What are the examples of flow measurement techniques that use obstruction? A common method of measuring flow through an open channel is to measure the height of the liquid as it passes over an obstruction as a flume or weir in the channel. Common used is the Sharp-Crested Weir, the V-Notch Weir, the Cipolletti weir, the Rectangular-Notch Weir, the Parshall Flume or Venturi Flume.
What are obstruction type flow meters? Obstruction flow meters operate by introducing a restriction in the cross sectional area of a flowing fluid. Restricting the flow area causes a pressure drop across the obstruction, this pressure drop is cause by a change in the fluids velocity.
Which of the following represent obstruction type flow measuring system? Explanation: Pitot-static tubes are the devices used for measuring the velocity of the fluid. 6. Which of the following represents obstruction type flow measuring systems? Explanation: Static vane makes an obstruction in the path of fluid flow, which causes considerable pressure loss.
Which flow measuring device does not cause obstruction to flow? Explanation: Orifice plate, venture tube and flow nozzle all these devices are used for flow obstruction. Sphere can’t be used for flow obstruction. Explanation: An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow. It is also used to make temporary flow measurements.
What are the examples of flow measurement techniques that use obstruction? – Related Questions
What are obstruction type flow meters explain principle of its working?
The orifice meter, Venturimeter and flow nozzle work on the principle of constant area variable pressure drop. Here the pressure drop changes with flow rate and the area of obstruction are always constant. The rotameter works as a constant pressure drop variable area meter.
What are the examples of flow measurement techniques that use obstruction?
A common method of measuring flow through an open channel is to measure the height of the liquid as it passes over an obstruction as a flume or weir in the channel. Common used is the Sharp-Crested Weir, the V-Notch Weir, the Cipolletti weir, the Rectangular-Notch Weir, the Parshall Flume or Venturi Flume.
Which of the following is a flow measuring device?
The pitot tube are one the most used (and cheapest) ways to measure fluid flow, especially in air applications like ventilation and HVAC systems, even used in airplanes for speed measurent. The pitot tube measures the fluid flow velocity by converting the kinetic energy of the flow into potential energy.
Which of the following flow measuring device does not cause of obstruction to flow Mcq?
The correct answer is A, magnetic flowmeter. The output from a magnetic flowmeter is a linear signal that is proportional to the velocity of the flowing fluid.
Which of the following can be measured using tachometers?
1. Which of the following can be measured using tachometers? Explanation: Tachometers are special devices used to measure angular displacement of rotating shafts. 2.
What are other measurement technique for fluids flow rate?
A Pitot-tube is used to measure fluid flow velocity. The tube is pointed into the flow and the difference between the stagnation pressure at the tip of the probe and the static pressure at its side is measured, yielding the dynamic pressure from which the fluid velocity is calculated using Bernoulli’s equation.
How many types of flow meter are there?
Types of Flow Meters. There are two categories of flow meters: gas and fluid or liquid. Fluid flow meters have five subcategories: differential pressure, velocity, positive displacement, mass flow, and open channel.
What does a Venturi meter do?
A venturi works by measuring the difference in pressure at two different locations. The pressure difference is created by reducing the diameter of the pipe causing the fluid to flow faster. The fast moving fluid has a lower pressure than the slower fluid in the larger section of the venturi.
What is an obstruction meter?
Obstruction meters are devices with reduced flow area when installed in a pipe flow. This creates. pressure drop across the meter. Using the basic mass conservation and Bernoulli equations one can. calculate the flow through the pipe.
How does Coriolis flow meter work?
Instead of having a rotating frame of reference, Coriolis flow meters work on the principle that the inertia created by fluid flowing through an oscillating tube causes the tube to twist in proportion to mass flowrate. When fluid is moving through the tubes, the tubes twist in proportion to mass flowrate.
What is Venturimeter describe its construction and working?
A Venturi-meter is a device which is used to measure the rate of flow of a liquid through a pipe. It is an application of Bernoulli’s principle.
Does not use obstruction methods to measure flow rate?
A magnetic flowmeter is a volumetric flowmeter, which does not have any moving parts and is ideal for wastewater applications or any dirty liquid, which is conductive or water based. Magnetic flowmeters will generally not work with hydrocarbons.
What are the various method for measuring the flow in open channel?
The common method of measuring flow through an open channel is to measure the height or HEAD of the liquid as it passes over an obstruction (a flume or weir) in the channel. Using ultrasonic level technology, Open channel flow meters include a non-contacting sensor mounted above the flume or weir.
Which of the following flow measuring instrument is an area?
Explanation: Venturi meter is used to measure the flow rate through a tube. Rotameter is a area meter that is used to measure the volumetric flow of liquids and gases.
How is flow measured?
Flow is the volume of fluid that passes in a unit of time. In water resources, flow is often measured in units of cubic feet per second (cfs), cubic meters per second (cms), gallons per minute (gpm), or other various units.
Which of the following flow measuring instrument in an ammeter?
An ammeter (abbreviation of Ampere meter) is a measuring instrument used to measure the current in a circuit. Electric currents are measured in Amperes (A), hence the name. The ammeter is usually connected in series with the circuit in which the current is to be measured.
Which of the following devices is not used for pressure measurement?
Which of the following devices is not used for pressure measurement? Explanation: The devices used for the measurement of pressure is diaphragm gauge, strain gauge, pressure bellows, piezoelectric transducer, etc. The dynamometer is useful in agitation measurement and control. 9.
Which of the following device can be used for measuring torque Mcq?
Explanation: Dynamometers are the devices which are used to measure torque in rotating parts of machines, mainly torque of rotating shafts.
Can be measured using Tachogenerator?
2 Velocity. Many applications require the measurement of angular velocity. The commonest method is the tachogenerator which is a simple d.c. generator whose output voltage is proportional to speed. Speeds up to 10 000 rpm can be measured, the upper limit being centrifugal force on the tacho commutator.
What are the three types of flows?
The three movements were human capital flow, trade flow and capital or investment flow. They exploited and looted the Indian society and adversely affected the lives of people. Complete Answer: There were three major flows in the international economic change.
What are the 3 types of fluid flow?
The different types of fluid flow are: Steady and Unsteady Flow. Uniform and Non-Uniform Flow. Laminar and Turbulent Flow.