Chapter 11 Steam Heating Systems

Question 1

In a gravity return system, the boiler should be placed:

a) Well above the highest radiator
b) Well below the lowest radiator
c) On an elevated platform
d) At the same level as the radiators

Answer 1

b) Well below the lowest radiator

Question 2

A pressure balancing device that prevents the boiler pressure from forcing the water in the boiler into the return line is called a:

a) pressure equalizer
b) bleed valve
c) Hartford loop
d) pressure control valve

Answer 2

c) Hartford loop

Question 3

If the water level falls too low during operation of a steam heating boiler the operator should:

a) Lower the flame and add water to bring it up to a safe level
b) Add more water immediately
c) Operate the safety valve
d) Shut the boiler down

Answer 3

d) Shut the boiler down

Question 4

Steam in a two-pipe, vacuum return system is supplied at a maximum pressure of _________.

a) 75 kPa (10 psi)
b) 50 kPa (7 psi)
c) 200 kPa (30 psi)
d) 103 kPa (15 psi)

Answer 4

d) 103 kPa (15 psi)

Question 5

Causes of insufficient steam supply to the heating units can be attributed to:

a) Improper pitch
b) Defective radiator valve
c) Clogging of connections and valve
d) All of the above

Answer 5

d) All of the above