 0.6

2 / 40

The ratio of the local velocity to the local speed of sound is known as the ___________.

b. Reynolds number

c. Froude number

a. Mach number

3 / 40

A shock wave is a ____________.

b. Rarefaction wave

c. Shear wave

a. Compression wave

4 / 40

The Mach angle is the angle at which a ________ wave is inclined to the direction of motion.

a. Compression

c. Shock

b. Expansion

5 / 40

A shock wave creates a sudden ____________ in pressure.

c. Stability

b. Decrease

a. Increase

6 / 40

The flow will reach choked conditions when the Mach number is ____________.

b. Equal to 1

c. Greater than 1

a. Less than 1

7 / 40

The critical Mach number is the Mach number at which the flow becomes _________.

a. Sonic

b. Subsonic

c. Supersonic

8 / 40

What type of flow occurs when the Mach number is less than 1?

b. Supersonic

c. Transonic

a. Subsonic

9 / 40

Shock waves in supersonic flow result in a ____________.

a. Decrease in entropy

b. Increase in density

c. Irreversible change

10 / 40

_________ flow occurs when the Mach number is greater than 1.

c. Transonic

a. Supersonic

b. Subsonic

11 / 40

The flow will choke when the Mach number at the throat reaches ___________.

a. 1

c. 2

b. 0.5

12 / 40

In compressible flow, which property remains constant along a streamline?

b. Velocity

a. Density

c. Mach number

13 / 40

Shock waves occur in ____________ flow.

b. Subsonic

c. Transonic

a. Supersonic

14 / 40

The presence of shocks in supersonic flow leads to ____________.

b. Increase in pressure

c. Irreversible flow phenomena

a. Decrease in temperature

15 / 40

The isentropic relation for compressible flow relates ____________.

c. Pressure and density

b. Density and temperature

a. Pressure and temperature

16 / 40

The critical Mach number for an airfoil is typically where ____________.

b. Drag reaches its maximum

a. Drag starts to decrease

c. Drag becomes zero

17 / 40

The Mach number for incompressible flow is __________.

b. Equal to 1

c. Greater than 1

a. Less than 1

18 / 40

The local Mach number at a point in a flowing fluid is dependent on ____________.

c. Both pressure and temperature

a. Pressure only

b. Density only

19 / 40

The maximum Mach number that can be reached in a convergent-divergent nozzle is limited by the ____________.

c. Throat area

b. Convergence angle

a. Divergence angle

20 / 40

The Mach cone is a conical shape formed by ____________.

b. Isentropic compression

c. Local velocity vectors

a. Isentropic expansion

21 / 40

The local Mach number in a convergent-divergent nozzle increases as the flow ____________.

c. Remains constant

a. Accelerates

b. Decelerates

22 / 40

The Mach number is a dimensionless quantity representing the ratio of ____________.

a. Velocity to speed of light

b. Velocity to speed of sound

c. Velocity to viscosity

23 / 40

The velocity of sound in a medium depends on ____________.

c. Both temperature and pressure

a. Temperature

b. Density

24 / 40

What is the Mach number at which flow transitions from subsonic to supersonic?

b. 0.5

a. 1

c. 2

25 / 40

The velocity of a flow is supersonic when its Mach number is _____________.

b. Exactly 1

c. Greater than 1

a. Less than 1

26 / 40

The presence of shock waves in a flow indicates ____________.

a. Smooth flow

b. Subsonic flow

c. Compressible flow

27 / 40

The term "compressible flow" refers to flow in which ____________.

c. Compressibility effects are significant

a. Density remains constant

b. Volume remains constant

28 / 40

The Prandtl-Meyer function describes the relationship between ____________.

b. Temperature and pressure

c. Mach angle and Mach number

a. Pressure and velocity

29 / 40

Which gas law is used for compressible flow analysis?

b. Charles's law

c. Ideal gas law

a. Boyle's law

30 / 40

A convergent-divergent nozzle is typically used for ____________ flow.

a. Supersonic

c. Transonic

b. Subsonic

31 / 40

In supersonic flow, the Mach cone angle is ____________.

b. Greater than 90°

a. Less than 90°

c. Exactly 90°

32 / 40

The normal Mach number is ____________ to the flow direction.

a. Parallel

b. Perpendicular

c. Tangential

33 / 40

The ratio of specific heats (γ) for air is approximately ____________.

c. 1.4

b. 1

a. 0.71

34 / 40

The Mach number for hypersonic flow is typically ____________.

a. Less than 1

c. Greater than 5

b. Between 1 and 5

35 / 40

The speed of sound in a gas is dependent on ____________.

c. Both temperature and pressure

b. Pressure only

a. Temperature only

36 / 40

What is the speed of sound in a medium with a Mach number of 0.5?

a. Half the speed of sound

b. Equal to the speed of sound

c. Twice the speed of sound

37 / 40

The local Mach number at a point in a flowing fluid is ____________.

a. Equal to the bulk Mach number

b. Always greater than 1

c. Dependent on pressure only

38 / 40

The Mach number of a flow is defined as the ratio of the flow velocity to the ____________.

a. Speed of light

c. Speed of a fluid particle

b. Speed of sound

39 / 40

In subsonic flow, the velocity of the fluid is ____________ the speed of sound.

a. Greater than

b. Equal to

c. Less than

40 / 40

For compressible flow, which equation governs the relationship between Mach number and velocity?

c. Mach's equation

a. Bernoulli's equation

b. Euler's equation

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adminMarch 28, 2024

0 7 1 minute read