Boilers Test Predictions Exam Questions 2024.

Boilers Test Predictions Exam Questions 2024. Boiler Water Level - correct answer the first duty when taking over a boiler room shift is to make certain the pipe, fittings and valves between the water glass and the boiler are free and open by boiling down the water column and water glass and noting the promptness of the return of water to the glass. The Most Important Rule - correct answer the most important rule for the safe operations of boilers is to maintain the proper water level at all times and as constant level as conditions will permit. If the water is not visible shut the boiler down. Low Water and Feed Water Controls - correct answer the low water cutoff is the most important electrical/mechanical device on your boiler for maintaining a safe water level. If a low water condition develops it could result in an overheating and explosion. The low water cutoff should be tested at least weekly. Low Water Cutoff, Evaporation Test (Steam Boiler) - correct answer While the boiler is in operation, shut of the feedwater pump and monitor the boiler level. The low water cutoff should shut down the burner before the water level goes out of sight low; if the burner does not shut off, restart the feedwater pump before the water level goes out of sight low and immediately shoot the low water cutoff to determine the cause of failure. The boiler must be under constant attendance by a properly licensed engineer at all times during this test. Low Water Cutoff, Slow Drain Test (Steam Boiler) - correct answer While the boiler is in operation, shut off the feedwater pump and slowly open the bottom blow valve to drain the water from the boiler. The low water cutoff should shut down the burner before the water level goes out of sight low; if the burner does not shut off. restart the feedwater pump before the water level goes out of sight and immediately troubleshoot the low water cutoff to determine the cause of failure. The boiler must be under constant attendance by a properly licensed engineer at all times during this test. Firing - correct answer Aside from the standpoint of the economy, maintain the fire as uniformly as possible to avoid an excessive rate of combustion, undesirable variations in temperature and possible explosions. The destructive force in a boiler explosion is cause by the instant release of energy stored in the water as heat.