State any two advantages of ultrasonic flow meters.

1 Answer

Answer :

Advantages of ultrasonic level measurement:

1. Offer no obstruction to the flow

2. o/p is insensitive to variation in viscosity, density and temperature

3. No moving parts

4. Linear relationship between o/p and i/p

5. Used for bidirectional flow

6. Excellent dynamic response

7. Good accuracy +-2%

8. o/p is electrical

9. It is used as non-contact method of flow measurement.


Related questions

Description : Related to ultrasonic flow meter: (i) Give any two types of it. (ii) Write any two specifications. (iii) Write two advantages over rotameter. 

Last Answer : (i) Two types of ultrasonic flow meter:  ➢ Transit time flow meters (time differences) ➢ Doppler type. (ii) Write any two specifications: - 1. Accuracy 2. Linearity 3. Repeatability 4. ... for bidirectional flow 8. Excellent dynamic response 9. Good accuracy +-2% 10. o/p is electrical

Description : Compare Nuclear Radiation type and Ultrasonic level measurement.

Last Answer : Sr. No Nuclear Radiation Ultrasonic level  1 Can be installed in highly hazardous areas   Cannot be installed in highly hazardous areas 2 They can measure level in applications ... 7 Measurements can be skewed by density Measurements cannot be skewed by density

Description : List any two advantages and applications of RADAR type level measurement.

Last Answer : ➢ Advantages: - 1. This is non-contact technology, 2. High accuracy for measurements in storage tanks and some process vessels. 3. Used on difficult hard-to-handle' applications 4. High accuracy 5. ... 6. Powders 7. Bulk solids 8. Ice cream "Premix" mixer 9. Storage tanks for toxic liquids

Description : List any two advantages and two applications of Bellows.

Last Answer : Advantages: - 1. It is used to measure absolute & differential pressure. 2. It is used to measure low or medium pressure rang. 3. Bellow joints do not require access; ... . 3. low pressure gauges are suitable for chemical, petrochemical, plant construction, and cleanrooms

Description : Draw optical type pyrometer and list its advantages. 

Last Answer : Diagram of optical pyrometer ➢ Advantages: - 1) Flexibility 2) Portability 3) Monitor the temperature of moving object 4) Simple assembling of the device enables easy use of it. ... without contacting the heated body. 7) Fast response. 8) High output signal and moderate cost. 

Description : Explain with neat labelled diagram measurement of flow using venturi meter

Last Answer : Explanation: It is a primary element of differential pressure Flow meters. 1) It consists of a straight inlet section, a converging conical inlet section, a cylindrical throat and diverging recovery ... abruptly, so permanent pressure loss or energy loss is very low as compared to orifice plate.

Description : Draw and explain Doppler type flow measurement.

Last Answer : Doppler type ultrasonic flow meter ➢ Explianation: The Doppler Effect Ultrasonic Flow meter use reflected ultrasonic waves to measure the fluid velocity. There is a change in ultrasonic ... , there will be a frequency shift at the receiver end which is protentional to the velocity

Description : State the selection criteria for transducers

Last Answer : 1. Operating range 2. Operating principle 3. Sensitivity 4. Accuracy 5. Frequency response and resonant frequency 6. Errors 7. Environmental compatibility 8. Usage and ruggedness. 9. ... . 10. Stability and Reliability 11. Loading effect 12. Static characteristics 13. Noise immunity

Description : State function of strain gauge. Give its types and explain working of any one type of it.

Last Answer : Function of strain gauge: - ➢ The strain gauge is a passive, resistive transducer which converts the mechanical elongation and compression into a resistance change. ➢ This change in ... change in resistivity. 3. Silicon and germanium are used as resistive material for semiconductor gauges

Description : State Seeback effect and Petlier effect.

Last Answer : See back Effect: - When a pair of dissimilar metals are joined at one end (junction, J1) , and there is a temperature difference between the joined ends and the open ends ( junction , ... effect: Heat is given out or absorbed when an electric current pass across a junction between two materials.

Description : State necessity of instrument calibration.

