15 Questions
What should be visually checked to ensure complete combustion in the boiler?
The color of the flame
What should be monitored to ensure that the circulating pump is operating within the expected range?
Discharge pressure, suction pressure, and differential pressure
What is the expected color of a typical natural gas flame in the boiler?
Blue with orange at the tip of the flame
What is the purpose of checking the stuffing boxes or mechanical seals of circulating pumps?
To ensure the proper amount of leakage
What should be done to circulating pumps with mechanical seals that show signs of leakage?
They should not show any signs of leakage
What is the maximum operating temperature for boiler water in hot water heating systems?
120°C
What should be the normal boiler operating pressure compared to the safety relief valve setting to prevent weeping and protect the safety relief valve?
25% less
What indicates that the boiler pressure is greater than the minimum required to keep the heating system full?
Movable hand (actual system pressure) above the stationary hand (full system pressure)
What should be checked to ensure water level maintenance in a steam boiler?
Water level controls, indicators, and recorders
What should be visually checked to evaluate whether the burner is operating properly in a steam boiler?
Flame diffusers
What is the purpose of a high steam pressure cut-off in power boilers?
To prevent the boiler pressure from exceeding the maximum allowable working pressure
How should the high-pressure cut-off be set in relation to the safety valve set point and blowdown?
No greater than the lowest safety valve set point, minus the safety valve blowdown
When should the stack temperature be monitored and recorded in a power boiler?
Once the boiler has completely warmed up and is at normal operating pressure
What may rising stack temperatures, at a given firing rate, indicate in a power boiler?
Heat transfer surfaces are becoming dirty
What should be observed once the boiler has been fired to ensure proper operation?
The steam pressure reaches the desired set point and does not increase further
Test your knowledge on inspecting boiler operating parameters including routine instrument checks, heating system checks, and auxiliary system checks. This quiz covers topics such as checking circulating pumps, stuffing boxes, and mechanical seals.
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