Gas Equipment & Large Boiler 248 CMR 7.00

Question 1

Burner assemblies and all component parts shall be installed according to the ______.

Answer 1

manufacturers instructions and shall be properly and firmly secured in place to maintain correct alignment in normal use.

Question 2

Linkage for controlling air and gas input rates are designed to ______.

Answer 2

reliably maintain correct air-gas ratio.

Question 3

When shall combustion control be provided?

Answer 3

for burners with a firing rate of 2,500,000 BTUs per combustion chamber per hour and over

Question 4

Gas main pressure regulators and gas pressure interlocks. Each burner assembly shall be equipped with a ___(A)___ main gas pressure regulator that will regulate within ___(B)___.

Answer 4

(A) listed
(B) plus or minus 10% of the operating pressure at all firing rates.

Question 5

Vent lines from main gas pressure regulators shall not be connected into a ___(A)___ with the bleed line from gas operated ___(B)___.

Answer 5

(A) common line
(B) diaphragm valves or from pressure relief valves

Question 6

vent lines shall be run to the outside using ___(A)___ and shall not be ___(B)___.

Answer 6

(A) shortest practical route
(B) trapped or installed in a manner that restricts air flow

Question 7

Name 3 things for pilot testing.

Answer 7

1.) pilot burner shall be lighted and adjusted to manufacturers instructions
2.) pilots shall not deposit carbon
3.) when bleed pilots are used the discharge shall be in a fixed position