Deck 9: Ventilation Systems

Question 1

Which of the following is/are components of ventilation and Indoor Air Quality (IAQ)?

A) cleanliness
B) air velocity
C) temperature
D) all of the above

Answer 1

all of the above

Question 2

An HVAC system that is out of balance will have:

A) good energy efficiency.
B) very quiet operation throughout the space.
C) generally unhappy occupants -- many will be too hot or too cold.
D) none of the above

Answer 2

generally unhappy occupants -- many will be too hot or too cold.

Question 3

Which of the following is/are problems that can arise from poor ventilation?

A) bad odors
B) mold growth
C) occupant health problems
D) all of the above

Answer 3

all of the above

Question 4

How does a cooling tower create the risk of Legionnaires' Disease?

A) The cooling tower has warm water that provides a good environment for the Legionnaires' Disease bacteria to thrive.
B) The cooling tower emits water vapor that can be sucked into the building's outside air supply.
C) The cooling tower is a closed system, so there really isn't any risk of Legionnaires' Disease from this source.
D) Both A and B.

Question 5

The recommended range for indoor relative humidity is:

A) 20 - 40%.
B) 50 - 70%.
C) 30 - 50%.
D) 40 - 60%.

Question 6

If the air velocity in a room is too low, the room will feel ________ to occupants; if it's too high, the room will feel ________.

A) cold; stuffy
B) stuffy; cold
C) Air velocity does not have any effect on how occupants feel in the room

Question 7

The two pathways for air to travel through the ventilation system are called:

A) grilles and diffusers.
B) fans and coils.
C) in and out.
D) supply and return.

Question 8

In the U.S., the rate of ventilation is described in terms of:

A) cubic yards per minute.
B) cubic feet per second.
C) cubic inches per minute.
D) cubic feet per minute.

Question 9

Why is drain pan maintenance important in the ventilation system?

A) The drain pan may drain condensate away from the HVAC.
B) The drain pan can get clogged, leading to a water overflow which can damage the surrounding area.
C) The drain pan can retain water, providing a good environment for microbial growth which may be stinky and dangerous to human health.
D) Both B and C.

Question 10

What does the term "outside air"refer to, when used in the context of a ventilation system?

A) the air outside the building
B) the amount of air that we need to add to the ventilation system to replace air that has been used in the system
C) the air when it is not inside the ventilation system
D) factors other than air in the ventilation system