更多"A light having characteristics whic"的相关试题:
[单项选择]A mooring buoy，if lighted，shows which color light?（）
A. Yellow
B. White
C. Blue
D. Any color except red or green
[单项选择]A towing light is a yellow light having the same characteristics as a(n)（）
A. special flashing light
B. anchor light
C. sternlight
D. masthead light
[单项选择]Which statement concerning Montauk Point Light is TRUE（）.
A. The light comes on at sunset
B. There is an emergency light if the main light is extinguished
C. The height of the light is 24 feet
D. The tower is painted with black and white stripes
[单项选择]Which term describes piston pins having bearing surfaces in both the piston bosses and connecting rod eye?（）
A. Stationary
B. Full floating
C. Semi-floating
D. Free rolling
[单项选择]Which word indicates color variation in the characteristics of a light?（）
A. Opposing
B. Changing
C. Reversing
D. Alternating
[单项选择]The height of a light is measured from which reference plane?（）
A. Mean low water
B. Mean high water
C. Average water level
D. Geographical sea level
[单项选择]An occulting light is one in which （）.
A. the period of darkness exceeds the period of light
B. there is only a partial eclipse of the light
C. the periods of light and darkness are equal
D. the period of light exceeds the period of darkness
[单项选择]The maximum distance at which a light may be seen under the existing visibility conditions is called（）.
A. nominal range
B. luminous range
C. charted range
D. geographic range
[单项选择]A flashing light is a light that（）.
A. flashes at regular intervals at a frequency of 120 flashes or more per minute
B. is yellow in color
C. is visible over an arc of the horizon of not less than 180°nor more than 225°
D. All of the above
[单项选择]A vessel showing a green light over a white light in a vertical line above the level of the sidelights is（）.
A. engaged in underwater construction
B. under sail and power
C. a pilot vessel
D. trawling
[单项选择]A vessel showing a yellow light over a white light at night is a vessel（）.
A. engaged in piloting
B. towing astern
C. engaged in fishing
D. in distress
[单项选择]A light that has a light period shorter than its dark period is described as（）.
A. flashing
B. pulsating
C. occulting
D. alternating
[单项选择]Which of the following is not a factor which can interfere with the pulse of sound and cause a variation the depth reading?（）
A. salinity
B. temperature
C. the hydrostatic pressure
D. Vessel’s speed
[单项选择]After having activated the emergency position indicating radio beacon，you should（）.
A. turn it off for 5 minutes every half-hour
B. turn it off and on at 5 minute intervals
C. turn it off during daylight hours
D. leave it on continuously
[单项选择]A ship having continuous closely spaced transverse strength members is（）.
A. longitudinally framed
B. transversely framed
C. cellular framed
D. web framed
[单项选择]A vessel having continuous closely spaced transverse strength members is（）.
A. longitudinally framed
B. transversely framed
C. cellular framed
D. web framed
