# Level Measurement MCQ Quiz With Answers

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Are you ready for this level measurement quiz that we have here for you? I this quiz, you will find questions on what level is and how continuous level measurement differs from single-point level detection. You need to be well-informed on this subject to score high on this quiz, as it is not going to be that easy challenge for you. So, do you think you are ready for this? Let us see as you take this quiz.

• 1.

### "If the zero point is at the top of a container, how would the level of a material in the container be measured?"

• A.

A. From the bottom of the container up to the surface

• B.

B. From the bottom of the container up to the top, then back down to the surface.

• C.

C. From the top of the container down to the surface

• D.

D. From the bottom of the container to the zero point

C. C. From the top of the container down to the surface
Explanation
If the zero point is at the top of the container, the level of the material in the container would be measured from the top of the container down to the surface. This means that the measurement would start at the highest point of the container and go downwards until it reaches the surface of the material.

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• 2.

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

• A.

A. Resistive

• B.

B. Multipoint

• C.

C. Continuous

• D.

D. Conductive

C. C. Continuous
Explanation
The gauge on a tank provides a continuous indication of the level at all times. This means that it constantly measures and displays the level, without any interruptions or gaps in the measurement. Therefore, it can be categorized as a continuous level measurement.

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• 3.

### "An electrical probe is used to detect a high level in a container. What type of level measurement does the arrangement represent?"

• A.

A. Restrictive level measurement

• B.

B. Continuity level measurement

• C.

C. Single-point level detection

• D.

D. Nutating level detection

C. C. Single-point level detection
Explanation
The arrangement described in the question involves using an electrical probe to detect a high level in a container. This indicates that only one point or location is being monitored to determine the level. Therefore, the arrangement represents single-point level detection.

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• 4.

### "Which level measurement devices work on the principle that liquid levels equalize in containers that are connected together?"

• A.

A. Gauge glass

• B.

B. Float and tape

• C.

C. Conductivity probes

• D.

D. Bubbler system

A. A. Gauge glass
Explanation
Gauge glass works on the principle that liquid levels equalize in containers that are connected together. It consists of a transparent glass tube connected to the container, allowing the liquid level to be visually observed. When the liquid levels in the connected containers equalize, the level in the gauge glass will also equalize, providing an accurate measurement of the liquid level.

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• 5.

### "Which type of measurement device is a plumb bob?"

• A.

A. Direct level measurement device

• B.

B. Direct flow measurement device

• C.

C. Indirect level measurement device

• D.

D. Turbulent flow measurement device

A. A. Direct level measurement device
Explanation
A plumb bob is a type of measurement device that is used to determine the verticality or alignment of a structure. It consists of a weight attached to a string or wire, which hangs freely and aligns itself with the force of gravity. By observing the position of the plumb bob, one can determine if a surface or structure is level or not. Therefore, it is considered a direct level measurement device.

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• 6.

### "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?"

• A.

A. Direct

• B.

B. Conductive

• C.

C. Indirect

• D.

D. Multipoint

C. C. Indirect
Explanation
The gauge mounted at the bottom of a tank relies on hydrostatic pressure to provide a level indication. This means that the gauge is not directly measuring the level of the tank, but instead is measuring the pressure exerted by the fluid in the tank. Therefore, it is considered an indirect level measurement device.

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• 7.

### "Select all of the choices that describe what the level of the indication on the gauge in a bubbler system represents."

• A.

A. The flow rate through the system

• B.

B. The amount of air pressure needed to clear the pipe

• C.

C. The hydrostatic pressure of the liquid above the pipe opening

• D.

D. The temperature of the liquid in the tank

B. B. The amount of air pressure needed to clear the pipe
C. C. The hydrostatic pressure of the liquid above the pipe opening
Explanation
The level of indication on the gauge in a bubbler system represents the amount of air pressure needed to clear the pipe and the hydrostatic pressure of the liquid above the pipe opening.

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• 8.

### "Select all of the statements that are true of the differential pressure cell on a tank."

• A.

A. It can measure the level in a pressurized tank.

• B.

B. It uses a float and tape to measure level.

• C.

C. It measures the difference between two related pressures.

• D.

D. It is a direct-level measurement device.

A. A. It can measure the level in a pressurized tank.
C. C. It measures the difference between two related pressures.
Explanation
The correct answer is A and C. The differential pressure cell on a tank can measure the level in a pressurized tank and it measures the difference between two related pressures. It does not use a float and tape to measure level, so statement B is false. It is also not specified whether it is a direct-level measurement device or not, so statement D cannot be determined.

