单项选择题
The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.
A.filter
B.hole
C.pollution
D.content
点击查看答案&解析
相关考题
-
单项选择题
The internal part of boiler should be cleaned by yard if found （）.
A.scaled
B.worn
C.deformed
D.rested -
单项选择题
At normal sea going, we use （） instead of donkey boiler.
A.a heater
B.a pre-heater
C.an exhaust gas boiler
D.the coal burning boiler -
单项选择题
The soot blowers are operating in the oil fuel boiler the air/fuel ratio must （） throughout the action, and blowers greased after use.
A.be increased
B.be decreased
C.remain constant
D.either be increased or remain constant
