Deck 18: Steam Heat

Question 1

_________________________ direct return systems often use balancing valves to evenly distribute water flow through each branch.

Answer 1

Two-pipe

Question 2

Steam is circulated through the system as a vapor to the steam terminal unit, where it is condensed to liquid and returned to the boiler.

Answer 2

True

Question 3

A ________________________________________ is located at the water level to prevent the boiler from overheating.

Answer 3

low-water fuel cutoff control

Question 4

The ______________________________ and pressure gauge are installed with a connector between them that prevents raw steam from reaching the indicator mechanism, which is a Bourdon tube.

Question 5

______________________________ pumping systems use circulators in both the primary and secondary loops.

Question 6

A _________________________ should be provided with each steam boiler so that the technician can see the boiler water level at a glance.

Question 7

Gas- and oil -fired steam boilers are much like hot water boilers.

Question 8

______________________________ units receive steam vapor and condense it while adding heat to something, usually the conditioned space.

Question 9

_________________________ valves prevent gravity flow through hot water loops when the circulators are off.

Question 10

Steam heat is similar to hot-water heat, except the latent heat of the steam vapor contains a larger amount of heat.

Question 11

Water level is not critical in a steam boiler because the heat-exchange surface is just below the operating water level.

Question 12

The _________________________ line is larger than the liquid condensate return line.

Question 13

System pressure differences in a steam system will cause the water level in a boiler to fluctuate up and down without a special piping arrangement called a _________________________.

Question 14

_________________________ systems utilize monoflo or diverter tees to balance water flow.

Question 15

_________________________ are used to control water flow to different zones in the structure in order to maintain different temperatures in those areas.