Mechanical filters can be divided into two broad classes:

Mechanical filters can be divided into two broad classes:

a) wet and dry
b) rotating and stationary
c) dry and viscous
d) corrugated and smooth
e) throwaway and renewable





Answer: E

Natural ventilation is improved by the use of a roof

Natural ventilation is improved by the use of a roof

a) ventilator
b) radiator
c) grille
d) louver
e) panel





Answer: A

Electronic air cleaners are divided into ____________ air cleaners.

Electronic air cleaners are divided into ____________ air cleaners. 

a. Commercial and residential
b. impingement and non-impingement
c. High voltage and low voltage
d. Electrostatic precipitators and charged media
e. AC and DC




Answer: D

Which one of the following air cleaning devices can be used for the removal of gases and vapour?

Which one of the following air cleaning devices can be used for the removal of gases and vapour?

a. Dry filters
b. Air washers
c. Electronic air cleaners
d. Charcoal absorbers
e. Air sterilizers




Answer: D

Actual ventilation rates may vary per person from:

Actual ventilation rates may vary per person from:

a. 0.5 m3/sec to 0.6 m3/sec
b. 0.5 m3/min to 0.75 m3/min
c. 0.2 m3/m to 1.2 m3/min
d. 0.14 m3/min to 1.5 m3/min
e. 1.0 m3/hour to 1.5 m3/hour




Answer: D

Which of the following Is not an airborne contaminant?

Which of the following Is not an airborne contaminant?

a. Dust
b. Smoke
c. Fumes
d. Pollen
e. Moisture





Answer: E

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

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

a. Well below atmospheric pressure
b. Slightly below atmospheric pressure
c. At atmospheric pressure
d. Slightly above atmospheric pressure
e. Well above atmospheric pressure



Answer: D

Ultraviolet light is used to remove _____ from the air.

Ultraviolet light is used to remove _____ from the air.

a. Dust and pollen
b. Fine dust and smoke
c. Bacteria and spores
d. Mists and fogs
e. Lint





Answer: C

In the past the most popular method used to provide ventilation in a residence or small building has been by:

In the past the most popular method used to provide ventilation in a residence or small building has been by:

a. Mechanical ventilation
b. Natural ventilation
c. Forced air
d. Convection
e. Unit ventilator




Answer: B

Viscous filters are highly efficient in the removal of:

Viscous filters are highly efficient in the removal of:

a. Fine dust, fumes, and smoke
b. Bacteria and spores
c. Cooking odours
d. Dust and pollen
e. Mists and fogs




Answer: D

Proper ventilation makes a building comfortable and habitable for its occupants. Which of the following is NOT a function of effective ventilation?

Proper ventilation makes a building comfortable and habitable for its occupants. Which of the following is NOT a function of effective ventilation?

a. to provide fresh air
b. to remove smoke from the air
c. to prevent condensation on the walls
d. to create air circulation
e. to increase the humidity of the air




Answer: E

Electrostatic filters are highly efficient in the removal of:

Electrostatic filters are highly efficient in the removal of:

a. Odours
b. Fine dust, smoke, and fumes
c. Bacteria and spores
d. Lint
e. Mists and fogs





Answer: B

The advantage of a mechanical ventilation system is:

The advantage of a mechanical ventilation system is:

a. The system is self powered
b. The system supplies a controlled amount of filtered and heated air.
c. The entire system only requires one fan.
d. It stratifies the air, to help with filtration
e. There are no ducts required




Answer: B

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

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

a. No fan to maintain
b. The building can be maintained at a slight negative pressure at all times.
c. Only one fan to maintain
d. Windows can be eliminated
e. No power is required




Answer: C

Activated carbon will absorb odours and objectionable gases by up to _____ of its own weight before requiring replacement.

Activated carbon will absorb odours and objectionable gases by up to _____ of its own weight before requiring replacement.

a. 10%
b. 20%
c. 30%
d. 40%
e. 50%



Answer: B

The activated carbon used for absorbing odours can often be reactivated

The activated carbon used for absorbing odours can often be reactivated

a. by heating it
b. by cooling it
c. by exposing it to a DC current
d. with chlorine bleach
e. by soaking it in water



Answer: A