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What are manometers used for?
To measure gas line pressure using water for low pressure measure and mercury for high pressure.
What is 1" water colum = to?
.587 oz/in or .0361 lb in2 (psi)
One inch mercury displacement is = to _______ times as much as water
13.6
What is concave and convex in monometer caused by?
Cohesion,adhesion and surface tension.
At what location do you read a manometer?
The bottom of the meniscus
What is the first thing suggested to do on a U tube manometer if you have the supplies
0 the reading.
Where is the most common location for taking line,standing and operating pressure for a gas line?
The dirt pocket
What is manifold pressure and where is the measurement taken?
It is the "firing" pressure and it is taken AFTER the appliance regulator and BEFORE the burner orifices.
What device(s) are used to take pressure readings in the venting system? What is there main advantage?
Draft gauges and magnahelic gauges
They are used for extremely low accurate pressure measurements.
What does gas consist of?
Molecules that expand and contract while exerting pressure is all directions.
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