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Author Question: What happens first when there is a call-for-heat signal to a furnace equipped with a motor-driven ... (Read 58 times)

amal

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on: Jul 24, 2018
What happens first when there is a call-for-heat signal to a furnace equipped with a motor-driven vent
  damper?
 
  a. The burners light to warm a bi-metal element.
  b. A switch in the damper closes to start the burner.
  c. A motor opens the vent damper.
  d. The burners light to start the motor.

Question 2

The National Fuel Gas Code category of vent system used with a natural draft furnace is _____.
 
  a. Category I
  b. Category II
  c. Category III
  d. Category IV


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amy.lauersdorf90

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Reply #1 on: Jul 24, 2018
Answer to Question 1

c

Answer to Question 2

a


amal

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Reply 2 on: Jul 24, 2018
:D TYSM

frankwu0507

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Reply 3 on: Yesterday
Gracias!

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