Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG General Navigation (Set 40)

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Question 1 of 30

The fog most commonly encountered at sea is called __________.

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30 MCQs

#1 The fog most commonly encountered at sea is called __________. #2 The fog produced by warm moist air passing over a cold surface is called __________. #3 How is an occluded front represented on a weather map? #4 Your vessel is enroute from Japan to Seattle and is located at position I on the weather map in illustration D013NG below. You should experience which weather condition? #5 If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you? #6 Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________. #7 Which of the symbols shown in illustration D018NG below represents a warm front? #8 Which of the symbols shown in illustration D018NG below represents an occluded front? #9 On a working copy of a weather map, a cold front is represented by what color line? #10 What type of clouds are associated with a cold front? #11 On a working copy of a weather map what color is the line that represents a stationary front? #12 What weather change accompanies the passage of a cold front in the Northern Hemisphere? #13 A cold front moving in from the northwest can produce __________. #14 On a working copy of a weather map what color is the line that represents a warm front? #15 Which type of frontal passage is associated with a relatively narrow band of precipitation? #16 Which weather change accompanies the passage of a cold front in the Northern Hemisphere? #17 Which condition will occur after a cold front passes? #18 Which of the following typically happens to the barometric pressure after a cold front passes? #19 Which of the following statements concerning frontal movements is TRUE? #20 Which statement is TRUE when comparing cold and warm fronts? #21 Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours. You should __________. #22 When crossing a front how do isobars tend to change? #23 A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________. #24 What happens to the barometric pressure after a cold front passes? #25 How does the temperature change with the passage of an occluded front? #26 As a cold front passes how do the pressure and the winds change? #27 Which of the following causes the development of an occluded front? #28 Which type of front forms when a cold front overtakes and forces a warm front upwards? #29 In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies, indicate the passage of a(n) __________. #30 When does a weather front exist?

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