Barge Supervisor (MODU) Practice Test

Runs the marine side of a drilling rig: ballast, mooring, stability and deck crews, under the OIM. Stability questions built on the NMC sample rigs (DEEP DRILLER, COASTAL DRILLER) need their reference book, so they are left out here. Coast Guard exam code MODU02.

119 real questions from the Coast Guard National Maritime Center's public sample exams, free. Rules of the Road needs 90%. Every other module needs 70%.

Passing score: Coast Guard pass marks module by module, and the retest rules

What's free: daily rounds, the Brig, the drills and the Pass Meter, for every license. Your first module test is free too. After that, the full Exam Room is $19, once. No subscription.

What's on the test

10 sample questions

1. For the purpose of the Inland Navigation Rules, the term "Inland Waters" includes which of the following?

   • A.The coastline of the United States out to one mile offshore
   • B.The Great Lakes on the United States side of the boundary
   • C.The waters surrounding any islands of the U.S.
   • D.Any lakes within state boundaries
   Show answer

   B. The Great Lakes on the United States side of the boundary

   Q100, Rules of the Road: International & Inland

2. What shall be conducted during a fire and boat drill?

   • A.All watertight doors in the vicinity of the drill shall be operated.
   • B.Fire pumps shall be started and all exterior outlets opened.
   • C.All lifeboat equipment shall be examined.
   • D.All of the above
   Show answer

   A. All watertight doors in the vicinity of the drill shall be operated.

   Q352, Navigation & Deck General / Safety

3. On offshore drilling units, notification shall be given to the Coast Guard of a casualty if a person is injured and unable to perform routine duties for __________.

   • A.any amount of time
   • B.more than 24 hours
   • C.more than 36 hours
   • D.more than 72 hours
   Show answer

   A. any amount of time

   Q430, OIM Deck General / Safety

4. A law enforcement vessel patrolling a marine regatta may exhibit a flashing blue light or which of the following alternates?

   • A.two amber lights in a horizontal line
   • B.a fixed green light over a red flashing light
   • C.a high intensity flashing white light (strobe)
   • D.an alternately flashing red and yellow light
   Show answer

   D. an alternately flashing red and yellow light

   Q100, Rules of the Road: International & Inland

5. How is the external flotation bladder of an immersion suit inflated?

   • A.It is inflated by a small CO2 bottle that is manually tripped.
   • B.It is inflated by a small CO2 bottle that is automatically tripped when the front zipper is at the top of the zipper track.
   • C.It is inflated by blowing through an inflation tube.
   • D.It inflates by sea water bleeding into the flotation bladder and reacting with a chemical therein.
   Show answer

   C. It is inflated by blowing through an inflation tube.

   Q445, Lifeboat Operator

6. What is the effect of high concentrations of H2S gas on personnel?

   • A.cause dizziness
   • B.paralyze your breathing system
   • C.cause eye inflammation
   • D.cause involuntary muscle contractions
   Show answer

   B. paralyze your breathing system

   Q431, OIM Unrestricted

7. A commercial vessel engaged in public safety activities may display a(n) identity light(s). Which of the following is appropriate for these activities?

   • A.alternately flashing red and yellow light
   • B.flashing yellow light
   • C.alternately flashing blue and red light
   • D.flashing blue light
   Show answer

   A. alternately flashing red and yellow light

   Q100, Rules of the Road: International & Inland

8. A person reports to you with a fishhook in his thumb, what procedure should you use to remove it?

   • A.Have a surgeon remove it
   • B.Cut the skin from around the hook
   • C.Push the barb through, cut it off, then remove the hook
   • D.Pull it out with pliers
   Show answer

   C. Push the barb through, cut it off, then remove the hook

   Q447, Lifeboat Operator Limited

9. Survival practice in the mooring system is to slack off the tensions on the leeward side and __________.

   • A.deballast the unit to transit draft
   • B.tighten the anchor buoys on the leeward side anchors
   • C.adjust as evenly as practical the windward tensions
   • D.release the anchors on the windward side
   Show answer

   C. adjust as evenly as practical the windward tensions

   Q431, OIM Unrestricted

10. What is a "vessel restricted in her ability to maneuver"?

    • A.A large tanker that is being towed as a dead ship to dry dock
    • B.A deep-draft vessel that can only navigate in a dredged channel
    • C.A vessel fishing with a bottom trawl that must remain on course
    • D.A vessel laying revetment mats to provide bank protection along a channel
    Show answer

    D. A vessel laying revetment mats to provide bank protection along a channel

    Q100, Rules of the Road: International & Inland

What the study guide does

• Short daily rounds of 10 questions, with a streak.
• Practice tests built like the real one, scored with the real pass marks (first one free, then $19 once for the full Exam Room).
• The Brig: questions you miss come back until you get them right twice.
• Pass Meter: your chance of passing every module if you sat it today, worked out from your own answers.
• Lights, shapes and sound signal drills (Rules 21-35).