Chapter 19 LEVEL MCQs

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1. . Dipsticks are used for the ____________ measurement.





2. . The gauge on a tank provides an indication of level at all times. What category of level measurement would you say it represents?





3. . The gauge mounted at the bottom of a tank relies on hydrostatic pressure to provide a level indication. What type of level measurement device is it?





4. . Which of these terms is defined as the position of the surface of a liquid or a solid above or below a fixed reference point?





5. . Which of these direct level measurement devices has a weight attached to the end of a reel of flexible measuring tape?





6. . The pipe in a bubbler system is open at the bottom, but connected at the top to a pressure-sensitive gauge and ____________.





7. . The level of a liquid under pressure can be determined using ____________.





8. . Which of the following level-measurement technologies cannot be adapted to measure solid (powder) level in a vessel?





9. . Process level measurement is important because of ____________.





10. . To indicate the presence or absence of a liquid or solid at some point is known as _____________ level measurement.





11. . The measurement of the fluid level over a continuous range is known as ________ level measurement.





12. . Capacitance probe is a ____________ level measuring instrument.





13. . Float operated level measurement devices are ____________ type instruments.





14. . Which of the following conversions take place in float element?





15. . In displacement type level measurement, which law is used?





16. . A level gauge uses buoyant force to measure liquid level on a nearly stationary object called a ____________.





17. . In displacer a force measuring mechanism senses changes in the buoyant force and converts this force into an ____________.





18. . The amount of pointer rotation depends on the _______ of the displacer.





19. . The displacer gauge can be modified to use with a different liquid by replacing the displacer with one of a different ____________.





20. . For less dense liquid the _________ of the displacer is required.





21. . A sight glass is also called _________ glass.





22. . The principle of the Reflex Glass is based on the difference in the ________ of liquid and gas or in particular of water and steam.





23. . The main disadvantage of using gauge glass is that it is read _________.





24. . Refraction gauge is based on the principle of _________.





25. . Light is bent, or refracted, to a greater extent in water than in __________.





26. . In float level measurement float rests __________________ and follows the changing level of liquid.





27. . A floating body would always follow the varying liquid level because of its _________





28. . The top of the float is usually made _________ so that any solid suspensions in the liquid do not settle on the float and change its weight.





29. . As the level rises the apparent weight of the displacer _________.





30. . A liquid in a tank at rest exerts a force on the walls of the tank. This force in a liquid at rest, is known as _________.





31. . Hydrostatic pressure is proportional to the ________ of liquid in the tank.





32. . In open tank level measurement, the lower leg of the DP detector is _________.





33. . Conductivity probes operates on the principle that most liquids _______.





34. . An air purge system consists of a hollow tube known as _________ inserted in the liquid of the tank.





35. . The pressure gauge connected to the air purge system is calibrated in terms of liquid _________.





36. . In bubbler system when there is no liquid in the tank, the pressure gauge indicate _________.





37. . The speed of ultrasonic waves in air at 0 °C is ________ meter/second.





38. . The velocity of sound is proportional to the square root of ________.





39. . When the level of tank raises, the capacitance of probe varies due to change _________.





40. . Which one of the following is not a level measuring instrument?





41. . Which one of the following is not an indirect level measuring instrument?





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