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1、轮机英语 1591. Oil water separators are used to ensure that ships don't discharge oil when pumping out _____. A. ballast water B. boiler water C. bilge water D. sewage water 1592. The bilge main is arranged to drain any watertight compartment _____ ballast, oil or Water tanks and to di
2、scharge the contents overboard. A. rather than B. other than C. in addition that D. except for 1593. Emulsification of oil will occur when mixed with _______. A. air B. black oil C. water D. ice cream 1594. In an oily water separator the oil will travel _____ to the oil
3、 collecting spaces. A. upwards B. downwards C. outwards D. forwards 1595. 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. A. with dirty water B. with cle
4、an water C. by oily water D. by mixed water 1596. A high rate of separation between oil and water is favored by _____. A. large size of oil globule B. low temperature C. high viscosity D. high flow rate 1597. If a bilge pump failed to build up discharge pressure, you should check for _____
5、 A. excessive water in the bilges B. a clogged suction strainer C. oil in the bilges D. All of the above 1598. The emergency bilge suction or bilge injection valve is used to prevent _____ of the ship. A. proceeding B. overloading C. collision D. flooding 1599. All bilge suctions must be
6、fitted with suitable _____, which in the machinery space would be mud boxes positioned at floor plate level for easy access. A. strangers B. relief valves C. emergency valves D. strainers 1600. Coalescence is the breakdown of surface tension between oil droplets in an oil/water mixture,
7、 which causes them to join and _____ in size. A. expand B. extract C. increase D. decrease 1601. In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is flee to rise into the oil collecting space. What's the meaning of "
8、it" in the sentence above? A. a separator B. oil C. water D. an oil collecting space 1602. Oil water separators are used to ensure that ships don't discharge oil when _____ bilge water. A. to pump off B. being pumped C. pumping out D. it pumping out 1603. _____ is the breakdown of s
9、urface tension between oil droplets in an oil water mixture which causes them to join and increase in size. A. Wear B. Contaminating C. Coalescence D. Coarse separating 1604. Here some oil in the oily water separator, as a result of its lower _____, will separate and rise into the oil c
10、ollection space. A. temperature B. viscosity C. density D. velocity 1605. All bilge suction must be fitted with suitable _____, which in the machinery space would be mud boxes positioned at floor-plate level for easy access. A. strainers B. valves C. elements D. separators 1606. Th
11、e oil _____ in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out. A. filter B. hole C. pollution D. content 1607. The remaining oil/water mixture now flows down into the fine separating compartment and moves slowly between the __
12、 in the Turbulo separator. A. catch plates B. swash plates C. cover plates D. bedplates 1608. An oil water monitor is required in order to measure _____. A. the oil content in water B. the water content in fuel oil C. the water level in bilge well D. the oil level in bilge we
13、ll 1609. The bilge main is arranged to drain any watertight compartment _____ ballast, oil or water tanks and to discharge the contents overboard. A. more than B. other than C. in addition to D. except for 1610. Oil water separators are used to ensure that ships don't discharge oil when p
14、umping out _____. A. ballast water B. boiler water C. bilge water D. sewage water 1611. Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operated. The discharging liquid is then passed to _____. A. overboard B. a bilge well C. a slop ta
15、nk D. a hot well 1612. If a bilge pump failed to build up discharge pressure, you should check for _____. A. excessive water in the bilges B. a clogged suction strainer C. oil in the bilges D. a closed skin valve 1613. The emergency bilge suction valve is typically used _____.
