EFFICIENT GF FA HEATING SYSTEMS (030203d)

Question 1

What is Flame Rectification

Answer 1

When a flame acts as an electrical conductor.

Current can flow through a flame between two points of electrical potential difference.

Question 2

The combustion air-prove switch is usually what type?

Answer 2

SPST

Question 3

What is used to ignite the fuel in a mid-efficiency system?

Answer 3

Spark igniter

Question 4

How many roll-out switches are used in a domestic furnace?

Answer 4

2

Question 5

What voltage is supplied to the thermostat?

Answer 5

24V

Question 6

What is the AFUE rating for a high-efficiency furnace?

Answer 6

90-98%

AFUE (Annual Fuel Utilization Efficiency)

Question 7

What is the temperature range set point for a high limit switch?

Answer 7

82 - 94 degrees C

Question 8

Which component of a mid-efficiency furnace moves air/flue gases through the heat exchanger?

Answer 8

The combustion air blower

Question 9

What is the AFUE rating for a mid-efficiency furnace?

Answer 9

80-83%

Question 10

A high-efficiency filter in a furnace traps what?

Answer 10

Particles as small as 1 micron

Question 11

A mid-efficiency filter does what?

Answer 11

Traps and holds small particles

Question 12

What does an electrostatic filter remove?

Answer 12

Microscopic particles

Question 13

In an electronic air filter, what charge do smaller particles receive?

Answer 13

Positive

Question 14

What is the purpose of a micro-biocide treated filter?

Answer 14

Inhibits the growth of micro-organisms

Question 15

What percentage of air inside the home should be replace every hour?

Answer 15

35%