更多"Some lights used as aids to marine "的相关试题:
[单项选择]Navigation lights must be displayed in all weathers from sunset to sunrise. They also（）.
A. must be displayed when day signals are being used
B. must be displayed when moored to a pier
C. may be extinguished at night on open waters when no other vessels are in the area
D. may be displayed during daylight
[单项选择]To determine what navigation lights and day-shapes must be displayed on mobile offshore drilling units under tow，you should check the（）.
A. American Bureau of Shipping classification rules
B. International Regulations for Preventing Collisions at Sea
C. Safety of Life at Sea Convention
D. Minerals Management Service rules
[单项选择]Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）
A. activate the driers
B. change color
C. secure the compressor
D. add a predetermined amount of liquid drier
[单项选择]Plain language is usually used on marine weather（）.
A. forecasts
B. observations
C. analyses
D. reports
[单项选择]（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.
A. Except for
B. Beside
C. Except
D. In addition to
[单项选择]（）is used in typical marine pattern self-contained unit.
A. a water cooled condenser
B. a slop tank
C. a expansion tank
D. a centrifugal pump
[单项选择]（）are used for anchor gear in marine work where the chains must withstand the corrosive effects of seawater.
A. Chains
B. Wires
C. Ropes
D. Lines
[单项选择]A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.
A. camshaft
B. flywheel
C. crankshaft
D. thrust shaft
[单项选择]Before the final examination, some students have shown（）of tension. They even have trouble in sleeping.
A. anxiety
B. marks
C. signs
D. remarks
[单项选择]How should signal flares be used after you have abandoned ship and are adrift in a liferaft?（）.
A. Immediately use all the signals at once
B. Use all the signals during the first night
C. Employ a signal every hour after abandoning ship until they are gone
D. Use them only when you are aware of a ship or plane in the area
[单项选择]Anchor capstans are used in some installation where the cable lifter rotates about a （）.
A. horizontal axis
B. crankshaft
C. vertical axis
D. camshaft
[单项选择]Some of these shoals have been disproved and are not charted. Nevertheless mariners should （）with particular caution in this area.
A. go
B. proceed
C. move
D. remove
[单项选择]Some of the citizens have been（）medals for bravery.
A. given
B. offered
C. awarded
D. paid
[单项选择]Valve cages are used on some large diesel engines to （）
A. reduce wear on the valve stem
B. permit the use of alloy valve seat materials
C. reduce heat transfer from the valve seat
D. facilitate valve removal for servicing
[单项选择]Anchor（） are used in some installations where the cable lifter rotates about a vertical axis.
A. windlasses
B. drums
C. capstans
D. warp ends
[单项选择]In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.
A. fresh water
B. sea water
C. cooling oil
D. emulsion
[单项选择]The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.
A. water
B. oil
C. heat
D. steam
[单项选择]The （） engine is used for alternators and some times for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.
A. four-stroke
B. two-stroke
C. slow speed
D. reversible