Last Answer : Necessity of instrument calibration: - ➢ To ensure reading from an instrument are consistent with other measurements. ➢ To determine the accuracy of the instrument reading. ➢ To ... Calibration Keeps Processes Safe ➢ Calibration Maintains Certification ➢ Reduce Costs from Manufacturing Errors

Description : What is piezo electric effect? Name two piezo electric materials.

Last Answer : Piezoelectric Effect: - When pressure or force is applied on piezoelectric crystals such as quartz crystal then an electric charge is generated across that crystal. OR Piezoelectric Effect is the ability ... Topaz 5. Tourmaline 6. lead titanate 7. lead zirconate titanate 8. lithium sulphate

Description : List any two non-contact type level measurement methods.

Last Answer : • The following are non-contact type level measurement methods 1. Ultrasonic type level measurement 2. Nuclear radiation type level measurement 3. Radar type level measurement 4. Capacitive level transducer. 5. Load cell type level transducer.

Description : List any two direct methods of level measurement. Explain Hydrostatic method of level measurement. Give one advantage and one disadvantage of it.

Last Answer : ➢ Direct methods of level measurement Direct methods 1. Hook type 2. Sight glass type 3. Float type 4. Dip stick ➢ Hydrostatic method of level measurement. ➢ A liquid in ... - 1. Their calibration gets changed according to variations in product density. 2. Require compressed air.

Description : List any two specifications of electrical pressure transducer.

Last Answer : Specifications of electrical pressure transducer: - 1. Root Sum Squares (RSS) 2. Non-Linearity 3. Hysteresis 4. Non-Repeatability 5. Long-Term Stability 6. Zero Offset 7. Span ... Size 10. associated circuit 11. sensitivity 12. self-generated or external power source 13. Miscellaneous

Description : Give classification of transducer on any two factors

Last Answer : The transducers can be classified as: - 1. Active and passive transducers. 2. Analog and digital transducers. 3. On the basis of transduction principle used. 4. Primary and secondary transducer 5. Transducers and inverse transducers

Description : Compare orifice plate with venturi tube with reference to: (i) Working principle (ii) Construction (iii) Cost (iv) Pressure loss

Last Answer : Venturi Flow Meter vs Orifice Plate Meter

Description : Explain the process of calibration of pressure gauge by Dead Weight Tester.

Last Answer : Deadweight Testers (DWT) are the primary standard for pressure measurement. A dead weight tester is an instrument that calibrates pressure by determining the weight of force divided by the area the force ... at each gauge reading and ensure that it is within the acceptable accuracy limits.

Description : Draw constructional details of C-types Bourdon tube and explain its working

Last Answer : Constructional details of C-types Bourdon tube :   Explanation:- 1. The Bourdon tubes are made out of an elliptically sectioned flat tube bent in such a way as to produce the above ... pressure. 8. The materials used for Bourdon tubes are brass, phosphor bronze, beryllium copper, and steel 

Description : List any four units of pressure.

Last Answer : • The following are units of Pressure 1. Pascals (Pa or N/m2)—N stands for newton which is SI unit of pressure 2. Psi - Pounds per square inch (PSI) 3. Bar – 105 Pascals 4. mm Hg-millimeters of Mercury 1mm of Hg = 1 Torr 5. Torr – 133.32 Pa 6. cm H2O – 1 cmH2O = 98.068 Pa

Description : Define active and passive transducers. 

Last Answer : 1. Active Transducer: - These transducers do not need any external source of power for their operation. Therefore, they are also called as self-generating type transducers. The active ... need external source of power for their operation. So they are not self-generating type transducers. 

Description : Draw and explain the construction and working of Dead Weight Tester.

Last Answer : Construction:- Deadweight Tester (DWT) is used for calibration of pressure gauges . A dead weight tester is an instrument that calibrates pressure by determining the weight of force divided by ... the error at each gauge reading and ensure that it is within the acceptable accuracy limits.

Description : Draw neat sketch of Rotameter and explain its working principle.

Last Answer : Rotameter: - A variable-area flowmeter is one where the fluid must pass through a restriction whose area increases with flow rate. The height of the float is directly proportional to the flowrate ... on glass tube and the flow rate can be determined by direct observation of the metering tube  

Description : Name the material used and the sensitivity of following thermocouple type: (i) J (ii) K (iii) R (iv) S

Last Answer : Material used and the sensitivity of following thermocouple:

Description : Draw and explain filled system thermometer.

