【正文】 the gauge glass reads_____ when the boiler is shut down. A. lower than B. higher than C. as much as D. the same as *1426 Strainers and fine filters should be cleaned at intervals, _____ prevent dirt from getting under a fuel injection pump valve. A. in order that B. so as to C. so that D. in addition to Jimei University 1427 The fine filters will be arranged_____ one can be cleaned while the other is operating. A. in order to B. because of C. so that D. so as to 1428 In_____, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes. A. a flash generator B. a flash evaporator C. a vacuum boiling evaporator D. a boiler Jimei University 1429 In an oil cooler circulated by sea water, the oil is at a larger pressure the result being that any leak in the cooler will mean a loss of_____. A. oil B. sea water C. refrigerant D. fresh water 1430 Sediment collects in a tubular purifier_____. A. on top cover B. on sides of bowl C. in drain line on the discs D. on the discs Jimei University 1431 The_____ discharge a nearly constant amount of liquid regardless of pressure. A. mixedflow pump B. axialflow pump C. centrifugal pump D. displacement pump 1432 The gear, screw, and vane pumps are all classified as_____. A. variable stroke pumps B. multistage pumps C. positive displacement pumps D. tripleported pumps Jimei University 1433 Which of the following are ponents of a mechanical seal? (1) stationary ring。t work D. wouldn39。輪機(jī)工程學(xué)院輔機(jī)教研室 輪機(jī)英語考試強(qiáng)化復(fù)習(xí) （ 3000KW及以上船舶二管輪 /三管輪 ） Jimei University 1401 We use_____ to distill fresh water from sea water. A. engine B. sea water pump C. cylinder cooler D. fresh water generator 1402 Because of the reduced_____ in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes. A. temperature B. water level C. pressure D. rate of flow Jimei University *1403 The fresh water generator produces fresh water_____. A. by cooling sea water B. by heating sea water C. by evaporation of sea water D. by purifying sea water 1404 Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl_____. A. bottom B. top C. center D. periphery Jimei University *1405 The designed capacity is 25 tons a day, but the fresh water generator can only_____ 22 tons at present. A. consume B. distill C. run D. operate 1406 In the process of_____, liquid changes into gas. A. evaporation B. frosting C. condensing D. pressing Jimei University *1407 More than one stage of evaporation can take place by admitting the sea water into chambers with progressively_____ pressure in the flash evaperator. A. lower B. higher C. the lower D. the higher Jimei University 1408 You must take good care of the drainage cock of the air control system. Because_____ leads scale formed which might malfunctions the pilot control valve and other instruments. A. the temperature B. the rust C. the pressure D. the humidity Jimei University *1409 Keep partment_____ as the gas given off can be dangerous. A. well ventilated B. well clean C. in good order D. more room 1410 Gear pumps are_____ because they discharge a near constant amount of liquid regardless of pressure. A. negative displacement type B. turbine type C. positive displacement type D. mixedflow type Jimei University 1411 The boiler is fired_____ the demand for steam exceeds that available from exhaust gas heating. A. whenever B. however C. wherever D. whether 1412 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 Jimei University *1413 Oil Record Book Part I shall be provided to every oil tanker of 150 tons gross tonnage and above and every ship of 400 tons gross tonnage and above, _____ oil tankers, to record relevant machinery space operations. A. as well as B. as long as C. rather than D. other than Jimei University 1414 The bilge main is arranged to drain any watertight partment_____ ballast, oil or water tanks and to discharge the contents overboard. A. more than B. other than C. in addition to D. except for Jimei University *1415 If oil density were greater than water39。 s, the oil separator_____. A. did work B. would work well C. didn39。t work 1416 Oil water separators are used to ensure that ships don39。 (2) rotational ring。 (4)spring. A. (1), (2) and (3) B. (1), (2) and (4) C. (2), (3) and (4) D. None of the above. 1434 The pressure head of a water pump is given in the unit of_____. A. kg B. MPa C. mH20 D. None of the above. Jimei University 1435 A vane pump belongs to_____ according to its working principle. A. reciprocating pumps B. positive displacement pumps C. centrifugal pumps D. centripetal pumps Jimei University 1436 Attempts are made to eliminate axial thrust in centrifugal pump by_____. A. providing the impeller with counterbalancing holes B. the use of symmetrical impeller C. neither A nor B D. A