大管轮轮机英语综合
A. recorded only for accidental oil discharges
B. recorded only for operations involving discharge of oily waste C. signed by the oiler who enters them in the Oil Record Book D. recorded chronologically in the blank space
26．Which bearing will carry the load on two small points diametrically opposite to each other?
A. Needle B. Tapered roller C. Roller D. Ball 27．In a general cargo crane, ______ is fitted to raise or lower the jib.
A. the slewing motor B. the luffing motor C. the hoisting motor D. none of the above 28．In an electro-hydraulic steering gear system, when will the variable displacement pump be placed
on stroke?
A. When the helm is at any angle other than amidships. B. When the six-way valve is opened. C. When the ram relief valves lift.
D. When the rudder angle is different from the position of the helm.
29．With reference to rules governing steering gear, which one of the following rules is incorrect ?
A. It is required that all ships are provided with two independent steering gear systems that is one main and one auxiliary.
B. The auxiliary gear could be power operated in passenger ships.
C. The auxiliary gear must be of adequate strength and sufficient to steer a ship at navigable speed.
D. All moving parts of the steering gear must be guarded against any possible damage. 30．A refrigeration system contaminated with moisture can be affected by ______.
A. acid formation B. sludge formation C. ice in the expansion valve D. all of the above 31．A dirty intercooler on the ship service air compressor will result in ______.
A. decreased compression ratio B. higher than normal power consumption C. un-loader malfunction D. water in the lubricating oil
32．Which of the problems listed would cause the discharge temperature of an R-22 refrigeration
compressor to increase?
A. Thermal expansion valve frozen open. B. Suction gas heat exchanger bypassed. C. Condenser clogged or fouled. D. High pressure cutout switch inoperative. 33．Zinc rods are installed in the refrigeration system ______.
A. liquid strainer B. liquid receiver C. saltwater condenser D. evaporator
34．The fire pumps must be capable of delivering a total quantity of water at a defined head , not less
than______ of the total bilge pumping capacity.
A. one-third B. two-thirds C. one-fourth D. two-fourths
35．Which of the following factors will have the greatest effect on the heating load within a
conditioned space?
A. Solar gain B. Infiltration and ventilation air
C. Occupants inside the space D. Entertainment equipment within the space
36．On commonly used ships, if two A.C. generators are operated in parallel, the load is distributed
evenly by ______.
A. varying the D.C. exciter voltage B. varying the reluctance of the air gap
C. regulating the speed of prime mover D. shorting out part of the armature windings
37．Which of the listed sections of an emergency switchboard is used to supply power for alarm
signals under emergency conditions?
A. The generator and bus transfer section B. The 450 volt, 60 cycle, 3 phase bus C. The 120 volt, 3 phase, 60 cycle bus D. The 24 volt DC bus
38．Which of the following should be the FIRST step in removing a generator from parallel operation?
A. Trip the generator off the switchboard. B. Turn off all electrical equipment.
C. Remove the load from the 'off going' generator.
D. Increase the cycles of the generator staying on the line.
39．Which of the listed devices is used to measure pressure and convert it to an electrical signal?
A. Transducer B. Reducer C. Transformer D. Rectifier
40．An indicator on the main switchboard should show ______the emergency battery is in service or
not.
A. which B. when C. weather D. whether 41．The number of cycles per second occurring in AC voltage is known as the ______.
A. phase angle B. frequency C. wave form D. half mode
42．While on watch in the engine room, you hear a continuous sounding of the general alarm. Which
of the following actions should you take? A. Make an entry in the official logbook.
B. Open the master control valves on the fixed CO2 system. C. Start the fire pump and check discharge pressure. D. Secure auxiliary condenser overboard discharge.
43．The additional mark ______ in the Classification Certificate for Machinery represents that
personnel are watching at engine assembly control station and monitoring all machinery and electronic devices.
A. BRC B. MCC C. AUT-0 D. AUT-1
44．If the atomizer holes are enlarged beyond the maker's recommended size , the atomizer must be
______.
A. repaired B. replaced C. replenished D. repeated
45．In a diesel engine, an extremely leaking exhaust valve can cause ______.
A. misfiring B. pre-ignition C. interrupted scavenging D. reduced scavenging
46．One cylinder of a diesel engine is persistently knocking and does not cease when the fuel supply
to that cylinder is secured. Which of the following problems may be the cause? A. Low loading of the cylinder. B. Excessive cooling of that piston.
C. Sluggish ring action on the piston. D. A mechanical defect in a working part. 47．Poor combustion in a diesel engine can be caused by ______.
A. high compression pressure B. low intake air temperature C. low exhaust pressure D. high scavenge air temperature
48．Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will ______.
A. reduce engine horsepower output B. aid in silencing the exhaust noise
C. increase the mean effective pressure D. contribute to effective cylinder scavenging 49．Hearing a strong noise, ______at once.
A. the engine stopped B. the engine was stopped C. he stopped the engine D. he had stopped the engine
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