Last Answer : ➢ Filled system thermometer Explanation:- Many physical properties change with temperature, such as the volume of a liquid, the length of a metal rod, the electrical resistance of a wire, ... be in absolute units. As the temperature changes ,volume of liquid changes by following equation  

Description : Compare U tube manometer and well type manometer

Last Answer : U-tube and well type manometer Sr.No. U-tube manometer well type manometer 1 Both legs are having same cross section area Both legs are having different cross section area ... cross section area. 5 Difference in heights in measured. Single height is measured.

Description : Give one application each of following transducer: (i) LVDT (ii) RVDT (iii) Capacitive (iv) Piezoelectric

Last Answer : i) LVDT ➢ LVDT used to measure force ➢ LVDT used to measure strain ➢ LVDT used to measure weight ➢ LVDT used to measure tension ➢ LVDT used to measure pressure ➢ The ... flow meters, non-destructive test (NDT) equipment's ➢ Piezoelectric materials are used in ultrasonic transducers.

Description : Explain calibration of capacitive type level measurement.

Last Answer : ➢ Calibration of capacitance type level transmitter 1. Remove the level transmitter from the system(tank). 2. check whether transmitter shows zero reading by connecting with multimeter otherwise release the ... rotate the span screw to 20ma. 3. Repeat these steps and check all readings

Description : Compare Bellows and diaphragm w.r.to construction, sensitivity, working principle and application.

Last Answer : Sr. No Points Bellows diaphragm 1 construction 2 sensitivity Less sensitive as compared to diaphragm  More sensitive as compared to diaphragm ... as well as for vacuum, compound and differential pressure applications. II. For corrosive gases and liquids

Description : Draw symbol and characteristic of LDR. Give material used for it.

Last Answer : Symbol of LDR: - ➢ Material used for LDR 1. Light Dependent Resistor (LDR) is made from a piece of exposed semiconductor material such as cadmium sulphide. 2. Materials used ... include, lead sulphide (PbS), lead selenide (PbSe), indium antimonide (InSb) which detect light in the

Description : Convert 45°C into Farhenite.

Last Answer : For 45 into ℉

Description : Give classification of level measurement methods.

Last Answer : Classification of Liquid Level Measurement: ➢ Direct method 1. Hook type 2. Sight glass type 3. Float type 4. Dip stick ➢ Indirect method 1. Hydrostatic pressure type 2. Electrical type: a) Capacitance level indicator b) Radiation level detector c) Ultrasonic level gauge 3. Radar type

Description : State the principle of ultrasonic flow meter

Last Answer : Principle of ultrasonic flow meter: In ultrasonic flow meters, the measurement of flow rate is determined by the variation in parameters of ultrasonic oscillations. Time Difference Type ultrasonic flow meters ... transverse a pipe section, both with and against the flow of liquid within the pipe.

Description : Write two advantages and applications of ultrasonic level measurement.

Last Answer : i) It is used for measurement of hazardous fluid level. ii) It is used for measurement of liquid or solid material level of tanks used by dairies, chemical plants, mineral companies. iii) It is used ... V) It is used for measurement of sand, crushed rock, and gravel level in gravel open-cast mines.

Description : Draw and explain the working principle of ultrasonic level measurement system. Also give advantages, disadvantages and applications of it.

Last Answer : Ultrasonic level detectors operate either by the absorption of acoustic energy as it travels from source to receiver or by the attenuation (frequency change) of a vibrating diaphragm face, oscillating at ... without making physical contact with the process material. 2. They have no moving parts.

Description : How do I maintain an ultrasonic flow meter?

Last Answer : Ultrasonic flow meters usually require a very low level of maintenance and is not usually needed until something goes awry. A change of batteries every once in a while may be able to help.

Description :  Answer the following S. No Statement Chose the correct  answer OR Fill-in-the-blanks 1 Fyrite measures CO2, O2 and SO2 True/False 2 Ultrasonic Flow Meter uses the principle of____& ____ Fill in the ... of RPM  meter is used and for a visible shaft-end _______ type of  RPM meter is used.

