Explanation: A rotameter is a device that measures the flow rate of fluid in a closed tube. It is a variable area type of flow meter. In this, a float rises inside a conically shaped glass tube, as the flow increases, its position on a scale can be read off as the flow rate.

What is rotameter used to measure?

A rotameter (variable area meter) is a flow meter that measures volumetric flow of liquids and gases. There is no difference between a rotameter and flow meter, and these terms are used interchangeably.

Which of the following is measured by rotameter?

Rotational speed of solid shafts.

What is measured by rotameter Mcq?

Explanation : Rotameter is used to measure flow of fluids.

Where is rotameter used?

Glass-tube rotameters are more frequently used in situations where a single fluid is being exhausted via several different channels (Figure 2-17). Another appropriate application of the glass-tube rotameters is when several streams of gases or liquids are being metered at the same time or mixed in a manifold.

Rotameter (Working And Animation)

21 related questions found

Can measure pressure directly?

on a given surface. The applied pressure can be measured as absolute, gauge or differential pressure. Pressure can be measured directly by measurement of the applied force or indirectly, e.g. by the measurement of the gas properties.

How do Rotometers work?

A Rotameter is a form of variable area flow meter which has a simplistic operation whereby a liquid or gas passes through a tapered tube. In order for this gas to pass through the tube it must first raise a float held within the tube. ... In both cases, the greater the flow then the higher up the tube the float moves.

What is manometer used to measure?

A manometer is an instrument used to measure and indicate pressure. There are two types of manometers, analog and digital. ... Inches of water column is the most common form of measurement in the HVAC industry when measuring static or gas pressure, although other units of measure are available and used worldwide.

Why is it called a rotameter?

The variable-area flowmeter is called a rotameter because the float spins, or rotates, as the flow passes it. The spinning float is a clear indication that fluid is flowing. Variable-area technology was invented in Germany more than 100 years ago.

Which Metre is used to measure pressure directly?

The Barometer:

The barometer is a device meant for measuring the local atmospheric pressure. Fig. 2.18 shows a mercury barometer which consists of a 1 metre long glass tube closed at one end and completely filled with mercury and kept inverted in a bowl of mercury.

Which of the following can be measured with the help of piezo electric crystal?

Detailed Solution. A piezoelectric transducer is used for measuring non-electrical quantities such as vibration, acceleration, pressure, and the intensity of sound. Piezoelectric accelerometer: It is a sensor that is used to measure acceleration by using the piezoelectric crystal.

Which of the following instrument can be used for measuring speed of an Aeroplane?

airspeed indicator, instrument that measures the speed of an aircraft relative to the surrounding air, using the differential between the pressure of still air (static pressure) and that of moving air compressed by the craft's forward motion (ram pressure); as speed increases, the difference between these pressures ...

Which of the following flow measuring instrument is an area meter?

Rotameter is a area meter that is used to measure the volumetric flow of liquids and gases. Pitot tube is used to measure fluid flow velocity.

What is Venturimeter used for?

A venturi meter is also called a venturi flowmeter. It is used to calculate the velocity of fluids in running through a pipeline. The fluid may be a liquid or a gas. The meter consists of a pipe with a narrowing throat that expands back to it's original diameter on the other side of the choke point.

Which of the following is the instrument used for measurement of pressure?

Barometer measures atmospheric pressure in terms of bars or atmosphere. Manometer is an instrument which is used to measure the gas pressure.

Which quantity can be measured using a differential manometer?

A differential manometer is a device that measures the difference in pressure between two places.

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.

How many types of flowmeters are there?

We're going to look at five main types of flowmeters you can find on the market today, including differential pressure flowmeters, velocity flowmeters, positive displacement flowmeters, mass flowmeters and open-channel flowmeters.

What is fluid flow measured in?

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.

When and manometer is used for measuring?

Manometers are precision instruments that are used to measure pressure, which is the force exerted by a gas or liquid per unit surface area owing to the effects of the weight of that gas or liquid from gravity.

Can a manometer measure liquid pressure?

Liquid manometers measure differential pressure by balancing the weight of a liquid between two pressures. Light liquids such as water can measure small pressure differences; mercury or other heavy liquids are used for large pressure differences.

Why mercury is used in manometer?

Mercury is a useful material to use in a manometer because of its high density. This means that a much shorter column is needed compared to water. For instance, the pressure represented by a column of 100 mm of water is just under 7.4 mm of mercury (mmHg).

What is the principle of rotameter?

Working principle of rotameters

It consists of a tapered tube; as fluid passes through that tube, it raises the float. Greater volumetric flow exerts more pressure on the float, lifting it higher.

What is Venturi flow meter?

Venturi meters are flow measurement instruments which use a converging section of pipe to give an increase in the flow velocity and a corresponding pressure drop from which the flowrate can be deduced. They have been in common use for many years, especially in the water supply industry.

What do you mean by rotameter?

: a gauge that consists of a graduated glass tube containing a free float for measuring the flow of a fluid.