A. a burned out solenoid in the oil supply valve
B. high temperature excess air
C. incorrectly setting the hot-well dump valve
D. an incorrectly positioned burner snubber realy
[单选题]The water in an auxiliary boiler should be tested for chloride content to determine ( ).A．total dissolved solidsB．salt contaminationC．water harcnessD．chlorine contamination
[单选题]When an auxiliary boiler is panting and emitting black smoke, you should （）.A . increase the fuel oil temperatureB . decrease the fuel oil temperatureC . decrease the fuel oil supply pressureD . increase the air supply
[单选题]The water in an auxiliary boiler should be tested for chloride content to determine （）.A . total dissolved solidsB . salt contaminationC . water hardnessD . chlorine contaminatio
[单选题]If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause maybe （）.A . high steam pressure in the boilerB . abnormally high feed water temperatureC . abnormally high boiler water temperatureD . steam demand exc
[单选题]In an auxiliary boiler steam and water system, the highest pressure will be in the （）.A . steam stop valveB . dry pipeC . feedwater systemD . generating tube
[单选题]Before an auxiliary boiler is shutdown for an extended period of time, the water in the boiler should have a pH value of （）.A . 10B . 7C . 4D . 1
A distorted furnace in a fire-tube auxiliary boiler may be the result of （）A. fi
[单选题]Failure to provide _____ explanations for his frequent blunders, this young
[单选题]British Prime Minister Tony Blair promised the electorate that guns would n
[单选题]Although the three workers got very tired in repairing the boiler， ( )them