Which of the following describes a method to measure levels directly?

• Using a pressure gauge

• Using a float

• Using a thermometer

• Using a barometer

Fill in the blank: Instruments used to measure levels indirectly often rely on ______.

• direct contact

• pressure changes

• visual indicators

• temperature variations

Which of the following is a measurement device used to measure temperature?

• Barometer

• Thermometer

• Anemometer

• Hygrometer

A _______ is used to measure pressure.

• A) Thermometer

• B) Barometer

• C) Anemometer

• D) Hygrometer

What is the primary function of a sight glass?

• To measure temperature

• To indicate liquid level visually

• To control pressure

• To filter impurities

A sight glass can function as a control device when additional components, such as ______, are added.

• filters

• switches

• thermometers

• valves

What is the main advantage of displacers as shown in the diagram?

• They are inexpensive

• They can be serviced without accessing the vessel

• They are lightweight

• They require no maintenance

Fill in the blank: Displacers can usually be serviced and calibrated without accessing the _______.

• A) torque tube

• B) standpipe

• C) vessel or enclosure

• D) water level

What is the simplest form of indirect level measurement?

• Ultrasonic sensors

• Magnetic float units

• Radar level transmitters

• Pressure transducers

Fill in the blank: In a magnetic float unit, the ______ is responsible for triggering the magnetic switch.

• Visual indicator

• Magnet

• Float

• Water level