87. The fresh water operates with a vacuum of to evaporate at a temperature of 40~50℃. A. 60%~70% B. 40%~50% C. 90%~95%
allowing the brine
D. 20%~30%
注:造水机在 90%~95%真空下运行可使海水在 40~50℃时蒸发,选 C。
  88. The fresh water produced in the fresh water generator is delivered to a tank by a . A. fresh water ejector C. separately installed fresh water pump B. built-in fresh water pump D. combined brine/air ejector
注:通过单独安装的淡水泵将造水机所造出的淡水输送到淡水舱,选 C。
  89. The vapor generated in the evaporator passes through fresh water generator. A. the condenser only B. the demister and condenser C. the demister only D. the evaporator only in the
注:蒸发器中产生的水蒸气将通过造水机中的汽水分离器和冷凝器,选 B。
  90. Having reached the boiling temperature, the feed-water undergoes in the fresh water generator. A. total evaporation total condensation B. partial evaporation C. partial condensation D.
注:一旦达到沸点温度,造水机中的给水将经历部分蒸发,选 B。
  91. The used in the fresh water generator extracts the produced fresh water from the condenser and pumps the water to the fresh water tank. A. distillate pump salinometer B. ejector pump C. combined brine/air ejector D.
注:造水机中的凝水泵从冷凝器中抽出所造的淡水,并将水泵到淡水舱,选 A。
  92. The used in the fresh water generator continuously checks the salinity of the produced water. A. distillate pump B. ejector pump ejector D.salinometer C. combined brine/air
注:造水机中的盐度计连续地检测所产淡水的盐度,选 D。
  93. The used in the fresh water generator extracts brine and non-condensable gases from the separator vessel, thus creating and maintaining a vacuum within the evaporator. A. distillate pump B. ejector pump C. combined brine/air ejector D. salinometer 注:造水机中的组合式海水/空气喷射器抽吸分离室中的盐水和不凝性气体,产 生并维持蒸发器内的真空,选 C。
  94. The used in the fresh water generator is a single-stage centrifugal pump which supplies the condenser with sea water and the brine/air ejector with jet water as well as feed water for evaporation.
A. distillate pump salinometer
B. feeding pump
C. combined brine/air ejector
D.
注:造水机的给水泵是一台单级离心泵,它供给冷凝器海水,给海水/空气喷射 器提供喷射水,并为蒸发提供给水,选 B。
  95. Which of the following sequence is correct relative to distillation plant stopping procedures? (I) Open the air screw on the plant; (II) Stop the ejector pump; (III) Stop the freshwater pump; (IV) Stop the hot water supply to the unit. A. (III), (II), (I), (IV). C. (IV), (I), (III), (II). B. (I), (III), (IV), (II). D. (IV), (III), (II), (I).
注:关于造水机停用的步骤,正确的顺序是:停止供给装置加热水;停淡水泵; 停喷射泵;打开造水机的放气阀,选 D。
  96. Which of the following sequence is correct relative to distillation plant starting procedures? (I) close the air screw on the plant and allow water to flow through the condenser; (II) Start the freshwater/distillate pump; (III) Supply hot water to the plant; (IV) Switch on the salinometer; (V) Start the eject pump and create a vacuum of at least 90%. A. (III), (II), (I), (IV), (V). B. (I), (V), (III), (IV), (II).
C. (IV), (I), (III), (II), (V).
D.(V), (IV), (III), (II), (I).
注:关于造水机启动的步骤,正确的顺序是:关闭造水机的放气阀并让水流过冷 凝器;启动喷射泵并产生至少 90%的真空;给装置提供加热水;合上盐度计的开 关;启动淡水/凝水泵,选 B。

  97. When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water . A. to decrease scale formation C. for more economical purpose B. for better cooling effect D. to raise vacuum
注:当蒸馏海水时,蒸馏器排出的冷却水返回蒸发器作为给水,其目的是为了提 高经济性,选 C。
  98. When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water . A. to cut down the amount of cooling water needed B. to prevent an excess amount of cooling water from being discharged to the bilges C. to supply hot water to the evaporator for more economical operation D. None of the above is true. 注:当蒸馏海水时,蒸馏器排出的冷却水返回蒸发器作为给水,其目的是为了向 蒸发器提供温度高的加热水,提高运行的经济性,选 C。
  99. Condensate formed within the first-effect tube nest of a double-effect, low pressure evaporator, is removed by a . A. series of baffles drain pump B. crossover pipe C. condensate separator D.
