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

USCG General Navigation (Set 38)

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Question 1 of 30

The doldrums are characterized by __________.

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30 MCQs

#1 The doldrums are characterized by __________. #2 In the doldrums you can expect __________. #3 The prevailing winds in the band of latitude from approximately 5°N to 30°N are the __________. #4 The consistent winds blowing from the horse latitudes to the doldrums are called the __________. #5 During the winter months, the southeast trade winds are __________. #6 The southeast trade winds actually blow toward the __________. #7 The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the __________. #8 The horse latitudes are characterized by __________. #9 The "horse latitudes" are regions of __________. #10 While taking weather observations, you determine that the wind is blowing from the northeast. You would record the wind direction in the weather log as __________. #11 When recording the wind direction in the weather log, you would report the __________. #12 Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind? #13 Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind? #14 Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. The true direction and speed of the wind are __________. #15 The probability of a sudden wind may be foretold by __________. #16 A cloud of marked vertical development (often anvil-shaped) would be classified as __________. #17 On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead __________. #18 Which type of cloud formation should be of immediate concern to small craft operators? #19 All of the following are associated with cumulonimbus clouds EXCEPT __________. #20 Cumulonimbus clouds are formed by __________. #21 Which type of cloud is the classic "thunderhead"? #22 A sign of thunderstorm development is a cumulus cloud __________. #23 Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are called __________. #24 The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions? #25 The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________. #26 Clouds with the prefix "nimbo" in their name __________. #27 Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes, are called __________. #28 Altocumulus clouds are defined as __________. #29 If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________. #30 The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.

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