英语2期末考

To avoid excessive surge pressure when bunkering, you should(　　) Abunker at a normal rate Bcheck for kinks in hose Cclose valves slowly Dshut valves before topping off

severe electrical storm;2,fire on the pier; 3,fire on the ship A1 B3 C2 3 D1 2 3

A batten down the engine room B start the fire pump C apply carbon dioxide to the fire D shut off the fuel supply

The fuel oils used in today's diesel engines are produced from(　　) Aheavy fuel oil Bcrude oil sources Cdiesel oil Dbunker fuel oil

Acurrent Bvoltage Cpower Dresistance

The main purpose of an electric space heater installed in a large AC generator is to(　　) Aprevent the windings from becoming brittle Bprevent moisture from condensing in the windings during shutdown Cprevent acidic pitting of the slip rings Dkeep the lube oil warm for quick starting

Which of the following materials is a good insulator?(　　) ASteel. BAluminum CGlass. DCopper.

Before any work on electrical of electronic equipment is performed, which of the follow precautions should be carried out?(　　) ADe-energize the applicable switchboard bus. BBypass the interlocks. CSecure and tag the supply circuit breaker in the open position. DStation a man at the circuit supply switch.

If a small electric motor is immersed in salt water it should be(　　) 1,Washed with fresh water; 2,dried in an oven Aonly 1 Bonly 2 Cboth 1 and 2 Dneither 1 or 2

(　　)is the breakdown of surface tension between oil droplets in an oil/ water mixture which cause them to join and increase in size. ACoarse flitting BFine separating CMixing DCoalescence

The opening of the humidifier' s valve of air-conditioner should be(　　)when the circumstance temperature is lower than 0 °C. Adecreased Bincreased Cfixed Dclosed

The process of adding moisture to air to increase the relative humidity is known as(　　) Asublimation Bdesiccation Chumidification Dmoisturization

When started, a complete oily water separating unit is first filled (　　).The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment. Awith dirty water B, with clean water Cby oily water Dby mixed water

Because the flow rate of supply water pump is too large, oily water separator does not work well. Which of the following is not the reason?(　　) AThe monitoring equipment is out of order. BSeparating effect becomes bad. CSeparating effect becomes bad and inner wall is contaminated. DInner wall is contaminated.

Oily water separator mis-alarms, the most possible reason is(　　) Aseparating oil too fast B15 ppm monitor out of function Cthe discharge solenoid valve out of order Dlow heating temperature

The time of discharging oil is short, and oily water separator discharges oil frequently. The possible reason is(　　) Athe sensor of low oil level is fully covered by sludge oil Bthe coarse strainer before the pump in suction system is clogged Cthe screw pump is worn seriously and volumetric efficiency is decreased Dbilge suction valve is clogged

If separating effect of the oily water separator is not good, we can improve it by(　　) Aflushing separator with cold water Bincreasing bilge water supply flow Cheating oily water properly Dopening manual oil discharge valve

Which of the following is wrong about operation of oily water separator?(　　) ATo filled with clean water before operation. BTo keep air cushion in oil collecting space during running. CTo check oil level during running. DTo clean inner separator with low pressure steam.