大管轮轮机英语综合
78．To prevent the build up of high stresses engine must not be run continuously ______.
A. faster than dead slow speed B. slower than dead slow speed C. with the output of MCR D. at critical speeds 79．The turbo-blower comprises a gas turbine and a ______.
A. condenser B. blower C. soot blower D. air receiver
80．The thrust block or thrust bearing, located at the ______ of the engine, may be integral with, or
separated from, the bed-plate.
A. fore end B. aft end C. ahead D. astern end
81．The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with
scavenge ports in the sides of the cylinder being ______. A. shut B. closing C. opened D. closed
82．The pressure of pilot air is usually______ than that of starting air.
A. higher B. lower C. low D. high
83．When a centrifuge is arranged to separate impurities and small amount of water from oil, it is
known as a _______.
A. purifier B. separator C. filter D. clarifier
84．The control system for a controllable pitch propeller can be programmed______.
I. to produce a maximum combined propeller and engine efficiency between itch and a given engine speed
II. for continuous operation of the engine at pre-set condition A. I only is correct B. II only is correct
C. both I and II are correct D. neither I or II are correct
85．The amount of fluid delivered by a helical pump can be regulated by ______.
A. throttling the pressure line B. changing the speed of the rotor C. either A or B
D. None of the above is true.
86．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
87．When steam is being raised on a boiler, the water level will normally ______.
A. drop as the boiler warms up B. rise as the boiler warms up
C. remain unchanged until the boiler is hot enough D. rise and fall with the steam demand
88．Which of the following conditions could cause the feed pump for an auxiliary boiler to lose
suction?
A. Increased suction head pressure. B. Decreased feedwater temperature.
C. Pump recirculating line being open too much. D. Excessive feedwater temperature.
89．The______ of the gravity disc is too big. It cause oil to flow through the water outlet. We
changed the disc and no oil is found in the water outlet.
A. gravity B. diameter C. circumference D. cylinder
90．The diameter of the gravity disc is too big. It causes oil to flow through the water outlet. We
changed the disc and no ___ is found in the water outlet. A. water B. oil C. scale D. ridge
91．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
92．The term 'discharge', as it applies to the pollution regulations, means_______.
A. spilling B. leaking C. dumping D. All of the above 93．A class C' fire would most likely occur in the______.
A. engine room bilges B. main switchboard C. paint locker D. rag bin
94．Which of the following statements describes the functions of a reservoir used in a hydraulic
system?
A. Dissipate heat B. Trap foreign matter C. Separate air from the oil D. All of the above 95．______are used for cargo handling.
A. Cranes B. Mooring winches C. Windlasses D. Foreman
96．In the cargo winch, spur reduction gearing transfers the motor drive to______.
A. the toping light B. the board brake C. the fail-safe D. the barrel shaft
97．The main steering gear must be able to steer the ship at maximum ahead service speed and be
capable at this speed, and at the ship s deepest service draught, of putting the rudder from 35 degrees on one side to 30 degrees on the other side within no _____. A. more than 28 seconds B. more than 60 seconds C. less than 28 seconds D. less than 60 seconds
98．Freon 12 which is used to produce intense cold is normally a______ when at atmospheric
pressure and temperature.
A. liquid B. gas C. solid D. water only 99．Which of the statements listed concerning heat transfer is correct?
A. Heat is always transferred at a constant rate.
B. Heat transfer rate increases as temperature difference increases. C. The rate of heat transfer is not affected by temperature difference. D. The high temperature region is known as a heat sink. 100． The cooler as the liquid becomes, ______.
A. the faster it will evaporate B. the slower it will condense C. the slower it will evaporate D. the faster it will flow
101． In a refrigeration system, if the cooling water to the condenser fails, the______.
A. box temperature solenoid valve will close B. expansion valve will close C. compressor will shutdown D. king valve will open
102． A feeler or thermal bulb is used for the expansion valve to______.
A. detect the temperature B. detect the pressure
C. heat the refrigerant D. accelerate the refrigerant
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