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10 Cards in this Set
- Front
- Back
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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. |
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What is 1" water colum = to? |
.587 oz/in or .0361 lb in2 (psi) |
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One inch mercury displacement is = to _______ times as much as water |
13.6 |
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What is concave and convex in monometer caused by? |
Cohesion,adhesion and surface tension. |
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At what location do you read a manometer? |
The bottom of the meniscus |
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What is the first thing suggested to do on a U tube manometer if you have the supplies |
0 the reading. |
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Where is the most common location for taking line,standing and operating pressure for a gas line? |
The dirt pocket |
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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. |
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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. |
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What does gas consist of? |
Molecules that expand and contract while exerting pressure is all directions. |
