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WorksheetsEET 6 FINAL
Total questions: 86
Worksheet time: 1hrs 21mins
Material level in a tank or vessel is a common process variable in plants.
TRUE
FALSE
The selection of the right level measurement solution is based on not only the choice of measurement technology but also the application and installation requirements.
TRUE
FALSE
(a) are typically used for high-high or low-low level sensing to prevent plant personnel and/or process equipment from being in harmful conditions.
(a) sense the tank level as a percent of span of the probes capabilities.
(a) , as the name implies, requires that the sensing element be in contact with material being measured.
The use of non-contact level sensors eliminates agitator interference.
TRUE
FALSE
(a) is often simple because measuring the level is just a matter of measuring the height of the substance in a vessel.
(a) of level measurement involves converting readouts and data of a known quantity, such as pressure ratio to the volume.
APPLICATIONS OF ULTRASONIC SENSOR (3)
LIMITATIONS OF AN ULTRASONIC SENSOR (4)
What does the Ultrasonic Level Transmitter measure?
(a)
Continuous nuclear level detection is typically used where most other technologies are successful.
TRUE
FALSE
The more radiation the detector sees, the lower the process level.
TRUE
FALSE
Use tubes and chambers for nuclear particle detection.
(a)
These sensors gave high energy resolutions which makes them popular for detection of exact amount of radiation energy.
(a)
(a) uses a focused beam of radiation directed at a small detector, that senses the presence or absence of the beam.
Technologies such as radar, ultrasonic and differential pressure are all affected to some extent by foam or changes in gas density, giving errors in critical level measurements.
TRUE
FALSE
A (a) calibration (e.g. with water) is more convenient if a vessel can only be filled with one defined homogeneous media.
A common example of a two-point calibration is to calibrate a temperature sensor using an ice-water bath and boiling water for the two references.
TRUE
FALSE
Radiation from the source is detected on the other side of the tank.
TRUE
FALSE
(a) is similar to the noncontact radar probes, only a rod or cable is immersed into the material like an RF capacitance probe.
When an interface level of two immiscible layers should be measured, the first fluid should have a higher dielectric.
TRUE
FALSE
Whether a GWR transmitter is measuring liquids or solids, a concentrated travels from the sensor down the metallic probe
(a)
IT IS USED TO MEASURE THE AMOUNT OF LIQUID IN A CONTAINER, ESPECIALLY THE AMOUNT OF OIL IN A CAR ENGINE.
(a)
DISADVANTAGES OF DIPSTICK (2)
A (a) LEVEL SENSOR IS A TWO-WIRE ELEMENT IMMERSED IN A LIQUID, WHICH CHANGES RESISTANCE AS LIQUID LEVEL INCREASES
(a) are critical instruments used in the process industries to determine the condition and level of fluids and media in both tanks and pipelines.
Sight glasses are also suitable for dark or dirty liquids.
TRUE
FALSE
A (a) works to detect the level of liquid in a tank by using a float, magnet, and reed switch system that automatically opens and closes when water levels rise and fall inside the tank.
A DEVICE THAT MEASURES TWO OPPOSING PRESSURE IN A SEALED HOUSING.
(a)
This is the most common application for differential pressure measurement, used in industrial oil filter applications, air filter monitoring in gas turbines, and filter monitoring such as membrane sensing in water/wastewater facilities.
(a)
(a) level sensor use Archimedes ’ Principle to detect liquid level by continuosly measuring the weight of a displacer rod immersed in the process liquid
Thedisplacer level sensor is usedinlevel measurement applications suchas knock- outpots, condensatedrums, separators, flashvessels, storagevessels andreceiver tanks.
TRUE
FALSE
Float Switches are available with a glandless design and are NOT capable of fail safe operation in extreme process conditions, unlike displacers, which if the torque tube fails can provide a leak path.
TRUE
FALSE
(a) devices are widely used for measuring the level of both liquids and solids in powdered or granular form.
The RF admittance probe measures total (a) rather than just capacitance.
(a) measures water level based on the amount of pressure it takes to push an air bubble out of an orifice line (plastic tubing) and into the water body.
The level bubbler can be used to measure the level of the wet well to control the intake pumps.
TRUE
FALSE
Bubble tube devices are not susceptible to density variations, freezing and plugging or coating by the process fluid or debris. The gas that is used can introduce unwanted materials into the process as it is purged.
TRUE
FALSE
A (a) is a transducer used to convert a force acting on it into measurable electrical output.
It is the pressure present within a fluid when it is at rest.
(a)
Hydrostatic level sensors measure the hydrostatic pressure which is inversely proportional to the measured liquid height.
TRUE
FALSE
Laser transmitters used for level measurement basically work upon the same operating principle as ultrasonic level sensors.
