Chapter 7

Question 1

A device designed to permit the flow of air or non-condensable gasses out of the vent, but stop the flow of steam.

Answer 1

Air vent

Question 2

An air vent that utilizes a float filled with temperature sensitive liquid that senses the temperature difference between steam and non-condensable gasses to operate a valve, venting the gasses while preventing steam from escaping

Answer 2

Thermostatic air vent (float type)

Question 3

A condensate return system that uses no pump or other mechanical means to initiate flow back into the boiler

Answer 3

Gravity flow condensate return steam system

Question 4

Any return line that is located below the NOWL of a boiler. This return line is completely full of condensate water and does not contain steam or air

Answer 4

Wet return

Question 5

Steam and condensate flow in the same pipe but in the opposite directions called counter flow.

Answer 5

One- pipe counterflow gravity return

Question 6

A steam heating system in which supply steam to HTUs and its condensate return to the boiler flow in the same pipe.

Answer 6

One pipe steam heating system

Question 7

Steam and condensate flow in the same direction with the system piping

Answer 7

One pipe parallel flow gravity return

Question 8

Any return line located above NOWL

Answer 8

Dry return

Question 9

A steam heating system in which one pipe supplies steam to HTUs while a separate pipe conveys the resulting condensate flow back to the boiler by gravity

Answer 9

Two pipe gravity flow heating system

Question 10

When a steam trap must discharge to and overhead return line, the pressure needed to raise the condensate must be added to the pressure at the overhead return line in order to obtain the total pressure needed to discharge condensate into the return line

Answer 10

True