HVAC 6018 - Hot Water Heating Systems (Chp 4)

Question 1

A hot water boiler of the “same output” is:

A) Smaller than a steam boiler
B) The same size as a steam boiler
C) Larger than a steam boiler
D) Taller than a steam boiler
E) Shorter than a steam boiler

Answer 1

A) Smaller than a steam boiler

NOTE:A hot water boiler of the “SAME OUTPUT” is:

Question 2

A hot water heating system is also known as a _____ heating system.

A) Hydronic
B) Warm air
C) Loop
D) Radiant panel
E) Circulation

Answer 2

A) Hydronic

Question 3

Snow melting systems are usually filled with:

A) Warm air
B) Water only
C) Steam
D) Ethylene glycol and water
E) Methanol and water

Answer 3

D) Ethylene glycol and water

NOTE: ‘‘Snow melting systems’’

Question 4

The maximum temperature of water in a gravity hot water heating system is limited to approximately:
A) 70ºC
B) 65ºC
C) 67ºC
D) 87ºC
E) 77ºC

Answer 4

E) 77ºC

NOTE: ‘‘maximum temperature of WATER IN A GRAVITY HOT WATER heating system’’

Question 5

An air lock on a hot water heating system:

A) Requires more complex piping to prevent than in a steam system
B) All of these answers are correct
C) Is a more difficult problem than in a steam system
D) Will block circulation
E) Will cause some areas of the system to be cold

Answer 5

B) All of these answers are correct
NOTE: 
A)  more complex piping 
C) more difficult 
D) Will block circulation
E) Will cause some areas of the system to be cold

Question 6

In a ‘‘one-pipe hot water heating system’’ the fitting that directs the water to each convector is called the:

A) Diverter
B) Separator
C) Trap
D) Vent valve
E) Lead

Answer 6

A) Diverter

Question 7

In a radiant panel heating system the maximum floor surface temperature is:

A) 20ºC
B) 30ºC
C) 10ºC
D) 50ºC
E) 40ºC

Answer 7

B) 30ºC

NOTE: radiant panel heating system the maximum

Question 8

In a ‘‘hot water heating system’’ compared to a ‘‘steam heating system’’, if there is a leak the damage will:

A) Depend on where the boiler is located in the system
B) Be greater in the steam system
C) Be about the same in either system
D) Be greater in the hot water system
E) Be minimal due to the automatic drain system

Answer 8

D) Be greater in the ‘‘HOT WATER SYSTEM’’

NOTE:’‘hot water heating system’’ compared to a ‘‘steam heating system’’

Question 9

In many buildings, the hot water heating system is divided into several circuits and the flow of water is controlled by a/an:

A) Expansion tank in each heating zone
B) Circulating pump in each heating zone
C) Thermometer
D) Thermostat
E) Thermocouple

Answer 9

B) Circulating pump in each heating zone

NOTE” ‘‘hot water heating system is divided into several circuits’’

Question 10

One of the advantages of hot water heating as compared to steam heating is:

A) Hot water boilers are more fuel efficient
B) Water treatment is almost eliminated
C) More piping is needed
D) Less damage in the event of a leak
E) Lower maintenance cost

Answer 10

E) Lower maintenance cost

NOTE: ‘‘advantages of hot water heating as compared to steam heating is:’’