What is the effect of friction on flow of steam through a nozzle ?

1 Answer

Answer :

To decrease both mass flow rate and wetness of steam.

Related questions

Description : The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam. (A) Wetness (B) Mass flow rate (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'

Last Answer : (C) Both 'a' & 'b'

Description : In case of a pipe exit fitted with a nozzle, the (A) Conversion of kinetic head to pressure head is facilitated (B) Conversion of pressure head to kinetic head is facilitated (C) Power transmitted through the nozzle ... in the pipe is equal to one third of the total supply head (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Description : The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head. (A) One-half (B) One-third (C) Two-third (D) None of these

Last Answer : Answer: Option B

Description : An ideal nozzle design aims at (A) Minimising wall friction (B) Suppressing boundary layer separation (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Description : Hallow cone nozzle – liquid is fed into whirl chamber through entry or through a fixed spiral passage to give rotation motion. a. Axial b. Radial c. tangential. d. None of above

Last Answer : Ans- c. tangential.

Description : The principle of conservation of energy cannot be applied in case of a.Flow of heat through a metal b.Ideal flow of water in a pipe c.Simple pendulum d.Sliding of a particle along inclined plane with friction e.A particle moving in gravitational field

Last Answer : e. A particle moving in gravitational field

Description : What is preferred location for steam out nozzle on drum?

Last Answer : Answer: At the end opposite to the maintenance access.

Description : Explain the functions of steam nozzle.

Last Answer : The steam nozzle is a passage of varying cross section by means of which the thermal energy of steam is converted into kinetic energy. When steam f lows through a nozzles expansion process take place.

Description : Dry saturated steam can be converted into superheated steam by (A) Increasing its cross-sectional area of flow (B) Passing it through a pressure reducing valve (C) Forcing it downwards through a vertical tube (D) None of these

Last Answer : (B) Passing it through a pressure reducing valve

Description : Sele(A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meterct the correct statement. (B) A Venturimeter with a given gage difference discharges at a ... a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

Last Answer : (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meterct the correct statement

Description : Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter (B) A Venturimeter with a given gage difference discharges at a ... a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

Last Answer : (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter

Description : The energy loss in flow through Venturimeter is less than that through flow nozzle, because in case of a flow nozzle, the (A) Length is shorter (B) Throat diameter is more (C) Sudden expansion of flow in the downstream occurs (D) Distance between the throat and the inlet is more

Last Answer : (C) Sudden expansion of flow in the downstream occurs

Description : Under what condition a convergent divergent nozzle required ?

Last Answer : When pressure ratio is greater than critical pressure ratio.

Description : Under what circumstances would there be an increase in pressure in a diver¬gent nozzle ?

Last Answer : For subsonic flow at inlet section of a diffuser a lower velocity and higher pressure will exist at the exit section. For supersonic isentropic flow at the inlet section a higher velocity and lower pressure ... if a shock wave occurs in the diffuser then a higher pressure will exist at the exit.

Description : When maximum discharge is obtained in nozzle ?

Last Answer : At the critical pressure ratio.

Description : Name of instrument used for testing of spray nozzle a) Patternator b) Aerometer c) Galvanometer d) Piezometer Ans. a

Last Answer : ans a

Description : In a sprayer overlapping can be increased by increasing a) Nozzle diameter b) Pressure c) Discharge d) Height of nozzle Ans. d

Last Answer : ans d

Description : A flat fan nozzle is suitable for a) Foliage spray b) Insect control c) Spot spray d) Herbicide spray

Last Answer : ans d

Description : Fan nozzle mostly used for pressure spraying. b. high c. moderate d. None of above

Last Answer : Ans- b. low

Description : . Fan nozzle forms narrow. spray pattern. a. large c. Straight. d. None of above

Last Answer : Ans- b. elliptical.

Description : It is the part of cone nozzle which imparts rotation to the liquid. b. Cone plate c. Round plate d. None of above

Last Answer : Ans- a. Swirl plate

Description : The conventional type of Mower consists of which of the following a) Wearing Plate b) Nozzle c) Air Chamber d) None of the above

Last Answer : Wearing Plate

Description : nozzle which forms narrow elliptical spray pattern. a) Hollow cone nozzle b) Hard cone nozzle c) Solid cone nozzle d) Fan nozzle

Last Answer : Fan nozzle

Description : Basic components of sprayer is a) Nozzle body b) Spray boom c) Nozzle cap d) All of the above

Last Answer : All of the above

Description : Nozzle diameter of hand atomizer is between ………… to ………… a. 0.7 – 1.5. c. 1.1- 1.5 b. 0.6 – 1.6. d 0.8 to 1.8

Last Answer :  0.6 – 1.6.

