Unit 11 Building Environmental Systems Flashcards
Furnace heat exchangers should be checked for corrosion because:
Select one:
a. Carbon monoxide could leak into the building
b. Cold air could leak into the building
c. The air will become too dry for comfort
d. Too much air could enter the furnace
a. Carbon monoxide could leak into the building
In newer steam heating systems, the condensate discharged by the steam traps drains by gravity through the return piping to: Select one: a. The boiler b. A condensate tank c. A combination feeder/cut-off control. d. A deaerator
a. Allow for drainage of condensate
Which two dampers operate together in an HVAC system?
Select one:
a. fresh air, exhaust air
b. fresh air, return air
c. return air, mixed air
d. return air, exhaust air
a. fresh air, exhaust air
What is the generally accepted minimum amount of fresh air to satisfy human comfort and health?
Select one:
a. 25%
b. 5%
c. 15%
d. 10%
c. 15%
What is an indicator of excessively high building static pressure?
Select one:
a. Occupants may get headaches
b. Doors that open to the outside may be difficult to open.
c. Kitchen and washroom exhaust fans will not ventilate correctly
d. Doors that open to the outside may stay open, or be difficult to close.
d. Doors that open to the outside may stay open, or be difficult to close.
All supply and drain lines of a steam heating system must be pitched to:
Select one:
a. Allow for drainage of condensate
b. Allow collection of air at the highest points
c. Prevent corrosion
d. Allow for thermal expansion
a. Allow for drainage of condensate
What kind of water is used in a clean steam humidification system?
Select one:
a. raw water
b. soft water
c. Demineralized water
d. potable water
c. Demineralized water
Which of these statements about hydronic heat pumps is TRUE?
Select one:
a. Hydronic heat pump systems discharge heat to the outdoors during the cooling mode.
b. A single heat pump can provide simultaneous heating and cooling to several independent zones.
c. On hot days, when the cooling load is high, the heat recovered from the zones can reduce the firing rate of the hot water boiler.
d. Hydronic heat pump systems cannot provide ventilation air.
a. Hydronic heat pump systems discharge heat to the outdoors during the cooling mode.
Two methods of calculating air infiltration into a building are the: Select one: a. Crack and attrition method b. Air change and solar method c. Crack and conduction method d. Air change and crack method
d. Air change and crack method
The level in the condensate receiver may be automatically controlled by a: Select one: a. Float switch b. Pressure reducing valve c. Gate valve d. Drain valve
a. Float switch
One of the advantages of the radiant panel hot water heating system over the conventional heating system is:
Select one:
a. Radiant panel heating systems require less piping
b. Radiant panel heating systems provide less resistance to water flow
c. Radiant panel systems are lower in cost
d. Radiant heat panels distribute heat more evenly throughout the room
d. Radiant heat panels distribute heat more evenly throughout the room
Which of the following air handling systems is NOT suitable for providing cooling simultaneously to several distinct locations in a building?
Select one:
a. A roof top unit
b. A dual duct system
c. A high velocity terminal reheat system
d. A multi-zone system
a. A roof top unit
A \_\_\_\_\_\_\_\_ is a fired heater installed where the heat is needed, that heats the air directly without the use of any ducting. Select one: a. Unit heater b. Unit ventilator c. Convector d. Rooftop uni
a. Unit heater
When air is forced through a heating unit that contains both a fan and a coil, the unit is called: Select one: a. A unit heater b. An induction unit c. A unit ventilator d. A convector
a. A unit heater
A radiator valve is used to control the amount of: Select one: a. Air leaving the radiator. b. Condensate leaving the radiator. c. Steam leaving the radiator. d. Steam entering the radiator.
d. Steam entering the radiator.
The flow of water in a multi-zone hot water heating system is controlled by:
Select one:
a. Diverter fittings
b. Balancing valves
c. A circulating pump for each heating zone
d. Induction coils in each heating zone
c. A circulating pump for each heating zone