QUESTIONS AND ANSWERS LEVEL INSTRUMENTATION PART-2

QUESTIONS AND ANSWERS LEVEL INSTRUMENTATION

What is the definition for the term level as it applies to process measurement?

  1. Level refers to the amount of space occupied by an object or fluid in a tank. It can also be used
    to express the capacity of a container
  2. Level is defined as the amount of force applied by a pressurized fluid on each unit area of its
    container
  3. Level is defined as the position between phases, where the phases liquid/gas, solid/gas, or immiscible liquid/liquid.
  4. Level refers to the measure of the internal molecular activity of a substance

What should you consider when selecting a level measurement device?

  1. Physical properties of the process materials only
  2. Chemical properties of the process materials only
  3. Both the physical and chemical properties of the process materials
  4. A point measurement system or a continuous measurement system only

What are the two types of level measurement?

  1. Continuous and point
  2. Point and intermediate
  3. Intermediate and point
  4. Range and specific point

What is the definition of level as it applies to the measurement of process variables?

  1. The horizontal distance between the interface and one or more specific points
  2. The vertical distance between the interface and one or more specific points
  3. The horizontal distance between the interface and the flow over point
  4. The total distance gained or lost by the process material gage

Two important types of level measurement are:

  1. Point and intermediate
  2. Intermediate and point
  3. Continuous and point
  4. Range and specific point

Level, as it applies to the measurement of process variables, is defined as:

  1. The horizontal distance between the interface and one or more specific points
  2. The horizontal distance between the interface and the flow over point
  3. The total distance gained or lost by the process material gage
  4. The vertical distance between the interface and one or more specific points

Which of the following objectives must be defined when selecting a level measuring instrument?

  1. Remote versus local
  2. Standard versus defined
  3. Open versus sealed
  4. Primary versus secondary

What are two ways a level measuring device uses to detect the location of the interface?

  1. Estimated and gaged
  2. Direct and inferential
  3. Indirect and direct
  4. Inferential and estimated

Before selecting a level measuring device, you must:

  1. Obtain instrument documentation
  2. Outline the entire process
  3. Define measurement objectives
  4. Examine surrounding environment

Which properties must be considered when selecting a level measuring device?

  1. Characteristics of the environment surrounding the process only
  2. Chemical properties of the process material only
  3. Physical properties of the process material only
  4. Both physical and chemical properties of the process material

Which measuring device would you use if you were measuring a highly viscous processed liquid?

  1. Sight glass
  2. Plastic tube
  3. Float
  4. Dipstick

In a float device which component indicates the level of the substance on the scale plate?

  1. Float ring
  2. Collar magnet
  3. Switch magnet
  4. Follower

Which of the following level measuring devices is weighted at one end to ensure vertical insertion?

  1. Steel tape
  2. Sight glass
  3. Dipstick
  4. Float

What is considered the simplest direct method of measuring process level?

  1. Audible
  2. Visual
  3. Mechanical
  4. Electrical

Which of the following devices consists of a length of rigid material with graduated lines?

  1. Steel tape
  2. Sight glass
  3. Dipstick
  4. Float

The simplest direct method of measuring process level is by:

  1. Audible alert
  2. Mechanical detection
  3. Electrical detection and signal
  4. Sight

Crude level measurement of granular solids or highly viscous process liquids can be obtained with a:

  1. Dipstick
  2. Sight glass
  3. Float
  4. Steel tape

Which level measuring device can be used for crude level measurement of granular solids or highly viscous process liquids?

  1. Steel tape
  2. Dipstick
  3. Sight glass
  4. Float

Each of the following are limitations to the dipstick or steel tape devices EXCEPT:

  1. Cannot be used in processes that require pressure or temperature control
  2. Cannot be used for toxic or corrosive gases
  3. Cannot be used with process materials other than liquids
  4. Requires an open process container for insertion

Which measuring device would you use if you were measuring the level container of granular solids?

  1. Steel tape
  2. Float
  3. Sight glass
  4. Dipstick

Which level measuring device operates on the principle that liquid seeks the same level when equal Pressure is exerted on the surface of two connected columns?

  1. Sight glass
  2. Dip gage
  3. Float cylinder
  4. Float tube

Which level measuring device is used in closed, low-pressure systems?

  1. Dip gage
  2. Sight glass
  3. Steel tape
  4. Dipstick

A device installed with service valves that allow it to be isolated from the process is called a:

  1. Dip tube
  2. Float tube
  3. Sight glass
  4. Ball-check tube

What type of device operates on the principle that liquid seeks the same level when equal pressure is exerted on the surfaces of two connected columns?

  1. Steel tape
  2. Dipstick
  3. Float
  4. Sight glass

Using a sight glass to measure level involves a risk of:

  1. Glass breakage
  2. Inaccurate level readings
  3. Overheating
  4. Process product evaporation

Sight glass devices should be installed:

  1. In a hidden location
  2. Where risk of breakage is small
  3. At a 45 degree angle for ease of viewing
  4. At or near the top of the process container

What risk is involved when using a sight glass to measure level in a process container?

  1. Inaccurate level readings
  2. Overheating
  3. Glass breakage
  4. Process product evaporation

 

Why are sight glasses often difficult to read?

  1.  Process fluid may not be transparent
  2. Condensation obscures view of scale
  3. Level markings can be hard to identify
  4. Tanks are often inaccessible

Which of the following devices can locate liquid/gas interfaces directly and continuously?

  1. Float sensor
  2. Sight glass
  3. Dipstick
  4. Steel tape

Float sensors may be isolated from disturbances that affect level indication by using a:

  1. Float ring
  2. Stilling well
  3. Follower
  4. Vapor barrier

What type of visual level sensing device employs an object with a lower density than the process liquid?

  1. Dipstick
  2. Steel tape
  3. Float sensor
  4. Sight glass

Which level measuring device uses a stilling well to isolate disturbances that may affect level Indications?

  1. Steel tape
  2. Sight glass
  3. Dipstick
  4. Float sensor

The secondary magnet in a magnetic float device is called the:

  1. Follower
  2. Collar magnet
  3. Switch magnet
  4. Floater

What is the purpose of the follower in a magnetic float device?

  1. To stabilize the collar magnet
  2. To indicate level on a scale plate
  3. To stabilize the switch magnet
  4. To provide balance for the float device

The second or “follower” magnet in a magnetic float device is enclosed in a:

  1. Collar
  2. Float ring
  3. Nonferrous tube
  4. Scale plate

In a magnetic float device, which component indicates level on the scale plate?

  1. Float ring
  2. Collar magnet
  3. Switch magnet
  4. Follower

The alarm or control device in a magnetic float switch mechanism is often a:

  1. Mercury switch
  2. Contact with the process substance
  3. Manual control panel
  4. Follower magnet

What type of visual level indicating device is designed to activate switches that transmit signals to a Remote device?  

  1. Float sensor
  2. Magnetic float switch mechanism
  3. Sight glass assembly
  4. Steel tape device

What moves the mercury switch in a magnetic float switch mechanism?

  1. Process fluid
  2. Manual intervention
  3. Magnetic force
  4. Electrical current

 

 

 

 

 

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