Font size
WorksheetsLEVEL INCT2
Total questions: 46
Worksheet time: 37mins
is probably the first process variable to be measured and controlled.
(a)
This method uses a direct measurement of the distance (usually height) from the datum line.
(a)
This method of level measurement involves converting readouts and data of a known quantity, such as pressure ratio to the volume.
(a)
Media that is being measured in level measurement are usually fluids, and they can’t be solids or combination of fluid and solid.
True
False
Instruments used to measure the level directly.
Sight glass
Displacer
Hydrostatic Head
Float Gauge
Dip Sticks
A device that rides on the surface of the fluid or solid within the storage vessel.
(a)
Indirect or inferred methods of level measurement depend on the material having a physical property which can be measured and related to level.
True
False
It utilizes the theory of Archimedes Principle which states that “the force produced when a body is submerged into liquid with a constant density is equal to the fluid displaced” which means that when a body is partially or fully immersed in any liquid, it is reduced in weight by an amount equal to the weight of the volume of the liquid displaced.
(a)
(a) is used for the measurement of level or filling height of a liquid.
"Regardless of the shape and volume of a vessel or tank, the hydrostatic pressure at the measuring point of a tank or vessel is proportional only to the filling height."
(a)
The radiation level measurement technique is used to measure the level of fluid or solid in a closed tank using (a) .
A (a) is a force transducer for measuring weight. Its output signal is proportional to the weight being measured
(a) measure the distance to the target by measuring the time between the emission and reception.
Conductivity level switches operate on the principle of (a) .
Level measurement can be obtained through direct or indirect continuous monitoring, as well as single point detection.
TRUE
FALSE
Level sensing can be single point, (a) , direct, or indirect.
(a) is often used as an indirect method of measuring liquid levels
Direct measures require pulling data related to actual student behavior or work.
TRUE
FALSE
The industrial level sensors keep track of the amount of product in storage containers.
TRUE
FALSE
Gauge glasses are cheap but easily broken and should be used with hazardous liq uid .
TRUE
FALSE
Most gauges are mainly used to specify if the dimensions of the measuring object are less or greater than defined standards that are not within the tolerance range.
TRUE
FALSE
The advantages of the float sensor are that they are almost independent of the (a) of the liquid or solid being monitored, are accurate and robust, and have a linear output with level height.
Sonic and ultrasonic devices are reliable, accurate, and cost-effective.
TRUE
FALSE
Ultrasonic sensors are used primarily as proximity sensors.
TRUE
FALSE
A sight glass or (a) is a type of level sensor , a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within .
Processing plant operators use sight glasses to: Verify the production stages of a process visually. Inspect media or fluids for changes in color or consistency.
TRUE
FALSE
The level can be calculated using the liquid's (a) and pressure.
The indirect method of level measurement involves converting readouts and data of a unknown quantity, such as pressure ratio to the volume.
TRUE
FALSE
Common indirect technique for determining liquid levels is pressure.
TRUE
FALSE
Level is the second most measured parameter after temperature in process industries.
TRUE
FALSE
Displacement instruments determine liquid level by sensing the (a) exerted on a displacer by the liquid it displaces.
Displacer level switches can be used in a variety of industrial applications, including those where the measured material may be heavy oils, dirty liquids, liquids with solids, and paints.
TRUE
FALSE
(a) level probes consist of a long rod or cable that protrude into a vessel and its contents.
It measure 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.
(a)
The level bubbler can be used to monitor intake screens for debris and initiate an airburst backwash.
TRUE
FALSE
A (a) stretches the entire height of the vessel, and contact is made between two resistive wires by the head pressure against the submerged length of the tape.
A load cell works by converting (a) into digital values that the user can read and record.
All liquids and gases in the presence of gravity exert an upward force known as the buoyant force on any object immersed in them
TRUE
FALSE
Measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects. synonyms: radar, radio detection and ranging, radiolocation.
(a)
It is measured as the ratio of the current that flows to the existing potential difference.
(a)
Process temperature also effects conductivity.
TRUE
FALSE
(a) level measuring instruments are used for level detection in silos, tanks and bunkers, for both limit detection and continuous measurement.
Capacitance is used in industries ranging from aircraft maintenance to tire manufacturing.
TRUE
FALSE
(a) instrumentation yields a signal when radiation interacts with a sensitive material.
A physical balance can be used to measure both mass and weight of an object.
TRUE
FALSE
This type of meter is capable of measuring the continuous measurement of bulk solids with grain size up to 20 mm, e.g. sands, minerals, plastics, agricultural products, foodstuffs, pharmaceuticals and solid fuels.
(a)
