最新甲类三管英语考试试题 精品.docx

1、最新甲类三管英语考试试题 精品1、 In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during _.A. compression stroke B. suction stroke C. expansion stroke D. exhaust stroke2、 In a four stroke engine, which process lasts the longest period?A. e

2、xhaust and suction process B. suction and compression processC. combustion and exhaust process D. working and exhaust process3、 On what do you depend having the air cooler of main engine chemically washed?A. increased air pressure difference before and aft air cooler B. reduced exhaust temperature i

3、n all cylindersC. reduced temperature difference between water inlet and outletD. both A and C4、 When occurring a fire in the scavenge air box, the following measures should be taken except for_.A. reducing speed to SLOW and asking bridge for permission to stopB. stopping the fuel oil supplyC. switc

4、hing-on the auxiliary blowers D. putting the scavenge air box fire extinguishing equipment into function5、 Continuous surging of turbocharger can be caused by_.crash stop of engine; increased back pressure after T.Ch.;fouled or damaged turbine nozzle ring.A. all are correct B. and are correctC. none

5、 of the above is correct D. only is correct6、 When a sudden increase in steam demand occurs from the boiler, the water level in the drum at the higher pressure will_.A. rise quickly B. rise slowlyC. drop quickly D. drop slowly 7、 On modern ships, centrifugal pump with a self-primer has replaced reci

6、procating pump as bilge pump because_. A. centrifugal pump is cheaper than reciprocating pump B. the size of centrifugal pump with same capacity is smaller than that of reciprocating pumpC. centrifugal pump makes maintenance easier than reciprocating pump doseD. all of the above8、 Which cause of fol

7、lowing will not lead to refrigeration plant short-cycle?A. lack of refrigerant B. refrigerant with much water C. set defectively low pressure relay D. no cooling water 9、 To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should b

8、e provided on board?A. bilge tank B. sludge tank C. overflow tank D. oil collecting tank10、 The oil discharge monitoring system in the oil tanker vessels is used for detecting the amount of oil discharged overboard to ensure that it does not exceed_.A. 15 liters/ nautical mile B. 30 liters/ nautical

9、 mile C. 60 liters/ nautical mile D.100 liters/ nautical mile 11、 Which of the following functions is not one of the functions of air conditioner ? A. refreshing the air B. making person upsetC. adjusting the air humidityD. adjusting the air temperature12、 Which of the following statements is not tr

10、ue concerning symptom of a fire in the scavenge air box? A. an increase in the exhaust temperature of the affected cylinderB. the turbocharger may surgeC. the explosion pressure in all cylinders will rise violentlyD. smoke from the turbocharger air inlet filter will be seen13 What type of electric m

11、otor is most commonly used on board ship?A. non-synchronous electric motorB. synchronous electric motorC. fully enclosed electric motorD. watertight electric motor14 According to the principle of four stroke diesel engine, what is the number of its efficient work stroke per revolution?A. 1/2 B. 1 C.

12、 2 D. 315 What is head tank in the closed cooling water system used for?A. for the release of air from the cooling waterB. providing expansion room for heated cooling waterC. a place for implementing water and water treatment agentD. all of the above16 The function of synchronous compensating machin

13、e is to _.A. improve power factorB. reduce voltage oscillationC. increase the insulation of circuitsD. eliminate regenerated magnetic fields17 Continuous surging of turbocharger can be caused by_.crash stop of engine; increased back pressure after T.Ch.;fouled or damaged turbine nozzle ring.A. all a

14、re correct B. and are correctC. none of the above is correct D. only is correct18 A few spots of turbocharger surging can be caused by _.crash stop of engine;rapid increase of engine speed.A. only is correct B. only is correctC. both and are correct D. neither or is correct19 With one or more cylind

15、ers out of operation, the engine speed must be reduced because _.A. in such cases, the air supply is no longer optimal, the thermal load will be higherB. governor hunting will occurC. torsional vibrations as well as other mechanical vibrations may occurD. all of the above are correct20 The nameplate

16、 of a AC non-synchronous motor shows that running speed is 1460r/min, frequency 50Hz. You can infer that the number of magnetic poles is_.A. 2 B. 4 C. 6 D. 821 “380V/220V Y/” noted on the nameplate of a non-synchronous motor means that_.A. the armature terminals of the motor should be connected in s

