Q171 Practice Quiz

1. Wind speed
2. Temperature
3. Rain in inches
4. Barometric pressure  ← correct

1. 20 to 30 knots  ← correct
2. 40 to 50 knots
3. 5 to 10 knots
4. Over 60 knots

1. Gale force winds from the north
2. An unusually long ocean swell  ← correct
3. Steep, short-period waves and light wind
4. Thunderstorms and higher than usual humidity

1. Cyclonic spirals
2. Spiral rainbands
3. Wall clouds  ← correct
4. Funnel clouds

1. The amount of cloud cover forecasted
2. The wind speed forecasted  ← correct
3. The wave heights forecasted
4. The amount of rain forecasted

1. The weather station
2. The broadcasting station
3. Sea level  ← correct
4. Washington, D.C.

1. Inches of mercury and centimeters
2. Feet of mercury and millibars
3. Inches of mercury and millibars  ← correct
4. Inches of mercury and millimeters

1. It signifies middle or high-altitude clouds
2. It means rainy clouds  ← correct
3. It means sheet or layer clouds
4. It means great vertical development

1. Rain expected
2. Hurricane weather
3. Fog setting in
4. Fair weather  ← correct

1. Cumulonimbus  ← correct
2. Stratus
3. Cirrus
4. Altostratus

1. Clearing weather, possibly accompanied by high winds  ← correct
2. Deteriorating weather with rain or snow
3. Heavy rain or severe thundershowers
4. Clear weather with no wind, but the possibility of rain or snow within 24 hours

1. The reading rises  ← correct
2. The reading falls
3. The reading falls rapidly
4. The reading stays the same

1. air being warmed above the dew point
2. warm moist air being blown over a colder surface  ← correct
3. a rapid cooling of the air near the surface of the Earth at night
4. saturation of cold air by rain

1. temperature increases
2. wind speed increases
3. wind direction changes
4. All of the above  ← correct

1. It serves no significant purpose
2. It is used to identify the characteristics of the light
3. It indicates the limits of the navigable channel
4. It indicates a danger area  ← correct

1. 1.0 second duration
2. 1.5 seconds duration
3. 2.0 seconds duration  ← correct
4. 3.0 seconds duration

1. General information  ← correct
2. Danger
3. An exclusion area
4. A controlled area

1. A flashing red light showing a group of three flashes
2. A quick-flashing green light
3. A flashing white light showing a group of two flashes  ← correct
4. A quick-flashing red light

1. They are marked in 6-inch figures with retro-reflective material
2. The numbers increase with the even numbers to starboard  ← correct
3. The numbers are the same as their Light List number
4. The numbers decrease with the odd numbers to starboard

1. Spoil grounds
2. The preferred channel  ← correct
3. Fishing areas
4. An isolated danger

1. They may show a quick-flashing, Q(9)15s, white light
2. They must show a composite group-flashing, Fl(2 + 1), green light
3. They may show a composite group-flashing, Fl(2 + 1), red light
4. They may show a white Morse (A) light  ← correct

1. Yellow and black vertically striped buoy
2. White and international orange buoy
3. Yellow buoy  ← correct
4. White buoy with a green top

1. The glare from background lighting
2. The elevation of the light
3. The existing visibility conditions  ← correct
4. The observer's height of eye

1. 9.0 miles  ← correct
2. 10.0 miles
3. 11.0 miles
4. 12.0 miles

1. Army Corps of Engineers
2. National Ocean Service
3. United States Coast Guard  ← correct
4. Oceanographic Office

1. 3°E  ← correct
2. 9°E
3. 3°W
4. 9°W

1. 5°E
2. 5°W
3. 6°E
4. 6°W  ← correct

1. 2 1/2 hours
2. 3 1/2 hours
3. 6 1/4 hours
4. 12 1/2 hours  ← correct

1. One
2. Two  ← correct
3. Three
4. Four

This question is asked against Coast Guard illustration D058NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. 0.2kts at 335°T
2. 0.1kts at 104°T  ← correct
3. 0.1kts at 280°T
4. 0.2kts at 172°T

This question is asked against Coast Guard illustration D063NG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.

1. 1559
2. 1459  ← correct
3. 1458
4. 1500

1. Stand
2. Vector direction
3. Drift
4. Set  ← correct

1. The difference between the heights of high and low tide  ← correct
2. The duration of time between high and low tide
3. The maximum depth of the water at high tide
4. The distance the tide moves out from the shore

1. 3°27'E
2. 3°27'W
3. 3°45'E
4. 4°03'E  ← correct

1. Compass error is the difference between true and magnetic heading
2. Compass error is variation plus compass course
3. Compass error is the sum of variation and deviation  ← correct
4. Compass error is equal to deviation minus variation

1. Electrical wiring
2. Radio
3. Iron pipe
4. All of the above  ← correct

1. 136°T
2. 128°T
3. 170°T  ← correct
4. 162°T

1. 291°T  ← correct
2. 296°T
3. 299°T
4. 313°T

1. 56 characters
2. 64 characters
3. 128 characters
4. 158 characters  ← correct

1. Vessel's type
2. Navigational status
3. Vessel's course
4. All of the above  ← correct

1. 10 meters  ← correct
2. 20 meters
3. 50 meters
4. 92 meters

1. A shallow depth reading
2. A zero-depth reading
3. No depth reading
4. Two depth readings  ← correct

1. Revised edition
2. New edition  ← correct
3. First edition
4. Reprint

1. The object is a hazard to vessels drawing 20 feet draft
2. The object is always visible
3. The position is approximate or doubtful
4. The object is underwater or floating  ← correct

1. A report of a ship in distress in mid-ocean
2. The presence of a large unwieldy tow in congested offshore water
3. Extinguishment of Robbins Reef Light in New York City's Upper Bay  ← correct
4. Unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters)

1. 0125
2. 0131  ← correct
3. 0122
4. 0134

1. 297°T
2. 300°T
3. 303°T
4. 307°T  ← correct

1. 209°T
2. 217°T
3. 222°T  ← correct
4. 232°T

1. Stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away
2. Turn away from the whale and leave at full speed
3. Turn away from the whale and leave at slow speed  ← correct
4. Slow to bare steerageway until the whale swims away

1. 200
2. 300
3. 400
4. 500  ← correct