Flashcards in Level Test 114 Deck (15):
What engineering unita are used for level measurement?
Feet and percent
If a vessel is isolated level may change due to what?
Thermal expansion and atmospheric pressure
What is the specific gravity of water?
A _____ does not need a wet leg
What two legs make up a dry leg transmitter?
One that measures tank pressure and another exposed to the atmosphere
What two legs make up a wet leg transmitter?
A leg filled with a liquid and one leg that measures tank pressure
When measuring from a tape gauge where is 100%?
At the top
What would happen if a sight glass without blocking valves breaks?
Liquid would spill up to the level of the glass
What type of level measurement does a sight glass provide?
What is continuous level measurement used for?
To detect a change in level
What is point level used for?
Low level alarm
Can head pressure be negative?
No. dumb ass
When using pressure to measure level in a vessel what needs to be known?
The specific gravity of the liquid
Measuring a fluid starting at the bottom and extending up to the surface is a measure of what?