Compressible Flow Quiz With Answer

AdminMay 27, 2024

0 5 1 minute read

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

Compressible Flow Online Flashcards and Quiz

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

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Compressible Flow Quiz

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1 / 40

The isentropic relation for compressible flow relates ____________.

c. Pressure and density

b. Density and temperature

a. Pressure and temperature

2 / 40

Which gas law is used for compressible flow analysis?

c. Ideal gas law

b. Charles's law

a. Boyle's law

3 / 40

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

b. Volume remains constant

a. Density remains constant

c. Compressibility effects are significant

4 / 40

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

a. Less than 1

c. Greater than 1

b. Exactly 1

5 / 40

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

b. Drag reaches its maximum

c. Drag becomes zero

a. Drag starts to decrease

6 / 40

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

b. Supersonic

c. Transonic

a. Subsonic

7 / 40

The Mach number for incompressible flow is __________.

b. Equal to 1

c. Greater than 1

a. Less than 1

8 / 40

The presence of shocks in supersonic flow leads to ____________.

c. Irreversible flow phenomena

a. Decrease in temperature

b. Increase in pressure

9 / 40

The normal Mach number is ____________ to the flow direction.

a. Parallel

b. Perpendicular

c. Tangential

10 / 40

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

a. Accelerates

c. Remains constant

b. Decelerates

11 / 40

A shock wave is a ____________.

b. Rarefaction wave

c. Shear wave

a. Compression wave

12 / 40

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

a. Velocity to speed of light

c. Velocity to viscosity

b. Velocity to speed of sound

13 / 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

14 / 40

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

c. Transonic

a. Supersonic

b. Subsonic

15 / 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

16 / 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

17 / 40

The velocity of sound in a medium depends on ____________.

a. Temperature

c. Both temperature and pressure

b. Density

18 / 40

The Mach number for hypersonic flow is typically ____________.

a. Less than 1

b. Between 1 and 5

c. Greater than 5

19 / 40

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

c. 2

a. 1

b. 0.5

20 / 40

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

a. Divergence angle

b. Convergence angle

c. Throat area

21 / 40

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

b. Subsonic

c. Transonic

a. Supersonic

22 / 40

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

c. Both pressure and temperature

b. Density only

a. Pressure only

23 / 40

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

a. Sonic

b. Subsonic

c. Supersonic

24 / 40

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

c. Less than

b. Equal to

a. Greater than

25 / 40

The presence of shock waves in a flow indicates ____________.

b. Subsonic flow

c. Compressible flow

a. Smooth flow

26 / 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

27 / 40

Shock waves occur in ____________ flow.

c. Transonic

a. Supersonic

b. Subsonic

28 / 40

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

c. Shock

b. Expansion

a. Compression

29 / 40

Shock waves in supersonic flow result in a ____________.

c. Irreversible change

a. Decrease in entropy

b. Increase in density

30 / 40

A shock wave creates a sudden ____________ in pressure.

c. Stability

b. Decrease

a. Increase

31 / 40

In supersonic flow, the Mach cone angle is ____________.

b. Greater than 90°

a. Less than 90°

c. Exactly 90°

32 / 40

The Mach cone is a conical shape formed by ____________.

c. Local velocity vectors

a. Isentropic expansion

b. Isentropic compression

33 / 40

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

c. Speed of a fluid particle

b. Speed of sound

a. Speed of light

34 / 40

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

b. Velocity

a. Density

c. Mach number

35 / 40

The Prandtl-Meyer function describes the relationship between ____________.

a. Pressure and velocity

b. Temperature and pressure

c. Mach angle and Mach number

36 / 40

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

a. 1

b. 0.5

c. 2

37 / 40

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

a. Temperature only

b. Pressure only

c. Both temperature and pressure

38 / 40

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

c. 1.4

a. 0.71

b. 1

39 / 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

40 / 40

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

a. Less than 1

b. Equal to 1

c. Greater than 1

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Compressible Flow Flashcards

Shock waves in supersonic flow result in a ____________.

a. Decrease in entropy

The velocity of sound in a medium depends on ____________.

a. Temperature

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

a. Pressure only

The Mach cone is a conical shape formed by ____________.

a. Isentropic expansion

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

a. Density

The Prandtl-Meyer function describes the relationship between ____________.

a. Pressure and velocity

The presence of shock waves in a flow indicates ____________.

a. Smooth flow

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

a. Less than 1

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

a. Speed of light

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

a. Less than 1

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

a. Accelerates

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

a. Temperature only

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

a. Density remains constant

The presence of shocks in supersonic flow leads to ____________.

a. Decrease in temperature

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

a. Drag starts to decrease

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

a. Compression

The Mach number for hypersonic flow is typically ____________.

a. Less than 1

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

a. Greater than

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

a. Velocity to speed of light

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

a. Divergence angle

The isentropic relation for compressible flow relates ____________.

a. Pressure and temperature

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

a. 0.71

Which gas law is used for compressible flow analysis?

a. Boyle's law

The normal Mach number is ____________ to the flow direction.

a. Parallel

A shock wave creates a sudden ____________ in pressure.

a. Increase

A shock wave is a ____________.

a. Compression wave

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

a. Supersonic

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

a. 1

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

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

a. Bernoulli's equation

The Mach number for incompressible flow is __________.

a. Less than 1

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

a. Mach number

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

a. Equal to the bulk Mach number

Shock waves occur in ____________ flow.

a. Supersonic

In supersonic flow, the Mach cone angle is ____________.

a. Less than 90°

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

a. Half the speed of sound

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

a. Subsonic

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

a. Sonic

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

a. Supersonic

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

a. 1

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AdminMay 27, 2024

0 5 1 minute read