During the PSC inspection, under the provision of SOLAS74, which one may not be regarded as clear grounds for ships' detainment？
A. excess amount of oily-water mixtures in bilges
B. insulation of piping including exhaust pipes in engine room contaminated by oil
C. improper operation of bilge pumping arrangements
D. paint peeling off the uptake
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Which of the following represents the significance the fuel oil cetane number？
A. The cetane number has no affect on injection lag
B. The cetane number is an indication of the fuel's viscosity
C. Ignition lag is reduced with fuels having a high cetane number
D. The cetane number is of little significance in the combustion process
Air trapped in the hydraulic fluid of a steering system may be indicated by
A. the steering pumps overspeeding
B. a jammed open relief valve
C. a constantly occurring improper rudder response
D. excessive ram pressure
某银行出售了100美元债券，得到了100美元现金。同时该银行还贷出了50美元，借款人提现了该笔贷款。同时该银行还接受了一笔60美元的现金存款。 a．以上这些活动都结束之后，该银行的准备金会发生什么变化？ b．该银行的存款会发生什么变化？
Biological treatment may use __ to treat sewage (1)living organisms (2)chemicals (3)additives
A. (1)
B. (2)
C. (3)
D. (1)(2)(3)
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