Chapter 22 Air Conditioning Systems I

Question 1

1. All of the following equipment may be part of a roof top unit except:
A. Heating coil
B. Dehumidifier
C. Filter
D. Cooling coil
E. Fan

Answer 1

B. Dehumidifier

Question 2

2. One of the main disadvantages of the central air conditioning system is the:
   A. One key component failure may result in a shutdown of the air conditioning system
   for the entire building
   B. Noise and vibration can be more easily and effectively controlled
   C. Large central equipment components have higher operating efficiencies
   D. Large central equipment components have lower initial cost per unit output
   E. System is easier to operate and maintain

Answer 2

A. One key component failure may result in a shutdown of the air conditioning system
for the entire building

Question 3

3. The function an air conditioning system that provides a source of outside air to
   replenish the oxygen supply for the occupants, to dilute odours which develop in
   the building and to provide makeup air for the washroom exhaust systems is:
   A. Heating
   B. Cooling
   C. Ventilation
   D. Humidification
   E. Filtration

Answer 3

C. Ventilation

Question 4

4. The single zone, constant air volume system is similar to the \_\_\_\_\_ system.
A. Terminal reheat
B. Dual duct
C. Multi-zone
D. Rooftop unit system
E. Forced air furnace

Answer 4

D. Rooftop unit system

Question 5

5. The multi-zone system may use a preheat coil in colder climates for heating mixed
air to \_\_\_\_\_ a supplementary humidifier can be installed in the hot deck for winter
humidification.
A. 10°C (50°F)
B. 15.5°C (60°F)
C. 12.5°C (55°F)
D. 20.5°C (69°F)
E. 18.5°C (65°F)

Answer 5

C. 12.5°C (55°F)

Question 6

6. The function an air conditioning system that provides for the removal of excessive
   moisture from the building to maintain a relative humidity that is acceptable to
   occupants and for operation of sensitive equipment is:
   A. Dehumidification
   B. Cooling
   C. Ventilation
   D. Humidification
   E. Filtration

Answer 6

A. Dehumidification

Question 7

7. The most common central air conditioning system is the:
A. Terminal reheat system
B. Dual duct system
C. Forced air furnace
D. Multi-zone system
E. Roof top unit

Answer 7

C. Forced air furnace

Question 8

8. The multi-zone system is a constant volume system in which the discharge of the
   air handling unit has been modified to provide multi-zone control capability with the
   cooling coils and heating coils located downstream from the fan so that the _____
   may flow into two separate discharge compartments, called a hot deck” and a “cold
   deck.”
   A. Return air
   B. Supply air
   C. Recycled air
   D. Inlet air
   E. Exhaust air

Answer 8

B. Supply air

Question 9

9. A larger residence, located in an area with colder winters would require a more
complex system to maintain satisfactory conditions on a year-round basis including
all except:
A. Heating
B. Filtration
C. Ventilation
D. Humidification
E. Cooling

Answer 9

E. Cooling

Question 10

10.The category of air conditioning system that provides each individual room or zone
with a self-contained air conditioning unit to maintain desired environmental
conditions is the \_\_\_\_\_ system.
A. Dual Duct
B. Central
C. Unitary
D. Combined
E. Terminal reheat

Answer 10

C. Unitary

Question 11

11.Each application of a heating, ventilation and air conditioning system is unique and
its requirements vary in accordance with all except:
A. Geographical location
B. Local weather conditions
C. Time of occupancy
D. Building layout
E. Construction

Answer 11

C. Time of occupancy

Question 12

12.The function an air conditioning system that provides a source of heat to offset the
heat loss to the atmosphere surrounding the building through the exterior walls
and roof and through floor slabs on grade and basement walls is:
A. Heating
B. Cooling
C. Ventilation
D. Humidification
E. Filtration

Answer 12

A. Heating

Question 13

13.An example of a unitary air conditioning system could be all of the following except
a:
A. Window air conditioner
B. Terminal reheater
C. Packaged air conditioner
D. Unit ventilator
E. Rooftop unit

Answer 13

B. Terminal reheater

Question 14

14.Regardless of the type of air conditioning system, the air is mainly conditioned in
a/an:
A. Air handling unit
B. Air conditioner
C. Heating coil
D. Cooling coil
E. Forced air furnace

Answer 14

A. Air handling unit

Question 15

15.The amount of outdoor air for a 12.5°C (55°F) mixed air temperature is reduced to
approximately _____ during the coldest winter days.
A. 5%
B. 10%
C. 20%
D. 15%
E. 25%

Answer 15

D. 15%

Question 16

16.All of the following equipment may be part of a unit ventilator except:
A. Humidifier
B. Heating coil
C. Filter
D. Cooling coil
E. Fan

Answer 16

A. Humidifier

NOTE: NOT PART OF UNIT VENTILATOR

Question 17

17.The category of air conditioning system that provides air filtration, heating, cooling,
and/or humidification in an air handling unit located in a central mechanical room
in the building is the \_\_\_\_\_ system.
A. Dual Duct
B. Unitary
C. Combined
D. Central
E. Terminal reheat

Answer 17

D. Central

Question 18

18.The function an air conditioning system that provides a source of moisture to
maintain acceptable conditions for human comfort and to minimize the effects of
static electricity is:
A. Heating
B. Cooling
C. Ventilation
D. Humidification
E. Filtration

Answer 18

D. Humidification