更多"The luminous range of a light takes"的相关试题:
[单项选择]The range of a light on Admiralty Charts is normally the（）.
A. nominal range
B. luminous range
C. geographical range
D. visible range
[单项选择]The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen（）.
A. under existing visibility conditions
B. under perfect visibility
C. with ten miles visibility
D. with fifteen miles visibility
[单项选择]A message by flashing light consists of the call，the identity，the ending，and the（）.
A. reply
B. text
C. time
D. answer
[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 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]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]It takes ages（）
A. for doing the shopping
B. to do the shopping
C. does the shopping
[单项选择]Since the burning or combustion takes place within the engine itself, the engine is known as （）.
A. a fire -tube boiler
B. an internal combustion engine
C. an external combustion engine
D. an internal combustion generator
[单项选择]The supercharger takes air out of the surrounding atmosphere and then feeds it to the engine’s （）.
A. inlet valves
B. exhaust valves
C. emergency valves
D. run-return valves
[单项选择]Horton Point Light（）.
A. is 14 feet above sea level
B. has a fixed green light
C. is shown from a white square tower
D. is synchronized with a radio beacon
[单项选择]A towing light（）.
A. flashes at regular intervals of 50-70 flashes per minute
B. is yellow in color
C. shows an unbroken light over an arc of the horizon of not less than 180°nor more than 225°
D. All of the above
[单项选择]An alternating light（）.
A. shows a light with varying lengths of the lighted period
B. shows a light that changes color
C. marks an alternate lesser-used channel
D. is used as a replacement for another light
[单项选择]Which of the listed methods of heat transfer takes place when two substances of different temperatures are in physical contact with each other?（）
A. Radiation
B. Conduction
C. Convection
D. Each of the above
[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