Description : Component to remove suspended matter large than a predetermined size from fluid. a. Relief valve. c. Filter b. Spray gun. d. Nozzle

Last Answer : Filter

Description : Nozzle consists of components a) Washer b) Vortex plate c) Strainer d) All of the above

Last Answer : All of the above

Description : is the minimum pressure required for operating a nozzle in desirable condition a) 1 kg/cm b) 1.5kg/cm c) 2 kg/cm d) 2.5kg/cm

Last Answer : 1.5kg/cm

Description : is the types of nozzle used in sprayers a) Hollow cone type of nozzle b) Solid cone type nozzle c) Fan type nozzle d) All of the above

Last Answer : All of the above

Description : Basic components of sprayer. a. Nozzle body b. Nozzle boss c. Filter d. Spray gun e. All of the above

Last Answer : All of the above

Description : Junior hoe consist of and attached to the framework with hinge arrangement a) Reversible showers, nozzle body b) Reversible shovels, curved tynes c) Reversible shovels, curved tyres d) Pressure regulator, spray lance

Last Answer : Reversible shovels, curved tynes

Description : In the natural draft cooling tower_________ is not required a) Fan b) tower c) Nozzle d) none of the above

Last Answer : Fan

Description : Open system usually encloses which of the following devices?  A. Compressor  B. Turbine  C. Nozzle  D. All of the above

Last Answer : All of the above

Description : With diminishing cross-sectional area in case of subsonic flow in a converging nozzle, the (A) Velocity increases (B) Pressure decreases (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Description : . It is possible to integrate an automatic flow controller to a (A) Flow nozzle (B) Venturimeter (C) Rotameter (D) None of these

Last Answer : (C) Rotameter

Description : The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a (A) Weir (B) Pitot tube (C) Kennison nozzle (D) V-notch

Last Answer : (B) Pitot tube

Description : Out of the following flow measuring devices, which one incurs themaximum installation cost as well as pressure loss? (A) Flow nozzle (B) Venturimeter (C) Rotameter (D) Orificemeter

Last Answer : (B) Venturimeter

Description : For the same flow rate of a fluid, the pressure drop is the least for (A) Venturimeter (B) Orificemeter (C) Flow-nozzle (D) Δp is same for all

Last Answer : (A) Venturimeter

Description : Which of the following exemplifies a three dimensional fluid flow? (A) Fluid flow at the inlet to a nozzle (B) Fluid flow between parallel plates (C) Viscous fluid flow between converging plates (D) None of these

Last Answer : (A) Fluid flow at the inlet to a nozzle

Description : For a given fluid flow rate, which of the following incurs maximum head loss? (A) Orificemeter (B) Venturimeter (C) Flow nozzle (D) All of them incur the same head loss

Last Answer : (A) Orificemeter

Description : Which is the most efficient and best for measuring very small flow rate of gases? (A) Venturimeter (B) Orificemeter (C) Rotameter (D) Flow nozzle

Last Answer : (C) Rotameter

Description : In a/an __________, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure. (A) Rotameter (B) Pitot tube (C) Venturimeter (D) Flow nozzle

Last Answer : (B) Pitot tube

Description : Which of the following instruments is used to measure flow on the application of Bernoulli's theorem? (A) Venturimeter (B) Orifice plate (C) Nozzle (D) All of the above

Last Answer : Answer: Option D

Description : In which type of cooling system are nozzle arranged on different elevation? A Single deck system B Double deck system C Natural flow system D Direct flow system

Last Answer : B Double deck system

Description : Flow rates of particular nozzle is directly proportional to a. square root of pressure b. orifice area c. Both (a) and (B) d. none of the above

Last Answer : c. Both (a) and (B)

Description : Ratio of actual indicated work to hypothetical indicated work in a steam engine is the (a) Indicated thermal efficiency (b) Friction factor (c) Mechanical efficiency (d) Diagram factor

Last Answer : Ans : d

Description : Wet steam at 1 MPa flowing through a pipe is throttled to a pressure of 0.1 MPa. If the throttling temperature is110°C, What is the quality of the steam in the pipe?  a) 96%  b) 86%  c) 76%  d) 66%

Last Answer : 96%

Description : Water contained in a beaker can be made to boil by passing steam through it  (a) at atmospheric pressure  (b) at a pressure below the firuosphejric pressure  (c) at a pressure greater than atmospheric pressure  (d) any pressure  (e) not possible.

Last Answer : Answer : c

Description : swirl plate in the cone nozzle is provided to. a. Impart rotational motion to the liquid passing through it. b. To increase the droplet size. c. To decrease the droplet size. d. To increase the spray angle.

Last Answer : a. Impart rotational motion to the liquid passing through it.

Description : The reactive power drawn by a motor from an AC generator is the power which is _____________. A. used to establish the magnetic field of the motor B. lost in overcoming friction in the ... by current flow through the windings D. transmitted directly through the rotor shaft to perform useful work

Last Answer : Answer: A