16、 A. to inject cleaning additives when the bilges are extremely dirty B. when the main condenser becomes fouled, in order to provide additional cooling water circulation C. to connect the rose box to the independent bilge suction D. if the bilges become flooded and they can not be emptied by any
17、other means 1614. A centrifugal bilge pump requires priming _____. A. primarily to lubricate the shaft seals B. due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller C. to initially unload the pump by having its head pressure equal to discharge press
18、ure D. in order to overcome the potential energy of water in the discharge line 1615. The ability of an oil to separate cleanly from an oil and water mixture is referred to as its _____. A. precipitation number B. neutralization C. pour point D. demulsibility 1616. The bilge system h
19、as been performing well; however, the aft starboard engine room bilge well suddenly fails to be pumped out. Which of the following should be done first to determine the cause? A. Open the bilge pump for inspection. B. Remove each of the manifold valves. C. Remove only the manifold val
20、ve to the affected bilge-well. D. Attempt to pump out another bilge well to determine if the entire system is affected. 1617. Which pump installation would require an external source of sealing water? A. Main circulator pump jacket water cooling. B. Salt water service pump. C. Auxiliary conde
21、nsate pump. D. Bilge pump. 1618. One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the _____. A. motor overload will open B. relief valve will open C. pump will overheat D. motor will overheat 1619. If an operating
22、bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause? A. The wearing rings are excessively worn. B. The suction strainer is clogged. C. The discharge valve is clogged. D. The shaft is worn. 1620. If a bi
23、lge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT_____. A. the circuit breaker B. for leaks in the suction piping C. relief valve .is not properly seated D. the suction strainer 1621. An indepen
24、dent bilge suction is required for _____. A. ballast tanks B. sludge tanks C. machinery space bilges D. cargo hold bilges 1622. If a centrifugal bilge pump were continually operated with the discharge valve closed the _____. A. motor overload would open B. relief valve would open C
25、 pump would eventually overheat D. motor would overheat 1623. To thoroughly pump out the bilges using a horizontally mounted centrifugal pump, the _____. A. pump must always be primed B. volute must impart a radial and rotary motion of the water suction side C. connection must guide the li
26、quid to the lantern rings D. stuffing box should not be allowed any water leakage 1624. Bilges may be pumped _____. A. on the outgoing tide B. overboard after dark C. overboard through an oily water separator D. anytime in an emergency, i.e. main engine lube oil failure 1625. If it becom
27、es necessary to pump bilges while a vessel is in port, which of the following procedures should be followed? A. Pump only if the discharge is led to a shore tank or barge. B. Pump only during the hours of darkness. C. Pump only on the outgoing tide. D. Pump only as much as is necessary. 162
28、6. A new ocean going ship of 2000 gross tons having an inoperative oily water separator may dispose of its bilge slops by _____. A. holding its slops onboard until they can be pumped into the city sewer system B. circulating them through the lube oil purifier to remove water and debris C. holdin
29、g its slops onboard until they can be discharged to a shore side reception facility D. pumping them into a settling tank for separation before pumping the oily water residue overboard 1627. An oceangoing ship of 400 gross tons and above must be fitted with a standard discharge shore connection. W
30、hat is the size of the bolt circle diameter of the shore connection required to transfer oily ballast to a shore side reception facility? A. 125 mm B. 183 mm C. 215 mm D. It depends on outside pipe diameter. 1628. Which of the following liquids can ordinarily be discharged overbo
31、ard without being processed through an oily water separator? A. Cargo tank ballast. B. Segregated ballast. C. Engine room bilges. D. Cargo pump room bilges. 1629. The minimum number and capacity of bilge pumps and fire pumps and their dispersement within the ship is governed by _____. A. C
32、lassification Society Rules B. National requirements C. The IMO International Convention for the Safety of Life at Sea D. All of the above 1630. The principle of separation by which all commercially available oily water separators function is _____ differential b
33、etween oil and water. A. the temperature B. the viscosity C. the gravity D. the size 1631. The resistance to the movement of the globule in oily water mixture depends on its size and the _____ of the fluid. A. pressure B. velocity C. gravity D. viscosity 1632. Placing a filter o
34、n the _____ of an oily water separator will "polish" the discharge but overloading must be avoided. A. suction side B. discharge side C. by-pass pipe D. sampling pipe 1633. The most suitable pump for oily water separator feed duties is_____. A. a reciprocating pump B. a vane pump
35、 C. a centrifugal pump D. a triple screw pump 1634. To assist separation of low viscosity oils steam coils or electric heaters are fitted ______ of the oily water separator. A. in entrance B. in exit C. in the upper part D. on the outside 1635. Which one of the following is not gener
36、ally recognized as one constitute of bilge water? ______________. A. Oil leaking from tanks inside engine room B. Engine room cleaning water C. Water leaking from the separator sludge tank D. Sewage water 1636. When bilge water is heated in a holding tank, which
37、one of the following statements is not accurate? ____________. A. The high temperature facilitates primary gravity separation B. Most of the oil and organic solvents are raised to the top layer C. The high the temperature is, the more the top oil will be collected D. The high temperature has lit
38、tle use on the separation of emulsified oil 1637. When discharging bilge water, which criteria must be observed? _____________. A. The requirement for the oil content of bilge water discharged is 15 ppm B. No discharge in sensitive waters C. Any discharge in sensitive waters D. International
39、 national or local requirements have to be observed 1638. Which of the following methods might be used as the treatment on emulsified oil? ___________. A. gravity separation B. centrifuge C. Cyclone D. Cross-flow membrane filtration 1639. What’s the advantage of oily water separator t
40、hat meets the requirement of MEPC 60(33) over MEPC 107(49)? A. more economic B. larger capacity on oil treatment C. less costive D. more capable of separating emulsified oil 1640. Which of the following methods might favor oil emulsion in bilge wat
41、er? A. Raising temperature B. less use of surfactant C. more use of solvent D. polishing device fouling prevention 1641. Which of the following methods can remove the non-separable emulsified oil in bilge water? A. gravity separation B. use of adsorbent
42、s C. use of flocculents D. use of chemical addition 1642. Accidental flooding of the engine room bilges by the bilge main is prevented by _____. A stop-check valves installed in the bilge suction manifolds B using a positive displacement reciprocating bilge pump C installing eductors in all bilge rose boxes D installing a swing check before each bilge valve
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