HVAC 6005 - Air Conditioning Systems I (Chp 22)

Question 1

Dual duct central air conditioning systems:

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

Answer 1

E) Use hot and cold air mixing boxes

Question 2

Which central air conditioning system has zone temperature control provided by coils in the branch ducts?

A) Terminal reheat system
B) Unit ventilator system
C) Unitary system
D) Heat pump system
E) Constant air volume system

Answer 2

A) Terminal reheat system

Question 3

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) Window air conditioner
D) Unit ventilator
E) Multi-zone system

Answer 3

C) Window air conditioner

Question 4

A source of cooling is required to:

A) Replace the ventilation air
B) Offset the heat loss to the atmosphere
C) Offset the humidity gain
D) Replace the exhaust air
E) Offset the heat gain from the atmosphere

Answer 4

E) Offset the heat gain from the atmosphere

Question 5

The air conditioning equipment not meant for multi-zone usage is a:

A) High velocity terminal reheat system
B) Multi-zone system
C) Dual duct system
D) Low velocity terminal reheat system
E) Roof top unit

Answer 5

E) Roof top unit

Question 6

For air conditioning, which is responsible for getting outside air into the building to replenish the oxygen supply?

A) Cooling
B) Ventilation
C) Heating
D) Air circulation
E) Humidification

Answer 6

B) Ventilation

Question 7

Which of the following statements about the unit ventilators is false?

A) The units provide heating
B) The units provide cooling only
C) The units are used in areas with limited available floor space
D) The units provide individual room temperature control
E) Room air is mixed with outside air

Answer 7

B) The units provide cooling only

Question 8

Which of the following statements about multizone systems is true?

A) When hot deck is fully opened the cold deck is fully closed
B) The system cannot operate a humidifier
C) The dampers are out of phase by 10°C
D) All of the above
E) The cooling coils are installed in-line

Answer 8

A) When hot deck is fully opened the cold deck is fully closed

Question 9

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, moisture
B) Odours, moisture
C) Heat, odours
D) Coolness, heat
E) Odours, moisture

Answer 9

C) Heat, odours

Question 10

Unitary, Central, and Combined are:

A) Hot air heating systems
B) Main categories of air compressors
C) Main air distribution duct systems
D) Main categories of air conditioning systems
E) Types of Condensers

Answer 10

D) Main categories of air conditioning systems

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) Fixed percentage outdoor air circulation
B) Mixed air circulation
C) Blended circulation
D) 100% outdoor air circulation
E) Full recirculation

Answer 11

E) Full recirculation