The temperature control on a steam to hot water converter, controls

The temperature control on a steam to hot water converter, controls

a) the pump speed
b) the steam temperature
c) the water flow
d) the steam control valve
e) the firing rate





Answer: D

To ensure that each zone circuit has the proper flow of water to provide the required heat a:

To ensure that each zone circuit has the proper flow of water to provide the required heat a:

a) flow control valve is used
b) diverter fitting is used
c) gate valve is used
d) pressure reducing valve is used
e) balancing valve is used





Answer: E

The air removed by the air separator is vented to the

The air removed by the air separator is vented to the

a) air space at the top of the boiler
b) nearest convector
c) dip tube
d) expansion tank
e) relief valve






Answer: D

An air separator should always be installed in

An air separator should always be installed in

a) a horizontal pipe
b) a cross tee
c) a vertical pipe
d) an expansion tank
e) a converter





Answer: A

Diverter fittings are used in the supply lines to heating units

Diverter fittings are used in the supply lines to heating units

a) to compensate for a low heating load
b) when a higher heating output is required from the heating unit
c) when the distance from the boiler to heating unit is short
d) when there are no balancing valves installed in the supply line
e) when a hydraulic balance must be corrected




Answer: B

Snow melting systems are usually filled with

Snow melting systems are usually filled with

a) water only
b) methanol and water
c) ethylene glycol and water
d) steam
e) warm air




Answer: C

In radiant heating system changes are

In radiant heating system changes are

a) difficult to make
b) easy to make
c) as easy to make as in any other heating system
d) dependent on availability of materials
e) dependent on location





Answer: A

In a radiant heating system the maximum surface temperature is

In a radiant heating system the maximum surface temperature is

a) 10 degrees C
b) 20 degrees C
c) 30 degrees C
d) 40 degrees C
e) 50 degrees C






Answer: C

One of the advantages of the radiant panel hot water heating system over the conventional heating system is:

One of the advantages of the radiant panel hot water heating system over the conventional heating system is:

a. Less piping is needed
b. Low water flow resistance
c. Low in cost
d. Ease of repair of heating coils
e. Even heat distribution throughout the rooms




Answer: E

In a one pipe hot water system, the fitting that directs the water to each converter is called the:

In a one pipe hot water system, the fitting that directs the water to each converter is called the:

a. Diverter
b. Balancing valve
c. Vent valve
d. Separator
e. Syphon





Answer: A

One of the advantages of the forced circulation heating systems as compared to the gravity heating systems is:

One of the advantages of the forced circulation heating systems as compared to the gravity heating systems is:

a. Large pipes can be used
b. Small pipes can be used
c. Low maintenance
d. Low cost
e. Low power consumption




Answer: B

The system which allows the highest water temperature is the:

The system which allows the highest water temperature is the:

a. Ice melt system
b. Radiant panel system
c. Closed expansion tank system
d. Open expansion tank system
e. Reverse return system






Answer: C

One of the disadvantages of the gravity hot water system is:

One of the disadvantages of the gravity hot water system is:

a. The water temperature must be very high to compensate for heat losses
b. Piping used must be rated for high temperature services
c. There is a slow response to changes in heat demand
d. The maximum water temperature is limited to approximately 100°C
e. High maintenance




Answer: C

Because of the different circuit lengths to each convector, the direct return hot water system is difficult to:

Because of the different circuit lengths to each convector, the direct return hot water system is difficult to:

a. Construct
b. Maintain
c. Return water to the boiler
d. Balance
e. Design





Answer: D

Advantages of the high temperature hot water systems are:

Advantages of the high temperature hot water systems are:

a. Reduction in pipe size and greater heat storage capacity
b. Low water make-up and better temperature control
c. High vacuum in the return lines and pumps
d. Higher make-up and better chemical control
e. High-pressure piping and controls

Answer: A

The two pipe reverse return hot water heating system has the advantage of:

The two pipe reverse return hot water heating system has the advantage of:

a. All circuits have the same length
b. Low cost
c. No circulating is needed
d. Elimination of an expansion tank
e. Elimination of air vents





Answer: A

Automatic snow melting systems do not use:

Automatic snow melting systems do not use:

a. Hot water and antifreeze mixtures
b. Electric resistance heating
c. Infrared lamps mounted above sidewalks and ramps
d. Hot water and ethylene glycol mixed
e. Forced air heat





Answer: E

Which of the following is NOT a hydronic heating system?

Which of the following is NOT a hydronic heating system?

a. Loop system
b. One pipe system
c. Two pipe direct return system
d. Two pipe reverse return system
e. A wet-return system






Answer: E

The maximum temperature of water in a gravity hot water system is:

The maximum temperature of water in a gravity hot water system is:

a. 65°C
b. 70°C
c. 77°C
d. 87°C
e. 120°C





Answer: C

The flow of water in a multiple-circuit hot water heating system is controlled by:

The flow of water in a multiple-circuit hot water heating system is controlled by:

a. Vacuum pumps
b. Diverter fittings
c. Balancing valves
d. A circulating pump in each heating zone
e. An expansion tank in each heating zone





Answer: D