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Nozzles Steam Flow MCQ Questions & Answers

Nozzles Steam Flow MCQs : This section focuses on the "Nozzles Steam Flow". These Multiple Choice Questions (MCQs) should be practiced to improve the Nozzles Steam Flow skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

A steam nozzle is a passage of varying cross section through which the kinetic energy of steam is converted into heat energy.

A. TRUE
B. FALSE

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Question 2

Calculate the throat pressure if the dry and saturated steam enters a nozzle at 15 bar. Consider the discharge through the nozzle maximum.

A. 8.66 bar
B. 7.58 bar
C. 5.65 bar
D. 2.36 bar

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Question 3

Determine the velocity of steam at throat if the discharge through the nozzle is maximum. Steam enters the nozzle in dry and saturated state and at 11 bar.

A. 455.45 m/s
B. 625.32 m/s
C. 545.87 m/s
D. 325.65 m/s

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Question 4

Dry and saturated steam enters a nozzle at 11 bar and leaves at 2 bar. What minimum exit area should the nozzle have if the steam flow of 2 kg/s is to be maintained?

A. 0.00365 m2
B. 0.02156 m2
C. 0.00312 m2
D. 0.00228 m2

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Question 5

Dry saturated steam enters a steam nozzle at 12 bar and 200°C and leaves at 2 bar. If the exit area is 0.00197 m2, determine the mass flow rate of steam.

A. 1 kg/s
B. 2 kg/s
C. 3 kg/s
D. 4 kg/s

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Question 6

Final velocity of steam passing thorough a nozzle is found out to be 586 m/s. The pressure of steam at inlet is 15 bar and is dry and saturated. The exit pressure is 2 bar. Determine the dryness fraction of the steam when it leaves the nozzle.

A. 0.79
B. 0.96
C. 0.88
D. 0.81

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Question 7

Steam at a temperature 200°C and pressure 4 bar enters a steam nozzles and is discharged at 1 bar pressure. Determine the exit velocity of steam if the inlet velocity is negligible.

A. 500 m/s
B. 720 m/s
C. 580 m/s
D. 750 m/s

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Question 8

Steam entering a nozzle at 15 bar and 350°C is discharged at 1 bar. If the inlet velocity of the steam is 50 m/s, determine the exit velocity.

A. 785 m/s
B. 365 m/s
C. 565 m/s
D. 475 m/s

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Question 9

Steam enters a nozzle at 14 bar and 200°C. Determine the discharge if the discharge through the nozzle is maximum. Take the area of throat as 0.002 m2.

A. 3.95 kg/s
B. 4.18 kg/s
C. 2.36 kg/s
D. 1.65 kg/s

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Question 10

The maximum mass flow through a steam nozzle is independent of _____

A. Initial pressure
B. Initial density
C. Final pressure
D. Throat area

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Question 11

The smallest section of a steam nozzle is called _____

A. maw
B. neck
C. throat
D. muzzle

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Question 12

The steam flow though nozzle is considered to be _____

A. adiabatic
B. isobaric
C. isothermal
D. isochoric

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Question 13

Which of the following statements about steam nozzles is FALSE?

A. It converts the heat energy of the steam into kinetic energy
B. It has a varying cross section
C. The smallest section is called throat
D. The pressure at the outlet is more than at the inlet

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