Chapter 101

Question 0

Electrostatic filters are more efficient than mechanical filters in the removal of:
A) dust and pollen
B) fine dust, smoke, and fumes
C) bacteria and spores
D) lint

Answer 0

B) fine dust, smoke, and fumes

Question 1

Electronic air filters use an arrangement of wires charged with \_\_\_\_\_ volts DC.
A) 13000
B) 5000
C) 10000
D) 7500

Answer 1

A) 13000

Question 2

Are ducts are made of materials such as:
A) aluminium
B) galvanized sheet metal
C) fibreglass
D) all of the above

Answer 2

D) all of the above

Question 3

The airborne contaminants are removed from the plates of electronic filters by:
A) reversing of the direction of air through the filter
B) washing
C) periodic replacement of the filters
D) blast of high pressure air

Answer 3

B) washing

Question 4

The plenum temperature in a building heating system should be at least:
A) 50*C
B) 38*C
C) 100*C
D) 65*C

Answer 4

D) 65*C