Ventilation and Air Filters

Question 1

In a mechanical air intake, natural exhaust ventilation system the pressure in the building is:

A) Well above atmospheric pressure
B) Slightly below atmospheric pressure
C) At atmospheric pressure
D) Slightly above atmospheric pressure
E) Well below atmospheric pressure

Answer 1

D) Slightly above atmospheric pressure

Question 2

Which of the following is considered an advantage of a mechanical ventilation system?

A) The system does not require any electrical power
B) The system generates its own heat and cooling
C) The entire system only requires one fan
D) Controlled amounts of filtered and heated air can be supplied
E) The system does not require any duct work

Answer 2

D) Controlled amounts of filtered and heated air can be supplied

Question 3

An example of visible solid particle contaminants in the air is:

A) Snow
B) Insects
C) Exhaust
D) Bacteria
E) Mist

Answer 3

B) Insects

Question 4

An example of a microscopic solid particle in the air is:

A) Smoke
B) Dust
C) Bacteria
D) Nitrous oxides
E) CFC’s

Answer 4

A) Smoke

Question 5

The activated carbon used for absorbing odours can be sometimes reactivated by:

A) Washing with water
B) Charged with positive ions
C) Heating
D) Cooling
E) Charged with negative ions

Answer 5

C) Heating

Question 6

Ultraviolet light is used to sterilize ____________ in the air.

A) Mists and fogs
B) Bacteria and spores
C) Dust and fibre
D) Lint
E) Fine dust and smoke

Answer 6

B) Bacteria and spores

Question 7

One of the advantages of a common exhaust duct system used for ventilation in a large building is:

A) Power is not required
B) Low maintenance (no fan)
C) High output power
D) Windows can be eliminated
E) Ease of maintenance (only one fan is used)

Answer 7

E) Ease of maintenance (only one fan is used)

Question 8

Electrostatic filters are highly efficient in the removal of:

A) Dust and pollen
B) Bacteria and spores
C) Mists and fogs
D) Fine dust, smoke, and fumes
E) Lint

Answer 8

D) Fine dust, smoke, and fumes

Question 9

Mechanical filters can be divided into two broad classes:

A) Dry and viscous
B) Wet and dry
C) Throwaway and renewable
D) Rotating and stationary
E) Corrugated and smooth

Answer 9

C) Throwaway and renewable

Question 10

Viscous filters are highly efficient in the removal of:

A) Fine dust, fumes, and smoke
B) Dust and pollen
C) Mists and fogs
D) Bacteria and spores
E) Cooking odors

Answer 10

B) Dust and pollen