Unit 22 - Chapter 101

Question 0

Air filters can be divided into two groups

Answer 0

Mechanical and electronic

Question 1

Heat exchangers in gas fired furnaces are made of

Answer 1

Steel

Question 2

Electronic filters will remove

Answer 2

Fine particles from the air

Question 3

The perimeter loop system of furnace dusting is ideal for a building with

Answer 3

No basement

Question 4

Which of the following is a type of outlet in a warm air heating system?

Answer 4

• a grill
• a register
• a ceiling diffuser
• a perforated panel

Question 5

Supply outlets should always be located

Answer 5

To best prevent cold drafts

Question 6

In a warm air heating system, the heated air should enter the rooms preferably via the

Answer 6

Baseboard registers on the outside wall

Question 7

Sleeve bearings on furnace fans require

Answer 7

A few drops of oil every six months

Question 8

Furnace heat exchangers should be checked for corrosion because

Answer 8

carbon monoxide could leak into the building

Question 9

Insufficient heat throughout a building is likely caused by

Answer 9

Insufficient heat input

Question 10

Rooms that are stuffy and dry are NOT created by

Answer 10

• poor air distribution
• a low supply air temperature
• too much ventilation air
• poorly unsalted ducts

Question 11

Electronic air filters use an arrangement of wires charged with ___ volts DC

Answer 11

13,000

Question 12

Electrostatic filters are more efficient than mechanical filters in the removal of

Answer 12

Fine dust, smoke, and fumes

Question 13

Air ducts are made of materials such as

Answer 13

• aluminum
• galvanized sheep metal
• fibreglass

Question 14

The airborne contaminants are removed from the plates of electronic filters by

Answer 14

Washing

Question 15

The plenum temperature in a building heating system should be at least

Answer 15

65’C

Question 16

When fan belts show signs of fraying, cracking, and wear, they should be

Answer 16

Replaced

Question 17

Rooms that are stuffy and dry are created by

Answer 17

Lack of ventilation

Question 18

Furnace heat exchangers should be checked for corrosion because

Answer 18

CO could leak into the building

Question 19

The sealed ball bearings used on a blower in the warm air heating systems

Answer 19

Requires no lubrication

Question 20

Most warm air heating furnaces are equipped with a ___ to supply moisture to the air

Answer 20

Humidifier

Question 21

An electronic filter is also known as

Answer 21

Electrostatic