Most boilers control systems have built-in __ combustion controls to make certain the air flow and fuel flow rates are properly matched.
A. Boiling out
B. Flow
C. Cutting
D. Pressure
E. Cross-limiting
Answer: E
Most boilers control systems have built-in __ combustion controls to make certain the air flow and fuel flow rates are properly matched.
A. Boiling out
B. Flow
C. Cutting
D. Pressure
E. Cross-limiting
Answer: E