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 Mach number for incompressible flow is __________.

b. Equal to 1

c. Greater than 1

a. Less than 1

2 / 40

Shock waves occur in ____________ flow.

b. Subsonic

a. Supersonic

c. Transonic

3 / 40

The normal Mach number is ____________ to the flow direction.

c. Tangential

b. Perpendicular

a. Parallel

4 / 40

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

a. Compression

b. Expansion

c. Shock

5 / 40

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

a. 0.71

c. 1.4

b. 1

6 / 40

Which gas law is used for compressible flow analysis?

a. Boyle's law

c. Ideal gas law

b. Charles's law

7 / 40

In supersonic flow, the Mach cone angle is ____________.

c. Exactly 90°

a. Less than 90°

b. Greater than 90°

8 / 40

The presence of shocks in supersonic flow leads to ____________.

b. Increase in pressure

c. Irreversible flow phenomena

a. Decrease in temperature

9 / 40

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

b. Always greater than 1

a. Equal to the bulk Mach number

c. Dependent on pressure only

10 / 40

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

c. Compressibility effects are significant

b. Volume remains constant

a. Density remains constant

11 / 40

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

b. 0.5

c. 2

a. 1

12 / 40

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

a. Bernoulli's equation

c. Mach's equation

b. Euler's equation

13 / 40

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

c. 1.5

a. 1.67

b. 0.6

14 / 40

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

b. Density only

c. Both pressure and temperature

a. Pressure only

15 / 40

The velocity of sound in a medium depends on ____________.

c. Both temperature and pressure

b. Density

a. Temperature

16 / 40

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

c. Remains constant

a. Accelerates

b. Decelerates

17 / 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

18 / 40

The presence of shock waves in a flow indicates ____________.

a. Smooth flow

b. Subsonic flow

c. Compressible flow

19 / 40

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

a. Mach number

c. Froude number

b. Reynolds number

20 / 40

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

b. Equal to

c. Less than

a. Greater than

21 / 40

The Mach number for hypersonic flow is typically ____________.

b. Between 1 and 5

c. Greater than 5

a. Less than 1

22 / 40

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

b. Convergence angle

a. Divergence angle

c. Throat area

23 / 40

A shock wave is a ____________.

b. Rarefaction wave

c. Shear wave

a. Compression wave

24 / 40

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

b. Subsonic

a. Supersonic

c. Transonic

25 / 40

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

a. Less than 1

c. Greater than 1

b. Equal to 1

26 / 40

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

a. Half the speed of sound

c. Twice the speed of sound

b. Equal to the speed of sound

27 / 40

The isentropic relation for compressible flow relates ____________.

a. Pressure and temperature

b. Density and temperature

c. Pressure and density

28 / 40

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

a. Temperature only

c. Both temperature and pressure

b. Pressure only

29 / 40

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

c. Greater than 1

b. Exactly 1

a. Less than 1

30 / 40

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

a. Subsonic

b. Supersonic

c. Transonic

31 / 40

Shock waves in supersonic flow result in a ____________.

c. Irreversible change

a. Decrease in entropy

b. Increase in density

32 / 40

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

a. Sonic

c. Supersonic

b. Subsonic

33 / 40

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

c. 2

b. 0.5

a. 1

34 / 40

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

a. Drag starts to decrease

c. Drag becomes zero

b. Drag reaches its maximum

35 / 40

The Mach cone is a conical shape formed by ____________.

c. Local velocity vectors

a. Isentropic expansion

b. Isentropic compression

36 / 40

A shock wave creates a sudden ____________ in pressure.

b. Decrease

a. Increase

c. Stability

37 / 40

The Prandtl-Meyer function describes the relationship between ____________.

a. Pressure and velocity

c. Mach angle and Mach number

b. Temperature and pressure

38 / 40

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

b. Subsonic

c. Transonic

a. Supersonic

39 / 40

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

c. Velocity to viscosity

a. Velocity to speed of light

b. Velocity to speed of sound

40 / 40

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

a. Density

b. Velocity

c. Mach number

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adminMarch 28, 2024

0 7 1 minute read