Excessive vibration of an automatically fired auxiliary boiler can be caused by ()
- Aair or water in the furnace
- Bcombustion pulses
- Cfuel oil pump failure
- Dflame failure
Excessive vibration of an automatically fired auxiliary boiler can be caused by ()
1、An important part of the skill of list
An important part of the skill of listening is being able to predict what the speaker is going to say next.()A正确B错误
2、An indication of an overloaded main pr
An indication of an overloaded main propulsion diesel engine is ()Awhite smoke in the exhaustBhigh exhaust gas pyrometer readingsCsparks in the exhaustDblue smoke in the exhaust
3、Excessive alkalinity of the water in a
Excessive alkalinity of the water in an auxiliary boiler can cause ().Acaustic embrittlement of the boiler metalBacidic corrosion of the boiler metalChard scale deposits on the boiler tubesDetching of the heat exchange surface
4、In the event of failure of an auxiliar
In the event of failure of an auxiliary such as a lubricating pump, the standby pump is started and put on the line automatically“the line”...
5、An illness preferably of an infectious
An illness preferably of an infectious nature seizin more than two persons on board at the same time defines().Adisease of crewBcrew illnessCgroup illnessDmass disease
6、An advantage of an ABC dry chemical ov
An advantage of an ABC dry chemical over a carbon dioxide extinguisher is().Alack of toxicityBthe multipurpose extinguishing abilityCbum-back protectionDcooling ability