注:在两级低压造水机中,第一级管子形成的凝水由排液泵排出,选 D。 1
  00. Check valve is not used to control .
A. direction of oil flow C. bypass of filter
B. back pressure of return oil D. high pressure overflow
注:单向阀不用于控制高压溢流,故选 D。 1
  01. The symbol(GB7
  86.1-
  93) at right side represents A. four-position three-way directional control valve B. three-position four-way directional control valve C. three-position three-way directional control valve D. four-position four-way directional control valve 注:右图中的符号代表三位四通方向控制阀,选 B。 1
  02. The are used to control the flow rate by changing the orifice flow area (hydraulic resistance). A. pressure control valves C. directional control valves B. flow control valves D. filters .
注:流量控制阀是通过改变节流口通流面积(即液阻)来控制流量的,选 B。
1
  03. Which of the following valves is not belong to the pressure valves? A. relief valves C. sequence valves B. reducing valves D. restrictor
注:节流阀不属于压力控制阀,选 D。 1
  04. may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height). A. A capstan drum B. A hold C. A warp end D. A mooring
注:吊杆式起货机装有卷缆端,用来操作吊杆的顶牵索(调节吊杆的高度),选 C。
1
  05. Which problems can occur if the brake band lining of a windlass brake becomes excessively worn? A. The driving engine will over-speed. immediately drop. C. The clutch will overheat. will be reduced. B. The anchor will
D. The brake’s effectiveness
注:如果起锚机的刹车带衬片过度磨损,刹车的效果将会降低,选 D。 1
  06. The is used for hauling in or letting out the wires or ropes. A. windlass winch barrel B. anchor capstan C. turning gear D.
注:绞缆卷筒用于收进或放出缆绳,选 D。 1
  07. These include deck machinery such as mooring equipment, cranes and .
A. neutral
B. end
C. OPENING
d. closure
注:液压泵运行之前,应仔细检查系统,确保控制阀杆处在中间位置,选 A。 1
  08. Auxiliary components for hydraulic systems include , filters, reservoirs, heat exchangers, seals, pressure gauges and so on. A. accumulators B. hydraulic pumps C. hydraulic actuators D. hydraulic control valves 注:液压辅件主要包括蓄能器、过滤器、油箱、热交换器、密封装置、压力表等, 选 A。 1
  09. Auxiliary components for hydraulic systems include accumulators, , reservoirs, heat exchangers, seals, pressure gauges and so on. A. hydraulic pumps B. filters C. hydraulic actuators D. hydraulic control valves
注:液压辅件主要包括蓄能器、过滤器、油箱、热交换器、密封装置、压力表等, 选 B。
1
  10. Auxiliary components for hydraulic systems include accumulators, filters, , heat exchangers, seals, pressure gauges and so on. A. hydraulic actuators C. reservoirs B. hydraulic pumps D. hydraulic control valves
注:液压辅件主要包括蓄能器、过滤器、油箱、热交换器、密封装置、压力表等, 选 C。
1
  11. Auxiliary components for hydraulic systems include accumulators, filters, reservoirs, , seals, pressure gauges and so on.
A. hydraulic control valves C. hydraulic actuators
B. hydraulic pumps D. heat exchangers
注:液压辅件主要包括蓄能器、过滤器、油箱、热交换器、密封装置、压力表等, 选 D。 1
  12. Which of the following is not the advantage of hydraulic transmission? A. A hydraulic system can produce higher power than electrical equipment under the same volume. B. Hydraulic equipment has a good working stability. C. The hydraulic transmission can reach a wide range of speed regulation (with the range of 1:20
  00), and the speed can also be regulated during the work processing. D. The hydraulic transmission cannot easily realize automation and the pressure, flow rate and the flow direction can be regulated and controlled. 注:液压传动易于实现自动化,对压力、流量和流动方向可以进行调节和控制, 选 D。 1
  13. Which of the following is not the advantage of hydraulic transmission?
A. The hydraulic transmission can easily realize automation and the pressure, flow rate and the flow direction can be regulated and controlled.
