Self-Test B-1.2: Low-Pressure Steam Heating Systems

Complete Self-Test B-1.2 and check your answers.

1. What is the maximum steam pressure that a residential steam heating system should operate at?
   1. 2 psig
   2. 15 psig
   3. 30 psig
   4. 100 psig

    

2. Latent heat rather than steam pressure does the actual heating work in a residential steam heating system.
   1. True
   2. False

    

3. What is the name of the control that operates the boiler’s burner?
   1. Thermostat
   2. Pressuretrol
   3. Boiler reset
   4. Operating aquastat

    

4. What is the name of the horizontal steam pipe that joins together the boiler outlets?
   1. Header
   2. Equalizer
   3. Supply main
   4. Hartford loop

    

5. What is the name of the vertical pipe that balances the pressure between the supply and return side of the boiler?
   1. Riser
   2. Header
   3. Equalizer
   4. Supply main

    

6. What is the name of the type of system in which steam and condensate travel in opposite directions in the steam main piping?
   1. Two pipe
   2. Wet return
   3. Counterflow
   4. Parallel flow

    

7. On a gravity return two-pipe steam heating system, what is the minimum height required between the centre of the gauge glass and the bottom of the lowest steam per psi of boiler pressure?
   1. 10 cm
   2. 0.433 ft
   3. 30 in.
   4. 2.31 in.

    

8. How does the boiler-feed pump activate (not condensate pump)?
   1. The pump is activated by the boiler pressuretrol.
   2. The pump is activated by a reverse-acting aquastat.
   3. A float switch turns the pump on when water level inside the boiler drops.
   4. A float switch turns the pump on when water level inside the receiver rises.

    

Answer Key: Self-Test B-1.2 is on the next page.