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Lines drawn through points on the Earth having the same atmospheric pressure are known as ___________.
A.isothermal
B.millibars
C.isobars
D.Seismics
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单选题What is the purpose of pressure-vacuum relief valves? （）A
Regulation of discharge pressure from cargo pumpsB
Maintaining constant velocity in cargo linesC
Regulation of suction head on cargo pumpsD
To maintain a tank or void at atmospheric pressure
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单选题Cargo pump relief valves are piped to the（）.A
cargo pump pressure gaugesB
crossover lines interconnecting two pumpsC
suction side of pumpsD
atmosphere through pump vents
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单选题Generally speaking，you should expect to find low atmospheric pressure prevailing in the earth’s（）.A
equatorial areaB
polar regionsC
mid-latitudesD
All of the above
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liquidB
gasC
solidD
water only
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单选题Lines on a chart which connect points of equal magnetic variation are called （）.A
magnetic latitudesB
magnetic declinationsC
dipD
isogonic lines
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单选题A microbarograph is a precision instrument that provides a（）.A
charted record of atmospheric temperature over timeB
charted record of atmospheric pressure over timeC
graphic record of combustible gases measured in an atmosphereD
graphic record of vapor pressure from a flammable/combustible liquid
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单选题As observed from the Earth，the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as（）.A
elongationB
conjunctionC
oppositionD
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单选题Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.A
IsothermalB
MillibarsC
IsobarsD
Seismics
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单选题The direction of the surface wind is（）.A
directly from high pressure toward low pressureB
directly from low pressure toward high pressureC
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from low pressure toward high pressure deflected by the earth's rotation
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单选题A turbocharged diesel engine will have an intake manifold pressure（）A
constantly decreasing as engine load increaseB
constantly increasing as the amount of supercharging increasesC
approximately equal to exhaust manifold pressure at all timesD
approximately equal to atmospheric pressure at all times
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globe valvesB
butterfly valvesC
gate valvesD
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单选题On the pole side of the high pressure belt in each hemisphere，the pressure diminishes. The winds along these gradients are diverted by the Earth’s rotation toward the east and are known as the（）.A
geostrophic windsB
doldrumsC
horse latitudesD
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单选题If two mooring lines are to be placed on the same bollard，which method is BEST?（）.A
Place the eye from the forward line on the bollard and then place the eye from the second line directly over the firstB
It makes no difference how the lines are placedC
Place the eye from either line on the bollard，and then bring the eye of the other line up through the eye of the first，and place it on the bollardD
Place both eyes on the bollard，in any manner，but lead both lines to the same winch head on the vessel and secure them on the winch
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单选题What is the basic principle of the magnetic compass（）.A
Magnetic materials of the same polarity repel each other and those of opposite polarity attractB
The Earth's magnetic lines of force are parallel to the surface of the EarthC
Magnetic meridians connect points of equal magnetic variationD
The compass needle（s）will，when properly compensated，lie parallel to the isogonic lines of the Earth
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单选题In which voyage, between two points, is the rhumb line distance not approximately the same as the great circle distance?（）.A
The two points are in low latitudes in the same hemisphereB
The two points are in high latitudes in the same hemisphereC
The two points are near the equator, but in different hemispheresD
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单选题Which statement is TRUE about placing the eyes of two mooring lines on the same bollard?（）A
Put one line at the low point and one at the high point of the bollard so they don't touchB
Take the eye of the second line up through the eye of the first line before putting the second line on the bollardC
Never put two mooring lines on the same bollardD
The mooring line forward should be put on the bollard first
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单选题An instrument designed to maintain a continuous record of atmospheric pressure is a(n)（）.A
mercurial barometerB
aneroid barometerC
barographD
thermograph
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