单项选择题
A.relight the boiler immediately to prevent loss of steam pressure
B.relight the fire off the brickwork as the bricks are cherry red
C.purge the furnace of any combustible gases before attempting to relight the fire
D.speed up the feed pump to prevent dry firing when the burner flame is reestablished
单项选择题 The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner（）
单项选择题 Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）
单项选择题 Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?（）