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单选题
Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to （）.
A
the effects of beam width
B
limitations on range resolution
C
the pulse length of the radar
D
the multiple-target resolution factor
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“AMIDSHIPS ” refers to______.A.Back of the vesselB.The middle portion of a shipC.A backward movement of a vesselD.Across the ship, at right angles to the fore-and-aft centerline
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Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to ______.A.the effects of beam widthB.limitations on range resolutionC.the pulse length of the radarD.the multiple-target resolution factor
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In relation to the turning circle of a ship, the term advance means the distance ______.A.gained at right angles to the original courseB.gained in the direction to the original courseC.moved sidewise from the original course when the rudder is first put overD.around the circumference of the turning circle
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In relation to the turning circle of a ship, the term kick means the distance ______.A.around the circumference of the turning circleB.gained at right angles to the original courseC.gained in the direction to the original courseD.or throw of a vessel’s stern from her line of advance upon putting the helm hard over
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共用题干
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The line leading at right angles to the （）(中线) from the forecastle to the shore is called the forward breast line.A、draftB、waterlineC、centerlineD、abeam
考题
单选题A mooring line leading at nearly right angles to the keel is a（）.A
bow lineB
breast lineC
spring lineD
stern line
考题
单选题A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.A
dikeB
revetmentC
cutoffD
crib
考题
单选题In relation to the turning circle of a ship , the term advance means the distance（）.A
gained at right angles to the original courseB
gained in the direction of the original courseC
moved sidewise from the original course when the rudder is first put overD
around the circumference of the turning circle
考题
单选题Mariners are reminded that they should proceed in the general direction indicated by the arrows or，if（）a lane，they should do so as nearly as practicable at right angles to it.A
crossB
crossingC
crossedD
crosses
考题
单选题（） connected to the moving tiller will bring the floating lever pivot and the lever into line at right angles to the screw shaft axis.A
A cut-off leverB
A swivel blockC
A cross-headD
A driving gear
考题
单选题A Chinese stopper (two lines) will hold best when you（）.A
fasten the bitter ends to the mooring line with half hitchesB
twist the ends together and hold them in the direction of the pullC
twist the ends together and hold them in the direction opposite to the pullD
twist the ends together and hold them at right angles to the mooring line
考题
单选题Which one of the following is a counterexample to the statement “If two angles are supplementary, then they are right angles?”A
If two angles are complementary, then they are not right angles.B
If two angles are fight angles, then they are supplementary.C
If two angles are not supplementary, then they are not right angles.D
If two angles are supplementary, then one could measure 100° and one could measure 80°.E
If two angles are not fight angles, then they are not supplementary.
考题
单选题To ensure the best results during the Mediterranean moor，the chains should（）.A
be crossed around the bowB
tend out at right angles to the bowC
tend aft 60°from each bowD
tend forward 30°on either bow
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单选题The largest waves (heaviest chop) will usually develop where the wind blows（）.A
at right angles to the flow of the currentB
against the flow of the currentC
in the same direction as the flow of the currentD
over slack water
考题
单选题In relation to the turning circle of a ship , the term transfer means the distance（）.A
gained in the direction of the original courseB
gained at right angles to the original courseC
the ship moves sidewise from the original course awayfrom the transfer means the distanceD
around the circumference of the turning circle
考题
单选题In a traffic separation scheme，when joining a traffic lane from the side，a vessel shall do so（）.A
only in case of an emergency or to engage in fishing within the zoneB
as nearly as practical at right angles to the general direction of traffic flowC
at as small an angle as possibleD
only to anchor within the zone
考题
单选题Flexible hose under pressure in a hydraulic system will （）.A
tend to twist about its long axisB
expand in length and in diameterC
contract in length and expand in diameterD
flex at right angles to the applied pressure
考题
单选题In any right triangle, the acute angles are ______.A
EqualB
Adjacent anglesC
Vertical anglesD
Complementary anglesE
Supplementary angles
考题
单选题In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so（）.A
at as small an angle as possibleB
as nearly as practical at right angles to the general direction of traffic flowC
only in case of an emergency or to engage in fishing within the zoneD
never
考题
单选题The type of current which will have the greatest effect on the course made good for your vessel is（）.A
one flowing in the same direction as your course steeredB
one flowing in the opposite direction as your course steeredC
one that flows at nearly right angles to your course steeredD
a rotary current in which the direction of current flow constantly changes
考题
单选题The distance a vessel moves at right angles to the original course，when a turn of 180°has been completed，is called the（）.A
advanceB
pivoting pointC
tactical diameterD
kick
考题
单选题In a married falls rig at the after end of a hatch , a boom is rigged in a fore and aft line through its heel . Stresses on the outboard guy will be least if the guy is made fast at a point（）.A
abreast the heelB
at right angles to the boom when viewed from aboveC
aft of the heelD
forward of the spiderband
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