正确答案: C

①②③

题目：矿物油可选用混合液来清洗。①乳化剂;②表面活性剂;③合成肥皂液

解析：C

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举一反三的答案和解析：

[单选题]Which of the following is NOT mentioned in this passage?

Bursting caps must be fitted

[单选题]废气锅炉如水位不变，其蒸发量主要取决于主机的()。

排气温度和排气量

[单选题]可疑脊柱外伤病员，正确搬运的是()

三人以上平托放于木板上搬运

[单选题]舵工操舵时，当船长、值班驾驶员和引航员同时在驾驶台时，应以()的舵令为准。

船长

[单选题]"ERIKA"油船在法国西海岸发生重大油污事故后，IMO迅速果断地对MARPOL73/78附则Ⅰ第13G条再次作出修正;并引入______。

CAS

[单选题]第二组Under normal operation, some lubrication oil mist may be discharged from the air compressor to the air start system. This oil may be from excess compressor cylinder lubrication, from faulty oil scraper rings, or may even be suspended oil vapor contaminating the engine room atmosphere and drawn in at the compressor suction. Oil discharge is kept to a minimum by draining the after cooler, air receiver and starting system. If small quantities of lubrication oil do get passed into the starting air system, they will deposit as thin moist film over internal pipe surfaces but are not readily combustible. If a cylinder non-return valve leak while the engine is in operation, some hot gas, possibly with unburned fuel and cylinder lubrication oil, may be blown through the valve to the adjacent air manifold. With further heating from the leaky valve, this, together with the already deposited oil film, will carbonize and form. incandescent carbon. If starting air is applied to the system while still hot, the high pressure air coming into contact with the burning carbon may cause an explosion. Such an explosion will cause a flame to pass back through the air start pipe system, evaporating the deposited oil film and igniting it in the presence of air. Very high velocities and shockwaves are generated which may rupture pipes and fittings.

the danger of explosion in the starting air system