USCG Navigation and Deck General Practice Test

10 sample Navigation and Deck General questions with answers

The same 10 on every visit. A related section is the closest match RegKnot found in the regulations and references; it is not part of the NMC’s answer key.

1. Question 1 · Master TV to Master Less than 500 Gross Registered Tons

   A flame screen __________.

   • A.prevents the passage of flammable vapors
   • B.permits the passage of vapor but not of flame (correct answer)
   • C.prevents inert gas from leaving a tank
   • D.permits vapors to exit but not enter a tank

   Answer: B. permits the passage of vapor but not of flame

   Related regulation: 46 CFR 151.03-25 ↗ — Flame screen

2. Question 2 · OUPV to Master Less than 100 Gross Registered Tons

   A magnetic compass card is marked in how many degrees?

   • A.90
   • B.180
   • C.360 (correct answer)
   • D.400

   Answer: C. 360

   Further reading: Bowditch Art.918 — Bowditch Ch.9 Compasses — 918. The Compass and the Binnacle

3. Question 3 · OUPV to Master or Mate Oceans or Near Coastal

   The two courses of action if the underwater hull is severely damaged are to plug the openings or to take which action?

   • A.Secure power to the compartment
   • B.Dewater the compartment
   • C.Ballast to maintain even keel
   • D.Establish and maintain flooding boundaries (correct answer)

   Answer: D. Establish and maintain flooding boundaries

   Related regulation: 46 CFR 28.580 ↗ — Unintentional flooding

4. Question 4 · Master TV to Master Less than 500 Gross Registered Tons

   The moisture equilibrium chart can be used to determine which item?

   • A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists
   • B.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
   • C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo
   • D.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity (correct answer)

   Answer: D. Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity

   Further reading: Bowditch Art.4107 — Bowditch Ch.41 Weather Observations — 4107. Humidity

5. Question 5 · OUPV to Master Near Coastal

   Which portable fire extinguisher is required just outside the exit of the propulsion machinery space of a 75-ton passenger vessel?

   • A.One B-II, C-II or post 2017 One 40-B:C extinguisher (correct answer)
   • B.One A-II or post 2017 One 2-A extinguisher
   • C.One B-I or post 2017 One 10-B extinguisher
   • D.None of the above

   Answer: A. One B-II, C-II or post 2017 One 40-B:C extinguisher

   Related regulation: 46 CFR 34.50-10 — Location, number, and installation of fire extinguishers—TB/ALL

6. Question 6 · OUPV to Master Near Coastal

   On a small passenger vessel, 58 feet in length, carrying 52 passengers the fire pump shall have a minimum pumping capacity of how many gallons per minute?

   • A.10 gallons per minute
   • B.100 gallons per minute
   • C.25 gallons per minute
   • D.50 gallons per minute (correct answer)

   Answer: D. 50 gallons per minute

   Related regulation: 46 CFR 169.559 ↗ — Fire pumps

7. Question 7 · OUPV to Master or Mate Less than 200 GRT

   According to the Lifesaving regulations in Subchapter W, fire and abandon ship drills must be held within 24 hours of leaving port if the percentage of the crew that has not participated in drills aboard that particular vessel in the prior month exceeds which percentage?

   • A.5%
   • B.10%
   • C.25% (correct answer)
   • D.40%

   Answer: C. 25%

   Related regulation: 46 CFR 199.180 — Training and drills

8. Question 8 · OUPV to Master or Mate Oceans or Near Coastal

   On a sea going towing vessel of 150 gross tons, there are six (6) seamen in the deck crew. How many certificated able seamen are required if the voyage is over 600 miles?

   • A.1
   • B.2
   • C.3
   • D.4 (correct answer)

   Answer: D. 4

   Related regulation: 46 USC 8702 — Certain crew requirements

9. Question 9 · Master TV to Master Less than 500 Gross Registered Tons

   Maritime Administration personnel may be allowed in the pilothouse and on the navigation bridge. Who is responsible for these personnel while in these areas of the vessel?

   • A.The Master of the vessel (correct answer)
   • B.The most senior person present from the Maritime Administration
   • C.The Navigational Officer
   • D.The Chief Officer

   Answer: A. The Master of the vessel

   Related regulation: 46 CFR 131.915 ↗ — Persons allowed in pilothouse and on navigational bridge

10. Question 10 · OUPV to Master or Mate Less than 200 GRT

    Which agency must approve the safety equipment on board inspected vessels?

    • A.The Safety Standards Bureau
    • B.The Occupational Safety and Health Administration (OSHA)
    • C.The U.S. Coast Guard (correct answer)
    • D.The National Safety Council

    Answer: C. The U.S. Coast Guard

    Related regulation: 33 CFR 159.97 ↗ — Safety: inspected vessels

Exams these questions come from

Choose one when you start the quiz. A question can appear in more than one exam, so these add up to more than 499.

• Master Less than 100 GRT to …94 questions
• Master TV to Master Less than 500 Gross Registered Tons69 questions
• OUPV to Master or Mate Oceans or Near Coastal68 questions
• Second Mate to Master68 questions
• OUPV to Master or Mate Less than 200 GRT66 questions
• Master Less than 100 GRT to Master or …50 questions
• OUPV to Master Less than 100 Gross Registered Tons49 questions
• OUPV to Master Near Coastal48 questions

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