更多"When a tornado moves over the water"的相关试题:
[单项选择]Wen a hurricane passes over colder water or land and loses its tropical characteristics，the storm becomes a（n）（）.
A. High pressure area
B. Extratropical low-pressure system
C. Tropical storm
D. Easterly wave
[单项选择]When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and （）.
A. slightly acidic
B. slightly alkaline
C. no salty
D. slightly bitter
[单项选择]A centrifugal pump may fail to deliver water when first started if the （）.
A. water seal pipe is plugged
B. pump is not primed
C. seal ring is improperly located
D. impeller is flooded
[单项选择]In （）, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
A. a flash generator
B. a flash evaporator
C. a vacuum boiling evaporator
D. a boiler
[单项选择]If you have to jump in the water when abandoning a vessel，your legs should be（）.
A. spread apart as far as possible
B. held as tightly against your chest as possible
C. in a kneeling position
D. extended straight down and crossed at the ankles
[单项选择]For the deepest water when rounding a bend in a river，you should navigate your vessel（）.
A. toward the inside of the bend
B. toward the outside of the bend
C. toward the center of the river just before the bend，then change course for the river's center after the bend
D. in the river's center
[单项选择]When（）clean ballast water from any vessel，an application shall be made to Harbor Authorities for approval.
A. discharging
B. recircling
C. loading
D. taking in
[单项选择]An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.
A. propeller hub
B. lignum vitae
C. shaft packing
D. labyrinth seal
[单项选择]What generally occurs when the land is cooler than the nearby water? （）
A. A land breeze
B. A sea breeze
C. A norther
D. A prevailing westerly
[单项选择]（）forms over land，most frequently during autumn and winter over low-lying land，especially if it is damp and marshy and in valleys on quiet nights with clear skies.
A. FRONTAL FOG
B. MIXING FOG
C. ADVECTION FOG
D. RADIATION FOG
[单项选择]When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to cut down the amount of cooling water needed
B. to prevent an excess amount of cooling water from being discharged to the bilges
C. to supply hot water to the evaporator for more economical operation
D. None of the above is tree
[单项选择]When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to decrease scale formation
B. for better cooling effect
C. for more economical purpose
D. to raise vacuum
[单项选择]EXCEPT when suffering from a head or chest injury a patient in shock should be placed in which position?（）.
A. Head up and feet down
B. Head down and feet up
C. Flat on back with head and feet elevated
D. Arms above the head
[单项选择]When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.
A. ahead direction
B. astern direction
C. right-handed
D. left-handed
[单项选择]When changing from a compass course to a true course you should apply（）.
A. variation
B. deviation
C. variation and deviation
D. a correction for the direction of current set
[单项选择]When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.
A. a junction with the preferred channel to the left
B. a sharp turn in the channel to the right
C. the starboard side of the channel
D. a wreck to be left on the vessel's port side
[单项选择]When viewed from above，the best position for the guy in relation to the boom is（）.
A. At a 45° angle
B. At right angles
C. 4 feet aft of the heel of the boom
D. Parallel to the boom
[单项选择]The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.
A. filter
B. hole
C. pollution
D. content
