What is the most readily discernible indication of firing with insufficient _________secondary air?

Quesiton : What is the most readily discernible indication of firing with insufficient _________secondary air?

Answer: black smoke coming from the stack

What is the most readily discernible indication of firing with insufficient _________secondary air? Practice Test #1. black seal certification. STUDY. PLAY. ... What is the most readily discernible indication of firing with insufficient _____secondary air ? black smoke coming from the stack. How do you clean new or re-tubed boilers? Use and alkaline detergent solution. The most accurate means of deciding the frequency of blowdown of a boiler is determined by a _____. Furnaces need both combustion air and dilution air. The requirements are about 15 cubic feet of combustion air and 15 cubic feet of dilution air for every cubic foot of gas burned. Since a cubic foot of natural gas contains about one thousand BTUs a furnace that fires at the rate of 120 000 BTUs per hour would use 120 cubic feet of gas if it fired … What is the most readily discernible indication of firing with insufficient secondary air ? Black smoke coming from the stack How do you clean new or re-tubed boilers? Comparison Of Combustion Performance Between Natural Gas And Medium Fuel Oil At Different Firing Settings For Industrial Boilers W.M. W.A. Najmi * and A.M. Arhosazani Faculty of Mechanical Engineering University of Technology MARA Malaysia *wanjerm3