Book 2 Chapter 22: Air Conditioning Systems

Question 1

What are some of the contaminants removed by filtering the air?
A) Pollen
B) Smoke
C) Dust
D) All of the above

Answer 1

D) All of the above

Question 2

How many sets of motorized dampers are there on a conventional air handling unit?
A) 4
B) 3
C) 5
D) 2

Answer 2

B) 3

Question 3

What is the mixed air temperature set point when part of an air handling unit?
A) 10ºC (50ºF)
B) 18.5ºC (65ºF)
C) 12.5ºC (55ºF)
D) 20.5ºC (69ºF)

Answer 3

C) 12.5ºC (55ºF)

Question 4

Which of the following equipment is part of a unit ventilator?
A) Fan
B) Heating/cooling coil
C) Manually adjustable duct connection
D) All of the above

Answer 4

D) All of the above

Question 5

What is the supply temperature of the cold deck air in a dual duct system?
A) 12.5ºC (55ºF)
B) 8.25ºC (47ºF)
C) 18.5ºC (65ºF)
D) 21.5ºC (71ºF)

Answer 5

A) 12.5ºC (55ºF)

Question 6

Dual duct central air conditioning systems:
A) Use terminal reheat boxes
B) Use hot and cold air mixing boxes
C) Do not provide outside air
D) Do not provide individual zone control
E) Use variable air volume boxes

Answer 6

B) Use hot and cold air mixing boxes

Question 7

Which central air conditioning system has zone temperature control provided by coils in the branch ducts?
A) Terminal reheat system
B) Constant air volume system
C) Unit ventilator system
D) Unitary system
E) Heat pump system

Answer 7

A) Terminal reheat system

Question 8

The unitary air conditioning system that uses a direct expansion refrigeration system to provide cooling and dehumidification in a local area without ductwork is called a/an:
A) High velocity terminal re-heat system
B) Rooftop unit
C) Unit ventilator
D) Window air conditioner
E) Multi-zone system

Answer 8

D) Unit ventilator

Question 9

A source of cooling is required to:
A) Offset the heat loss to the atmosphere
B) Offset the humidity gain
C) Offset the heat gain from the atmosphere
D) Replace the exhaust air
E) Replace the ventilation air

Answer 9

C) Offset the heat gain from the atmosphere

Question 10

The air conditioning equipment not meant for multi-zone usage is a:
A) Multi-zone system
B) Dual duct system
C) High velocity terminal reheat system
D) Low velocity terminal reheat system
E) Roof top unit

Answer 10

E) Roof top unit

Question 11

The air conditioning intake section arrangement which draws in room air, conditions it, and then returns it into the room is referred to as:
A) 100% outdoor air circulation
B) Full recirculation
C) Mixed air circulation
D) Blended circulation
E) Fixed percentage outdoor air circulation

Answer 11

B) Full recirculation

Question 12

For air conditioning, which is responsible for getting outside air into the building to replenish the oxygen supply?
A) Heating
B) Humidification
C) Cooling
D) Ventilation
E) Air circulation

Answer 12

D) Ventilation

Question 13

Which of the following statements about the unit ventilators is false?
A) The units provide cooling only
B) The units provide individual room temperature control
C) Room air is mixed with outside air
D) The units are used in areas with limited available floor space
E) The units provide heating

Answer 13

A) The units provide cooling only

Question 14

Which of the following statements about multizone systems is true?
A) The system cannot operate a humidifier
B) When hot deck is fully opened, the cold deck is fully closed
C) The dampers are out of phase by 10ºC
D) The cooling coils are installed in-line
E) All of the above

Answer 14

B) When hot deck is fully opened, the cold deck is fully closed

Question 15

Air movement is required in each space to assist in dissipation of _______ and to prevent a build up of _______, which may develop in stagnant areas.
A) Heat, odours
B) Odours, moisture
C) Coolness, heat
D) Heat, moisture

Answer 15

A) Heat, odours

Question 16

Unitary, Central, and Combined are:
A) Hot air heating systems
B) Main categories of air conditioning systems
C) Types of condensers
D) Main categories of air compressors
E) Main air distribution duct systems

Answer 16

B) Main categories of air conditioning systems

Question 17

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 system is:
A) Ventilation
B) Humidification
C) Heating
D) Cooling
E) Filtration

Answer 17

A) Ventilation

Question 18

One of the two compartments in a window air conditioner contains the supply air plenum, a low efficiency air filter and the:
A) Condenser coil to provide heating
B) Condenser coil to provide cooling
C) Evaporator coil to provide cooling
D) Evaporator coil to provide heating
E) Evaporator coil to provide ventilation

Answer 18

C) Evaporator coil to provide cooling

Question 19

The high velocity terminal reheat system requires a terminal reheat box in each zone to:
A) Reduce the air flow to low velocity
B) Reduce the air flow to high velocity
C) Reduce the air temperature to low temperature
D) Increase the air flow to high velocity
E) Reduce the air pressure to low pressure

Answer 19

A) Reduce the air flow to low velocity

Question 20

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

Answer 20

B) Time of occupancy

Question 21

One of the two compartments in a window air conditioner contains the compressor,________ and the condenser fan.
A) Air cooled evaporator coil
B) Water cooled condensing coil
C) Air heated condenser coil
D) Water cooled evaporator coil
E) Air cooled condensing coil

Answer 21

E) Air cooled condensing coil

Question 22

The air handling unit may include all except a/an:
A) Filters
B) Air sanitizer
C) Motorized dampers for airflow control
D) Source of heating and cooling
E) Fan

Answer 22

B) Air sanitizer

Question 23

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

Answer 23

C) Forced air furnace

Question 24

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

Answer 24

D) Dehumidifier

Question 25

The function an air conditioning system that provides for the removal of contaminants such as dust, dirt, smoke, pollen, and lint from recirculated air and from outside air before it is:
A) Humidification
B) Cooling
C) Heating
D) Filtration
E) Ventilation

Answer 25

D) Filtration