Test 4 Flashcards
2018 Final prep (30 cards)
List two reasons why it is essential to monitor the level of material in a
container.
to determine if there is enough material to complete a job; to determine inventory; to prevent a container from under filling
Using the weight of an object is method of measuring level.
a noninvasive
Weight measurements can be used to determine the level of in a tank.
liquids
solids
Where is the pressure detector placed in a vessel to measure the level of a
liquid?
at the bottom
A conductive probe is capable of making _____-type measurements.
point
Capacitance measurements are made to determine the level bymethod(s).
continuous
A differential pressure to determine level is used in vessel.
a closed
When a differential pressure technique is used to measure level in a pressurized vessel, the low pressure sensor of the DP device is generally connected to __________.
the vapor space above the stored fluid
A __________ -type level device is used to measure a liquid-liquid interface tank.
displacement
In a purge level measurement system, the amount of pressure required to force air through the tube is __________ proportional to the amount of liquid in the tank.
directly
Which of the following quantitative values are used to indicate level?
height
percentage
volume
weight
Ultrasonic sensors detect the level of a medium by measuring the time lapse between the ____________________ and ____________________ of the sound waves.
transmission,
detection
__________ measurement devices are also referred to as being invasive.
direct
Which of the following level measurement techniques are an example of checking the level of oil in you car with a dipstick?
direct
invasive
Displacers used in level measurement systems are __________ of the measured fluid.
Heavier than or equal to the volume
The wet-bulb and dry-bulb instruments measure _____.
relative humidity
Static electricity is more likely present in _____ air.
Dry
A fossil fuel is considered a combustible gas.
False
The dew point is most likely to be reached when the air temperature.
decreases
The term _____refers to the tendency of a material to absorb
moisture.
hygroscopic
The letter “p” in the term pH refers to , and the letter
“H” refers to
negative logarithm
hydrogen
Electrode conductivity probes that measure conductivity make
measurements at different ranges by _____.
changing the dimensions of the plates
pH measurements are based on __________ in a solution
hydrogen
Water purity is primarily determined by measuring __________.
conductivity