TRUE
FALSE
As compared to ultrasonic and microwave waves, the wavelength of light waves is very long, due to which they experience no virtual beam divergence, hence a laser beam can be targeted on a point without facing any intervention from the nearby entities.
TRUE
FALSE
(a) can be defined as the quantification of movement of a fluid.
(a) implemented differential pressure to judge water flow.
Is a property of gas or liquid that is a measure of its resistance to motion or flow
(a)
It occurs when the flow velocity is high, and the particles no longer flow smoothly in layers and turbulence, or a rolling effect occurs.
(a)
It is the volume of liquid flowing over a period and is measured in gallons, cubic feet, liters and so forth.
(a)
R is a derived relationship combining the density and viscosity of a liquid with its velocity of flow and the cross-sectional dimensions.
(a)
(a) of a liquid occurs when its average
velocity is comparatively low, and
the fluid particles tend to move smoothly
in layers
is the volume of liquid passing a given point in each amount of time and is typically measured in gallons per minute (gpm), cubic feet per minute(cfm), liter per minute and so on total flow
(a)
Bernoulli's equation essentially describes the relationship between the pressure, velocity and elevation of a flowing liquid.
TRUE
FALSE
Flow measurements are normally indirect measurements using differential pressures to measure the flow rate.
TRUE
FALSE
(a) type orifice plate incorporates an integral gasket, either oval or octagonal ring, for mounting between ring type joint flanges.
(a) are one of the most popular devices for the measurement and control of fluid flow.
(a) , which are constrictions or “throats” in fluid conduits, are regions of reduced pressure that are used in several devices.
(a) is an engineered primary flow element for non-viscous and erosive fluids under high velocity and pressure, which would wear or damage orifice plates.
IT IS A SHORTENED VERSION OF VENTURI METERS.
(a)
APPLICATIONS OF DALL TUBE (4)
An air velocity meter measures the speed or flow of air or wind.
TRUE
FALSE
They are in the form of a disc that oscillates, allowing a known volume of fluid to pass with each oscillation.
(a)
Commonly known as paddle-wheel technology.
(a)
A (a) meter is based on the principles of motion mechanics. When the process fluid enters the sensor ,it is split.
The dry particulates are allowed to pass-through a conveyer belt, as the flow rate change the particulate falls in the load changes, it indicates the flow rate.
TRUE
FALSE
A flow measuring weir is a structure over which water flows in such a way that volumetric flow rate can be calculated.
TRUE
FALSE
As the fluid approaches the orifice the pressure increases slightly and drops suddenly as the orifice is passed. It continues to drop until the (a) is reached and then gradually increases until at approximately 5 to 8 diameters downstream, a maximum pressure point is reached that will be lower than the pressure upstream of the orifice.
The flow transmitters not only measure the flow rate but also help in controlling and monitoring it.
TRUE
FALSE
PARTS OF FLANGE TAPS (6)
This tapping provides the high- and low-pressure tapping points, respectively.
(a)
An (a) enables flow measurement by creating a differential pressure (DP) that is proportional to the square of the velocity of the fluid in the pipe, in accordance with Bernoulli’ s theorem.
These methods are concerned with measurement of the flow of solids that are in the form of small particles.
(a)
The (a) flowmeter is primarily used to measure the mass flow rate of liquids, although it has also been successfully used in some gas flow measurement applications.
Thermal mass flowmeters are primarily used to measure the flow rate of gases.
TRUE
FALSE
It is often the basis of other measurements such as flow, level, density, viscosity and even temperature.
(a)
Differential pressure meters involve the insertion of some device into a fluid-carrying pipe that causes an obstruction and creates a pressure difference on either side of the device.
TRUE
FALSE
One limitation of the orifice plate is that its accuracy is typically at least ±2% and may approach ±5%.
TRUE
FALSE
Nozzles with a rounded, funnel-like inlet clearly reduce turbulence and thus create high pressure loss.
TRUE
FALSE
In the variable area flowmeter, the differential pressure across a variable aperture is used to adjust the area of the aperture.
TRUE
FALSE
(a) flowmeters account for nearly 10% of the total number of flowmeters used in industry and are used in large numbers for metering domestic gas and water consumption.
It consists of a spring-loaded, hinged flap mounted at right angles to the direction of fluid flow in the fluid carrying pipe.
(a)
Turbine flowmeters are less rugged and reliable than flow restriction type instruments.
TRUE
FALSE
Consists of a stainless-steel cylindrical tube, fitted with an insulating liner, which carries the measured fluid.
(a)
Electromagnetic flowmeters are limited to measuring the volume flow rate of electrically conductive fluids.
TRUE
FALSE
(a) flow meters are suitable for a variety of applications and industries but work best with clean, low-viscosity, medium to high-speed fluids
(a) flow meters are ideal for wastewater applications or any dirty liquid which is conductive, or water based.
