单项选择题
A.casting interlocking components B.welding plates to form sections for assembly C.forging integral components D.case hardening integral components
Prior to lighting off a cold automatically fired auxili...
单项选择题Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.
A.check and regulate the water level B.close the air cock once fires are lit C.blowdown the gage glass D.crack the steam stop to assure protective steam flow
Which of the following statements describes the functio...
单项选择题Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）
A.Maintains a constant head on the system B.Reduces the likelihood of air or steam pockets formation C.Provides a low pressure point for the addition of makeup cooling water D.All of the above
To minimize corrosion, fuel oil strainer disks, spacers...
单项选择题To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of （）.
A.brass B.copper C.iron D.monel metal or stainless steel
