The most frequent cause of fires aboard tankers is due to ______．A.Improper gas freeingB.Leaking of cargo pump glandsC.Tobacco smokingD.Spontaneous combustion

The effect that exhaust gas recirculation can reduce NOX formation is partly due to a reduction of the()concentration in the combustion zone and partly due to the content of water and carbon dioxide in the exhaust gas.

A.Oxygen

B.Nitrogen

C.Sulphur

D.Freon

An inert gas system on a tanker should be used to ______.

A.prevent the generation of flammable or combustible gas in tanks

B.blow out cargo lines to prevent the build up of gas concentrations

C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit

D.prevent fires in the pumproom by continually displacing flammable vapors

The most frequent word orders found in languages of the world are SVO, SOV and VSO.()

Which statement about inert gas pressures in a cargo tank is TRUE ________．

A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging

B.Gas pressures should be maintained at the highest permissible level throughout the discharging process

C.High gas pressures may cause pyrophoric oxidation in the tank

D.High gas pressures may cause loss of suction when stripping

Certificate of Fitness for the Carriage of Liquefied Gases in Bulk shall be carried on board by ______．

A.gas carriers constructed on or after 1 July 1986

B.gas carriers constructed before 1 July 1986

C.All chemical tankers

D.oil tankers of 150 gross tonnage and above

The major cause of fuel pump and injection system problems is _____.

A.improper adjustments

B.contaminated fuel

C.kinked fuel lines

D.excessive engine vibration

High concentrations of H2S gas are most dangerous to personnel because they can ______.

A.cause involuntary muscle contractions

B.paralyze your breathing system

C.cause eye inflammation

D.cause dizziness

听力原文：Other aspects of operational risk include major failure of information technology systems or events such as major fires or other disasters.

(6)

A．Information technology system can cause operational risk.

B．A major fire can be a cause of operational risk.

C．The most important types of operational risk involve breakdowns in internal controls and corporate governance.

D．Other aspects of operational risk include firing its dealers, lending officers or other staff exceeding their authority or conducting business in an unethical or risky manner.

The blowers of an inert gas generation system aboard a tanker，will be automatically secured if ______．

A.Normal water supply at the water seal is lost

B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉

C.The cooling water supply to the scrubbers is lost

D.All of the above

Which statement is TRUE concerning inert gas systems on tankers ________．

A.Flue gases from the ship's boilers are used in some systems

B.The gas is helium

C.Using the system accelerates the rusting of the tanks

D.All of the above