Chapter 34 Ventilation & Air Filters

Question 1

living organisms that must be removed from the air are:

a) Insects and pollen
b) Bacteria and insects
c) Bacteria and spores
d) Pollen and spores

Answer 1

c) Bacteria and spores

Question 2

The air velocity through a viscous filter can be ________ higher than with dry filters.

a) 2.5 m/s (500 ft/min)
b) 4.0 m/s (800 ft/min)
c) 4.5 m/s (900 ft/min)
d) 7.5 m/s (1500 ft/min)

Answer 2

a) 2.5 m/s (500 ft/min)

Question 3

The carbon in an odour adsorber may be reactivated by heating it to ________ to drive out the adsorbed gases.

a) 250 C (480 F)
b) 538 C (1000 F)
c) 425 C (800 F)
d) 175 C (350 F)

Answer 3

b) 538 C (1000 F)

Question 4

The best filters available for ventilation system lint removal are:

a) Charged-media electronic
b) Dry
c) Viscous impingement
d) Activated alumina chemisorbant

Answer 4

b) Dry

Question 5

What precaution must be provided when using ultraviolet lighting for sterilizing air in ventilation systems?

a) Correct supply voltage
b) Safety glasses
c) Sufficient number of units
d) Positioning the lamps so they cannot hit occupants

Answer 5

d) Positioning the lamps so they cannot hit occupants