大管轮轮机英语综合
sufficient ______.
A. overlap B. crush C. lap or lead D. protrusion
3. The engine has one or two group of fuel pumps, depending upon ______.
A. the number of fuel valves B. the number of cylinders C. the speed of engine D. the power of engine
4. Which of the following statements concerning the factors affecting ignition delay is correct?
A. An increase in intake air temperature will increase ignition delay. B. An increase in coolant temperature will decrease ignition delay.
C. An increase in combustion chamber turbulence will increase ignition delay. D. An increase in compression ratio will increase ignition delay.
5. ______providing lubricating films, oil used in marine diesel engines has to remove heat from oil
cooled piston.
A. Except for B. Beside C. Except D. In addition to
6. The ability of an oil to separate cleanly from an oil and water mixture is referred to as its ______.
A. precipitation number B. neutralization number C. pour point D. demulsibility 7. Before dismantling the pipe, would you ______the oil retained in the hose with ______?
A. flash/fresh air B. wash/fresh water C. flush/compressed air D. rush/diesel oil
8. Before “stand by” is rung on the engine telegraph, it is usual to give the main diesel engine a brief
trial ______ahead and astern.
A. with power B. on power C. with air D. on air
9. A number of cylinder liners are enclosed in one cast iron casing to form a ______.
A. cylinder cover B. cylinder block C. crankcase D. bed-plate
10. Between the periods of injection and ignition of the fuel, a diesel engine crankshaft rotates through
the ______.
A. detonation period B. firing period C. delay period D. advance period 11. The turbo-blower comprises a gas turbine and a ______.
A. condenser B. blower C. soot blower D. air receiver
12. Vessel propellers are classified as being right hand or left hand. A right hand propeller turns
clockwise when viewed from ______.
A. the bow B. the stern C. the port side D. the starboard side 13. ______the repair in such short time is unknown to us.
A. How they finished B. How did they finished C. That how they finished D. That how did they finished 14. In a simple mechanical governor, the ______.
A. centrifugal force rotates the ball-head
B. flyweight centrifugal force is balanced by spring force
C. flyweight centrifugal force is balanced by hydraulic pressure D. speeder spring alone actuates the fuel control rod 15. Wear in a cylinder liner is usually due to ______.
A. friction B. abrasion C. corrosion D. all of the above 16. A governor automatically controls engine speed by regulating ______.
A. fuel supply B. firing order C. engine load D. oil level
17. If the viscosity of the liquid being transferred remains constant as the discharge pressure increases,
the rotary pump ______.
A. capacity will increase B. capacity will decrease
C. suction pressure will increase D. suction pressure will decrease 18. The purpose of the wearing rings used in a centrifugal pump is to ______.
A. prevent an internal explosion in the pump when it is overheated B. enable a visual inspection of the pump while it is running C. insure a proper alignment of the pump coupling to the driver D. accommodate for friction between the impeller and the casing
19. When a boiler is operating, the water level in the gauge glass reads ______when the boiler is shut
down.
A. lower than B. higher than C. as much as D. the same as
20. The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a
result of ______.
A. seawater contamination B. frequent surface blows C. dissolved oxygen deaeration D. frequent bottom blows
21. For a purifier changing to a gravity disc with smaller hole diameter will move the interface
towards the ______.
A. bowl periphery B. bowl center C. upper surface D. lower surface
22. For a L.O. purifier, If the back pressure of the oil outlet is too high, the interface between oil and
water in the bowl will ______.
A. be interrupted B. move downwards C. move outwards D. retain original position 23. 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
24. The oil sludge is burnt in the ______onboard. I ll show you the ashes.
A. boiler B. main engine C. auxiliary engine D. incinerator 25. A class C' fire would most likely occur in the ______.
A. engine room bilges B. main switchboard C. paint locker D. rag bin
26. If the pump for a hydraulic anchor windlass is over heating, the cause may be ______.
A. increased pump speed B. excessive pump discharge pressure C. too low of a tilting box angle D. low pump speed
27. The hand steering is a method by which the motion of the rudder is controlled with ______.
A. a motor-driven steering wheel B. a pneumatic steering wheel C. a hand-driven steering wheel D. an electric steering wheel
28. An axial piston, variable stroke pump is used in a vessel's hydraulic steering gear. Under pressure,
oil continually leaks out from between the valve plate/ cylinder barrel and will ______. A. cause loss of hydraulic oil from the system B. result in extreme damage to the pump
C. cause damage to the pump if not continually drained from the pump casing D. result in the system high side pressure to substantially drop off
29. With reference to operating a four-ram steering gear system under emergency conditions, which
one of the following statements is incorrect ? A. Only one pump should be used at any time
B. The ship speed should be reduced to 70% of the normal C. Watch keeping of the steering gear should be increased
D. Limitations of the steering gear should be logged but the bridge need not be informed
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