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• 9.

### "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?"

• A.

A. Pressure

• B.

B. Level

• C.

C. Volume

• D.

D. Zero point

B. B. Level
Explanation
Level is defined as the position of the surface of a liquid or a solid above or below a fixed reference point. This term is used to describe the height or depth of a substance in relation to a specific point of reference.

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• 10.

### "Level measurement instruments may be designed for either continuous level measurement or what else?"

• A.

A. Restrictive level measurement

• B.

B. Continuity level measurement

• C.

C. Single-point level detection

• D.

D. Nutating level detection

C. C. Single-point level detection
Explanation
Level measurement instruments may be designed for either continuous level measurement or single-point level detection. Continuous level measurement instruments provide a continuous reading of the level of a substance, while single-point level detection instruments provide a single reading at a specific point in the container.

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• 11.

### "Select the statement that best describes the operating principle on which the use of a gauge glass is based."

• A.

A. A gauge glass is controlled by the flow of pressurized air.

• B.

B. The level in a gauge glass is half that in a tank.

• C.

C. Liquid levels equalize in containers that are connected together.

• D.

D. Fluid flow in a gauge glass varies with the size of the orifice plate in the tank.

C. C. Liquid levels equalize in containers that are connected together.
Explanation
The correct answer is C because a gauge glass is used to measure the level of liquid in a container. When containers are connected together, the liquid levels in them will equalize due to the principle of communicating vessels. This means that the liquid will reach the same level in all connected containers. Therefore, the statement that best describes the operating principle of a gauge glass is that liquid levels equalize in containers that are connected together.

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• 12.

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

• A.

A. Float and cable

• B.

B. Conductivity probe

• C.

C. Resistance tape

• D.

D. Plumb bob

D. D. Plumb bob
Explanation
A plumb bob is a direct level measurement device that consists of a weight attached to the end of a reel of a flexible measuring tape. The weight is usually made of metal and is used to determine verticality or alignment by the force of gravity. When the plumb bob is held or suspended, the weight hangs straight down due to gravity, allowing for accurate measurements of vertical distances or alignments. Float and cable, conductivity probe, and resistance tape are not direct level measurement devices that use a weight attached to a reel of flexible measuring tape.

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• 13.

### "Which physical factor does an indirect level measurement device use to provide a level indication?"

• A.

A. Hydrostatic pressure

• B.

B. Conductivity

• C.

C. Fluid volume

• D.

D. Turbulence

A. A. Hydrostatic pressure
Explanation
An indirect level measurement device uses hydrostatic pressure to provide a level indication. Hydrostatic pressure is the pressure exerted by a fluid due to the weight of the fluid above it. By measuring the pressure exerted by the fluid, the device can determine the level of the fluid. Conductivity, fluid volume, and turbulence are not directly used by an indirect level measurement device to provide a level indication.

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• 14.

### "The pipe in a bubbler system is open at the bottom but connected at the top to a pressure-sensitive gauge, and what else?"

• A.

A. A similar tank

• B.

B. A suction device

• C.

C. A regulated air supply

• D.

D. An orifice plate

C. C. A regulated air supply
Explanation
The pipe in a bubbler system is open at the bottom to allow water to flow in and out. However, it is connected at the top to a pressure-sensitive gauge, which measures the pressure of the air inside the pipe. In order to accurately measure the pressure, the pipe needs a regulated air supply. This ensures that the pressure inside the pipe remains constant and can be accurately measured by the gauge. A regulated air supply helps maintain the stability and reliability of the pressure readings in the bubbler system.

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• 15.

### "A D/P cell is connected by tubing to a pressurized tank containing a liquid. Which choice best describes the pressure that's exerted through the tubing that runs from the bottom of the tank to the D/P cell?"

• A.

A. Only the hydrostatic pressure of the liquid

• B.

B. Only the pressure added to the tank.

• C.

C. Atmospheric pressure

• D.

D. Hydrostatic pressure and the pressure added to the tank

D. D. Hydrostatic pressure and the pressure added to the tank
Explanation
The pressure exerted through the tubing that runs from the bottom of the tank to the D/P cell includes both the hydrostatic pressure of the liquid and the pressure added to the tank. This is because the hydrostatic pressure is determined by the height of the liquid column, while the pressure added to the tank is the additional pressure applied to the system. Therefore, both of these pressures contribute to the overall pressure exerted through the tubing.

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• Current Version
• Mar 22, 2023
Quiz Edited by
ProProfs Editorial Team
• Dec 06, 2011
Quiz Created by
Gshalansky

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