轮机英语三管轮试题---油水分离器.doc

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 discharge 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 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 clean 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 _____.
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 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, 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 "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 surface 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 collection 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. The 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 _____ 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 well
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
pumping 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 tank 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 _____.
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 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 pressure
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 has 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 valve 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 condensate 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 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 bilge 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 independent 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. 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 liquid 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 becomes 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.
1626. 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. holding 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. What 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 overboard
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. Classification 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 between 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 on 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
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 generally 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 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 little 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, 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 that 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 water?
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 adsorbents
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