Before starting an oil furnace, the technician should check to ...

[clippers!]

Before starting an oil furnace, the technician should check to see that:
 
  A) The flame-observation door is open for viewing.
  B) The clean-out doors are open to allow unwanted debris to be blown out during ignition.
  C) The flame-observation door and all clean-outs are closed.
  D) The flame-observation door and all clean-outs are open.

Question 2

Round sheet metal ductwork should be:
 
  A) Fastened with sheet metal screws and sealed with mastic.
  B) Fastened with duct tape and sealed with mastic.
  C) Fastened and sealed with mastic.
  D) Fastened and sealed with duct tape.

[morrie123456]

Answer to Question 1

C

Answer to Question 2

A

[clippers!]

TYSM

[laurnthompson]

Thanks for the timely response, appreciate it