海员统考英语试题库新版(7)

A. all-round yellow light only B. all-round white light only C. all-round blue light only

D. alternating red and yellow light KEY: B

[212]A line of position derived from a loran reading is a section of a(n) ______. A. straight line B. arc

C. parabola D. hyperbola KEY: D

[213]A line of position from a celestial observation is a segment of a ______. A. circle of equal altitude B. parallel of declination C. parallel of altitude D. vertical circle KEY: A

[214]A list man would expect to see any of the following light signals EXCEPT ______. A. two red lights B. one green light C. one white light D. one amber light KEY: D

[215]A list signal of one white light indicates that the vessel is ______. A. on an even keel

B. listing about 1° to the side the light is displayed on C. listing over 5°With the light displayed on the high side

D. listing，and the chutes should be directed to the side where the light is displayed KEY: B

[216]A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a ______. A. poor fix B. good fix

C. poor signal quality D. good signal quality KEY: B

[217]A low pressure annular preventer which is used to direct flow of kick fluids away from the rig floor is called a ______. A. dump valve B. deflector C. separator D. diverter KEY: D

[218]A major health hazard of the product tert-butylamine is that it ______. A. can be absorbed through the skin

B. causes irreversible damage to eye tissue

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C. is a very unstable product D. All of the above KEY: B

[219]A marine chemist issues gas free certificates and is certified by which organization? A. Mine Safety Appliance Association B. American Chemical Society C. Marine Chemists Association

D. National Fire Protection Association KEY: D

[220]A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?

A. The motion of the apparent sun is along the ecliptic. B. Measurement of time is along the celestial equator. C. The speed of the Earth's revolution is not constant. D. There are variations in the Earth's rotational speed. KEY: B

[221]A message by flashing light consists of the call，the identity，the text，and the ______. A. destination B. answer C. time D. ending KEY: D

[222]A mobile offshore drilling unit must display obstruction lights when it is on the waters over the Outer Continental Shelf and is ______. A. under tow

B. fixed to the seabed C. underway

D. All of the above KEY: B

[223]A mobile offshore drilling unit under tow is approaching a fog bank. When should fog signals be started?

A. When the towing vessel enters the fog B. When the drilling rig enters the fog

C. When the towing vessel can no longer be seen from the rig D. Immediately KEY: D

[224]A mobile offshore drilling unit will show the day-shape in DIAGRAM 10 to indicate that it is ______.

A. at anchor B. being towed C. aground D. drilling KEY: B

[225]A monkey fist is found on a ______. A. heaving line

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B. lead line C. manrope D. mooring line KEY: A

[226]A mooring line leading 45° to the keel，used to check forward or astern movement of a vessel，is called a ______. A. spring line B. warp line C. bow line D. breast line KEY: A

[227]A mooring line leading at nearly right angles to the keel is a ______. A. spring line B. bow line C. stern line D. breast line KEY: D

[228]A natural fiber rope can be ruined by dampness because it may ______. A. rot B. shrink C. stretch D. unlay KEY: A

[229]A navigator fixing a vessel's position by radar ______.

A. can use radar information from one object to fix the position B. should never use radar bearings

C. should only use radar bearings when the range exceeds the distance to the horizon D. must use information from targets forward of the beam KEY: A

[230]A negative metacentric height ______. A. should always be immediately corrected B. will always cause a vessel to capsize C. always results from off-center weights D. All of the above are correct KEY: A

[231]A petroleum liquid has a flash point of 85°F. This is a grade ______. A. B flammable liquid B. C flammable liquid C. D combustible liquid D. E combustible liquid KEY: C

[232]A pilot chart does NOT contain information about ______. A. average wind conditions B. tidal currents

C. magnetic variation

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D. average limits of field ice KEY: B

[233]A pilot vessel may continue to sound an identity signal if she is ______. A. aground B. at anchor

C. not under command D. being towed KEY: B

[234]A pilot vessel on pilotage duty at night will show sidelights and a stern light ______. A. when at anchor

B. only when making way

C. at any time when underway

D. only when the identifying lights are not being shown KEY: C

[235]A polyconic projection is based on a ______. A. plane tangent at one point

B. cylinder tangent at one parallel C. cone tangent at one parallel

D. series of cones tangent at selected parallels KEY: D

[236]A position obtained by applying ONLY your vessel's course and speed to a known position is a ______. A. fix

B. dead-reckoning position C. running fix

D. probable position KEY: B

[237]A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) ______. A. dead-reckoning position B. running fix

C. estimated position D. fix KEY: B

[238]A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) ______. A. estimated position

B. dead reckoning position C. fix

D. None of the above KEY: A

[239]A position that is obtained by using two or more intersecting lines of position taken at nearly the same time，is a(n) ______. A. fix

B. running fix

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C. estimated position

D. dead-reckoning position KEY: A

[240]A precaution you should take before bunkering is to ______ A. plug the vents

B. plug the sounding pipes C. plug the scuppers

D. close the lids on the vents KEY: C

[241]A predictable result of a vessel nearing a bank or edge of a channel is that the ______. A. stern is drawn to the bank as the bow sheers off B. bow sheers toward the bank

C. vessel continues in a straight line，but with greatly reduced maneuverability D. vessel will be drawn bodily into the bank unless the engines are stopped KEY: A

[242]A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the ______. A. atmospheric pressure B. wind speed

C. relative humidity and dew point D. wind chill factor KEY: C

[243]A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases?

A. In the lower level of the pumproom B. In the middle level of the pumproom C. In the upper level of the pumproom D. On the deck outside the pumproom KEY: D

[244]A quick and rapid motion of a ship in a seaway is an indication of a(n) ______. A. large GM

B. high center of gravity C. excessive free surface D. small GZ KEY: A

[245]A radar range to a small，charted object such as a light will provide a line of position in which form?

A. Straight line B. Arc

C. Parabola D. Hyperbola KEY: B

[246]A rapid rise or fall of the barometer indicates ______. A. heavy rain within six hours

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