17、tar formation when voltage of power supply is 380VB. the armature terminals of the motor should be connected in delta formation when voltage of power supply is 220VC. both A and B are correctD. the armature terminals of the motor should be connected in reverse ways of A and B22 The initial voltage o

18、f Self-excitation generator is generally set up by _.A. residual magnetism B. voltage regulator C. electrical current for excitation D. the other running generator 23 The DC excitation to the field of Brushless synchronous generator is generally produced by_.A. a exciter driven by the same shaft wit

19、h the generator B. a exciter driven by external prime moverC. generator itselfD. either A or B24 When a sudden increase in steam demand occurs from the boiler, the water level in the drum at the higher pressure will_.A. rise quickly B. rise slowlyC. drop quickly D. drop slowly 25 When a sudden incre

20、ase in steam demand comes to normal, the drum pressure will_ and water level in the drum will_.A. rise, rise also B. rise, drop C. drop, rise D. drop, drop also26 Which of the following equipment is not pollution prevention equipment?A. oily water separator B. sewage treatment plantC. fuel oil separ

21、ator D. incinerator27 which of the following pumps is most suitable for an oily water separator?A. reciprocating pump B. vane pumpC. mono pump D. axial-flow pump28 Which of the following pumps will most affect oily-water separator performance and give the worst result?A. reciprocating pump B. vane p

22、umpC. screw pump D. centrifugal pump29 On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because_. A. centrifugal pump is cheaper than reciprocating pump B. the size of centrifugal pump with same capacity is smaller than that of reciprocating pumpC. c

23、entrifugal pump makes maintenance easier than reciprocating pump doseD. all of the above30 22 To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?A. bilge tank B. sludge tank C. overflow tank D. oil coll

24、ecting tank31 23 According to the principle of two stroke diesel engine, what is the number of its efficient work stroke per revolution?A. 1/2 B. 1 C. 2 D. 332 24 There will usually be summaries or daily account tables for heavy oil, diesel oil, lubricating oil, and fresh water, which will be compil

25、ed_.A. at the beginning of every watch B. at the beginning of the first watch every dayC. at the completion of every watch D. at noon every day33 However, where immediate action is necessary to ensure safety of the ship, its machinery and crew, it must be taken by the engineer in charge. What does “

26、it” mean in the sentence above?A. safety B. the ship, its machinery and crewC. immediate action D. the engineer in charge34 What is used for preventing pollution damage to the sea from ships?A. MARPOL 73/78 B. SOLAS 74 C. STCW 78/95 D. ISPS 200235 During tours of inspection in the machinery space, y

27、ou found a fire on a running generator, what should you do first? A. inform chief engineer officer immediately B. stop the generator C. let the duty officer in bridge determine how to do D. wait for help 36 Which cause of following will not lead to refrigeration plant short-cycle?A. lack of refriger

28、ant B. refrigerant with much water C. set defectively low pressure relay D. no cooling water 37 If two fuel service tanks are installed, the empty tank should be pumped up directly it is empty. What is the meaning of “directly” in the sentence above?A. at once B. as soon as C. quickly D. straight38

29、From viewpoint of practice, it is sometimes important to detect abnormal happenings in the running gear by _.A. a keen sense of hearing B. rich theory C. communicating ability with others D. repetition work 39 Where is the cooling water from the compensating tank in the cooling water system of main

30、engine lead to?A. discharge side of the centrifugal pump B. suction side of the centrifugal pumpC. the lowest point of the cooling water system D. inlet of the main engine40 Crude oil washing of cargo tanks has the following advantages except for _.A. reducing the erosion of the cargo tanks B. incre

31、asing the total quantity of oil to carryC. reducing the quantity of water contained in oil D. reducing cargo discharged time41 Which system(s) in the hydraulic systems of crane always hold(s) single side of load?A . hoisting system only B. hoisting system and luffing systemC. hoisting system and slewing system D. slewing system only42 On what do you depend having the air cooler of main engine chemically washed?A. increased air pressure difference before and aft air cooler B. reduced exhaust temperature in all cylindersC. reduced