🔍
Compare variable head flow meter with variable area flow meter.
0 like 0 dislike

1 Answer

Parameter
Variable head flowmeter
Variable area flowmeter
Working principle
Restriction or obstacle is placed in the path of flow to create a differential Pressure.
The pressure difference is kept constant by changing the restriction area.
Basic Construction
The construction depends on the type of primary element used. Accordingly these are of the following types 1) Orifice plate 2) Venturi tube 3) flow nozzle
Tapered transparent glass tube with lesser diameter at the bottom fitted with a metal float inside, called rotameter.
Maintenance cost
minimum
minimum
Use
Used in viscous fluid slurries and dirty fluids.
In laboratories and testing and production lines.
0 like 0 dislike

Related questions

List variable flow meter. 
Answer : 1. Variable area : Rotameter 2. Variable head : a) Venturi b) Orifice c) Pitot tube d) Nozzle...

View solution
0 like 0 dislike
1 answer

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

View solution
0 like 0 dislike
1 answer

State advantages & disadvantages of electromagnetic flow meter.
Answer : Advantage: Provides wide linear range. 2) Ability to measure reverses flow. 3) Gives rapid response to flow changes. 4) No obstruction is created to flow. 5) It can handle corrosive as ... and pipe networks with relatively short inside diameters. 3) It is useful for electrically conducting fluid. ...

View solution
0 like 0 dislike
1 answer

Draw venture meter and write steps to measure flow rate.
Answer : Venturi meter consists of three sections that is converging section, throat section and diverging section. The flow is introduced to the meter through the inlet with diameter D' . The inclined angle ... to 15o . Flow rate is proportional to the square root of the differential pressure. ...

View solution
0 like 0 dislike
1 answer

Compare variable reluctance and permanent magnet motors.
Answer : Variable reluctance Motor  Permanent magnet motors   The rotor is not magnetised The rotor is magnetised  High torque to inertia ratio  Low torque to inertia ratio  ... rotor has salient pole construction The rotor has mostly smooth cylindrical type of construction.  ...

View solution
0 like 0 dislike
1 answer

50.5k questions

47.1k answers

240 comments

7.0k users