B. The hydraulic system cannot protect from over-load easily, which can be done by electricity or machine equipment. C. Hydraulic equipment has a good working stability. D. A hydraulic system can produce higher power than electrical equipment under the same volume. 注:液压传动易于实现过载保护,选 B。 1
  14. Which of the following is not the advantage of hydraulic transmission? A. More energy loss exists in a hydraulic transmission because of the oil leaks in hydraulic system. B. Hydraulic equipment has a good working stability. C. A hydraulic system can produce higher power than electrical equipment under the same volume. D. The hydraulic system can protect from over-load easily, which can be done by electricity or machine equipment. 注:由于液压系统中液压油的泄漏,使得液压传动有更多的能量损失,选 A。 1
  15. Which of the following is not the advantage of hydraulic transmission? A. A hydraulic system can produce higher power than electrical equipment under the same volume.
B. The hydraulic transmission can easily realize automation and the pressure, flow rate and the flow direction can be regulated and controlled. C. Hydraulic equipment has a good working stability.
D. The working temperature has strong effect on the working property of a hydraulic system because of the viscosity-temperature character of hydraulic oil. 注:由于液压油的粘温特性,液压系统的工作性能易受温度变化的影响,选 D。 1
  16. With a load the voltage and current are in phase.
A. purely resistance B. capacitive C. inductive D. None of the above. 注:对于纯电阻负荷,电压和电流同相,选 A。 1
  17. The star formation is most commonly used and requires on the alternator. A. one slip-ring B. two sliprings C. three sliprings D. four sliprings 注:最通常采用星形连接,发电机上需要四个滑环,选 D。 1
  18. Voltage generated by most AC generators is fed from the machine to the bus by means of. A. brushes on a commutator C. slip rings on a commutator B. brushes on slip rings D. direct connections from the stator
注:大多数交流发电机产生的电压都是通过定子的直接连接,从发电机输送到汇 流排,选 D。 1
  19. Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will . A. result in immediate power outages C. appear on the ground detection system cause outages B. damage circuit breakers D. damage insulation and may
注:船舶电力系统偶然接地应尽早排除,因为接地会损坏绝缘,造成断电,选 D。 1
  20. The switchboards for a.c. systems differ from the d.c. switch gear in that the open type panels are generally and the dead-front switch gear is the common rule.
A. permissibly permissible
B. permissible
C. no permissible
D. not
注:交流电系统的配电板与直流电的不一样,通常不允许使用开式面板,常使用 前端无电式的开关装置,选 D。 1
  21. The sub-multiple prefix """"""""milli"""""""" (m) means . A. one thousandth (10 to the -3rd power) the -6th power) C. one billionth ( 10 to the -9th power) the -12th power) 注:前缀“milli”表示千分之一(10-
  3),选 A。 1
  22. The sub-multiple prefix “micro” means . A. thousandth ( 10 to the - 3rd power) power) C. billionth ( 10 to the - 9th power) - 12th power)
-6
B. one millionth ( 10 to
D. one trillionth (10 to
B. millionth (10 to the -6th
D. trillionth (10 to the
注:前缀“micro”表示百万分之一(10 ),选 B。 1
  23. The sub-multiple prefix “nano” (n) means . A. thousandth (10 to the -3rd power) power) C. billionth ( 10 to the - 9th power) 12th power) B. millionth (10 to the -6th
D. trillionth ( 10 to the -
注:前缀“nano”表示十亿分之一(10-
  9),选 C。 1
  24. Remote control means that . A. the system is manned manually from the operator B. the system is situated remotely
C. the system is controlled automatically 注:遥控是指系统远离操作者,选 B。
D. all the above
1
  25. The is a crystal which, under pressure, produces an electric current which varies with the p
  •  
 

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