Last Answer : Sr  No Statement Chose the correct  answer OR Fill-in-the-blanks Solution 1 Fyrite measures CO2, O2 and  SO2 True/False False 2 Ultrasonic Flow Meter uses the  principle of____& ____ ... ]  10 In a gasification system the  reduction zone is above the  combustion zone True/False False

Description : Draw ultrasonic flow meter and explain its construction.

Last Answer : Construction : Figure shows the construction of time difference type ultrasonic flow meter. This consists of two transmitters and two receivers. These are separated by distance l and mounted as shown in ... receiver B, this do not favor the wave as it is opposite to the direction of flow.

Description : Describe principle of operation of Doppler type ultrasonic flow meter with diagram. 

Last Answer : Diagram: Working:  The flow meter consists of a crystal transducer mounted outside the pipe in which flow is to be measured. This transducer is a piezoelectric crystal which ... , so the frequency of the reflected wave is shifted to particle velocity, according to Doppler principle.

Description : State the advantages of instrument transformer in using for extension of range of meters. 

Last Answer : Advantages of instrument transformer: 1. Extension of instrument range is possible. 2. Isolation of instruments from high voltage side. 3. Power loss is less as compared to shunts and multipliers. 4 ... measurement. 5. It is economical method of range extension. 6. Increases in safety of operator.

Description : State principle of ultrasonic pulse-velocity test on concrete. 

Last Answer : Principle of ultrasonic pulse-velocity test: The working principle of ultrasonic pulse velocity test is as follows: The electronically generated mechanical pulses of specific frequency pass though concrete ... is measured to determine the ultrasonic pulse velocity and related quality of concrete. 

Description : State properties of ultrasonic waves.

Last Answer : i) Frequency of these sound waves is more than 20kHz ii) Shorter wavelength iii) They carry high amount of sound energy iv) The speed of propagation of ultrasonic waves increases with increase in ... . x) Posses certain vibrations which are used as good massage action in case of muscular pain. 

Description : Does anyone have experience with peak flow meters? I have some questions about what's considered "normal". (read on) questions about?

Last Answer : answer:I hope this helps you out. I know nothing but your issue but I looked around for a hopefully helpful link. Best of luck! Ruth http://www.lungusa.org/lung-disease/asthma/living-with-asthma/take-control-of-your-asthma/measuring-your-peak-flow-rate.html

Description : How accurate are different types of flow meters in measuring FEV1?

Last Answer : Generally, most flow meters are very accurate in FEV1. However, device accuracy is not especially important, rather it is essential that you take multiple measurements to calculate an accurate working average.

Description : Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flow-meters, because their __________ is very low/small. (A) Thermal conductivity (B) Electrical conductivity (C) Specific gravity

Last Answer : (C) Specific gravity

Description : . In magnetic flow meters, voltage generation is (A) Due to the motion of conducting fluid through an externally generated uniform field (B) Proportional to the fluid velocity (C) Both (A) and (B) (D) Neither (A) nor (B)

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

Description : The power generation potential in mini hydro power plant for a water flow of 3 m3 /sec with a head of 14 meters and with a system efficiency of 55% is a) 226.6 kW b) 76.4 kW c) 23.1 kW d) none of the above

Last Answer : a) 226.6 kW

Description : Write the names of any four flow meters used for flow measurement.

Last Answer : Flow meters used for flow measurement : Rotating vane meter, ultrasonic flow meter, Piston type flow meter, thermal flow meter, electromagnetic flow meter.

Description : At what ultrasonic frequency will gasoline atomize?

Last Answer : answer:I don't know the answer to your question, but I will be watching the newspapers for news of the explosion. I wouldn't want to use electrical equipment (such as the ultrasonic humidifier you mention) ... could level a house. So be careful, whatever you do. Welcome to Fluther, for now, anyway

Description : What is the difference between ultrasonic & subsonic sound ?

Last Answer : I think they're two completely different things.. Subsonic is any speed lower than the speed of sound (so you could say aircraft flight at airspeeds lower than the speed of sound in air ... frequency greater than the upper limit of human hearing (Ultrasonic is an adjective referring to ultrasound).