更多"A barometer showing falling pressur"的相关试题:
[单项选择]A slow，gradual fall of the barometer indicates approaching（）.
A. gale force winds within 12 hours
B. blizzard conditions
C. deteriorating or unsettled weather
D. heavy，wind driven rain
[单项选择]A rapid rise or fall of the barometer indicates（）.
A. heavy rain within six hours
B. a decrease in wind velocity
C. a change in the present weather conditions
D. that fog will soon set in
[单项选择]As a high pressure system approaches，the barometer reading（）.
A. stays the same
B. falls
C. rises
D. falls rapidly
[单项选择]An aneroid barometer reading should be corrected for differences in（）.
A. elevation
B. temperature
C. wind speed
D. latitude
[单项选择]On what does the operation of an aneroid barometer depend?（）
A. Thin，metal，air tight cell
B. Curved tube containing alcohol
C. Column of mercury supported by atmospheric pressure
D. Expansion of mercury in a closed tube
[单项选择]An aneroid barometer is an instrument（）.
A. used to measure the speed of wind
B. in which the pressure of the air is measured
C. that tells which direction a storm is coming from
D. used to measure the height of waves
[单项选择]Prior to reading an aneroid barometer，you should tap the face lightly with your finger to（）.
A. expose any loose connections
B. demagnetize the metal elements
C. bring the pointer to its true position
D. contract and expand the glass face
[单项选择]A mercurial barometer at sea is subject to rapid variations in height (pumping) due to the pitch and roll of the vessel. To avoid this error，measurements of atmospheric pressure at sea are usually measured with a(n)（）.
A. syphon barometer
B. cistern barometer
C. aneroid barometer
D. fortin barometer
[单项选择]For an accurate barometer check，you would（）.
A. check it with a barometer on another vessel
B. take readings from several barometers and average them
C. check it with the barometer at the ship chandlery
D. check it against radio or National Weather Service reports of the immediate vicinity
[单项选择]The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）
A. join with
B. mix
C. be equal to
D. be constant
[单项选择]An aneroid barometer on a boat should always be（）.
A. located in an air-conditioned area
B. mounted in the passenger compartment
C. protected by a collision bulkhead
D. permanently mounted
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.
A. soluble state
B. solid state
C. liquefied state
D. inert state
[单项选择]（）indicates unstable weather.
A. The persence of cirrus clouds
B. The low-hanging stratus clouds
C. The altocumulus clouds
D. The massive cumulus clouds
[单项选择]The radiotelephone message that indicates a station is about to transmit a message concerning the safety of navigation or important meteorological warnings commences with（）.
A. TTT
B. The spoken word PAN
C. The spoken word SECURITE
D. XXX
[单项选择]Which radiotelephone signal indicates receipt of a distress message?（）
A. Roger wilco
B. Romeo，romeo，romeo
C. SOS acknowledged
D. Mayday roger
