Unit 22 - Chapter 102

Question 0

Ventilation can be divided into two methods

Answer 0

Mechanical and natural

Question 1

Actual ventilation rates may vary per person from

Answer 1

0.14 to 1.5 cubic meters per minute

Question 2

Natural ventilation is improved by the used of a roof

Answer 2

Ventilator

Question 3

Mechanical ventilation can be divided into which types?

Answer 3

Mechanical air intake, natural exhaust

Question 4

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

Answer 4

Slightly above atmospheric pressure

Question 5

Living organisms that must be removed from the air are

Answer 5

Bacteria and spores

Question 6

Mechanic filters can be divided into two broad classes

Answer 6

Throwaway and removable

Question 7

Viscous filters are highly efficient in the removal of

Answer 7

Dust and pollen

Question 8

Electrostatic filters are highly efficient in the removal of

Answer 8

Fine dust, smoke, and fumes

Question 9

Ultraviolet light is used to remove ___ from the air

Answer 9

Bacteria and spores

Question 10

The air velocity though a viscous filter can be ___ higher than with dry filters

Answer 10

2.5 m/s

Question 11

The carbon in an odour absorber may be reactivated by heating it to ___ to drive out the absorbed gases

Answer 11

538’C

Question 12

The best filters available for ventilation system lint removal are

Answer 12

Dry

Question 13

What precaution must be taken when using ultraviolet lights to sterilize air in ventilation systems?

Answer 13

Position the lamps so UV rays cannot strike occupants

Question 14

The activated carbon used for absorbing odours can often be reactivated by

Answer 14

Heating

Question 15

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

Answer 15

Only one fan to maintain

Question 16

Ultraviolet light is used to remove ___ from the air

Answer 16

Bacteria and spores

Question 17

The advantage of a mechanical ventilation system is

Answer 17

The system supplies a controlled amount of filtered and heated air

Question 18

Viscous filters are highly efficient in the removal of

Answer 18

Dust and pollen

Question 19

Which air cleaning device can be used for the removal of gases and vapour?

Answer 19

Charcoal absorbers

Question 20

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

Answer 20

Natural ventilation

Question 21

Activated carbon will absorb odours up to ___ of its own weight

Answer 21

20%

Question 22

Electronic air cleaners are divided into

Answer 22

Electrostatic precipitators and charged media