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USCG Offshore Installation Manager (OIM) Practice Test

288 Offshore Installation Manager (OIM) questions from the National Maritime Center’s published sample exams for Mobile Offshore Drilling Units, each with the NMC’s answer key. Questions that need an illustration, a chart or a reference book are left out.

172 of them come with the closest regulation or reference section, shown with the answer.

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10 sample Offshore Installation Manager (OIM) questions with answers

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  1. Question 1 · Mobile Offshore Drilling Units

    The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). What is the new LCG if the entire contents of drill water tanks 6 and 7 are discharged?

    • A.118.20 feet
    • B.119.44 feet
    • C.120.10 feet (correct answer)
    • D.121.36 feet

    Answer: C. 120.10 feet

    Related regulation: NVIC 05-86 Encl.1 — Voluntary Standards for U.S. Uninspected Commercial Fishing Vessels — Enclosure (1)

  2. Question 2 · Mobile Offshore Drilling Units

    When should the emergency position-indicating radio beacon be activated after abandoning a MODU?

    • A.After one hour
    • B.Immediately (correct answer)
    • C.Only after sunset
    • D.Only when another vessel is in sight

    Answer: B. Immediately

    Related regulation: IMO HSC Code MSC.97(73) Ch.14 — IMO HSC Code Chapter 14 — RADIOCOMMUNICATIONS

  3. Question 3 · Mobile Offshore Drilling Units

    How long shall the Oil Record Book be maintained on a vessel engaged in coastwise trade?

    • A.12 months
    • B.24 months
    • C.36 months (correct answer)
    • D.48 months

    Answer: C. 36 months

    Related regulation: NVIC 08-83 Encl.2 — Guidance for Compliance with Annex I of the International Convention for the Prevention of Pollution from Ships, 1973, as Modified by the Protocol of 1978 Relating Thereto (MARPOL 73/78) — Enclosure (2)

  4. Question 4 · Mobile Offshore Drilling Units

    When a semisubmersible rig under tow veers from side to side on its tow line, the best way of controlling the action is to __________.

    • A.trim by the bow
    • B.adjust the length of the towing bridle
    • C.play out stern anchor chain
    • D.trim by the stern (correct answer)

    Answer: D. trim by the stern

    Related regulation: 46 CFR 143.225 — Control and monitoring requirements

  5. Question 5 · Mobile Offshore Drilling Units

    A semisubmersible, while floating level, displaces 20,000 long tons. LCB is 3.0 feet forward of amidships. Bulk, weighing 300 long tons, is placed in P-tanks located 40 feet aft of amidships. What is the new LCG?

    • A.3.64 feet forward of amidships
    • B.2.45 feet forward of amidships
    • C.2.36 feet forward of amidships (correct answer)
    • D.0.55 foot forward of amidships

    Answer: C. 2.36 feet forward of amidships

    Related regulation: NVIC 05-86 Encl.1 — Voluntary Standards for U.S. Uninspected Commercial Fishing Vessels — Enclosure (1)

  6. Question 6 · Mobile Offshore Drilling Units

    The DEEP DRILLER's lightweight is the condition prior to loading __________.

    • A.deck load and lower-hull liquids
    • B.deck load, lower-hull liquids, and external loads
    • C.deck load
    • D.deck load, lower-hull liquids, external loads, and deploying anchors (correct answer)

    Answer: D. deck load, lower-hull liquids, external loads, and deploying anchors

    Related regulation: 46 CFR 42.20-9 ↗ — Initial conditions of loading

  7. Question 7 · Mobile Offshore Drilling Units

    Why are symmetric mooring patterns frequently used to keep MODU's on station?

    • A.Environmental forces will probably vary in direction during the time the MODU is on station. (correct answer)
    • B.Governmental regulations require this mooring pattern unless an exemption is issued.
    • C.All lines contribute to the holding power of the mooring system.
    • D.Environmental forces will probably come from the same direction during the time the MODU is on station.

    Answer: A. Environmental forces will probably vary in direction during the time the MODU is on station.

    Related regulation: USCG MSM 16000.76 Ch.2 — Marine Safety — Outer Continental Shelf Activities — Ch.2 Procedures Applicable to MODUs (U.S.)

  8. Question 8 · Mobile Offshore Drilling Units

    A qualified person must be assigned as the second in command of a lifeboat on a MODU if the lifeboat has a capacity of more than __________.

    • A.20 persons
    • B.30 persons
    • C.40 persons (correct answer)
    • D.50 persons

    Answer: C. 40 persons

    Related regulation: USCG MSM 16000.76 Ch.2 — Marine Safety — Outer Continental Shelf Activities — Ch.2 Procedures Applicable to MODUs (U.S.)

  9. Question 9 · Mobile Offshore Drilling Units

    In a semisubmersible MODU, the columns contain void spaces above the waterline that are used principally for __________.

    • A.reserve buoyancy (correct answer)
    • B.machinery
    • C.elevators
    • D.equipment storage

    Answer: A. reserve buoyancy

    Related regulation: IMO HSC Code MSC.97(73) Ch.2 — IMO HSC Code Chapter 2 — BUOYANCY, STABILITY AND SUBDIVISION

  10. Question 10 · Mobile Offshore Drilling Units

    The muster list shows each rig hand's muster station, his duties during abandonment, basic instructions, and __________.

    • A.the time each weekly drill will be held
    • B.all emergency signals (correct answer)
    • C.work schedule
    • D.instructions for lowering the survival craft

    Answer: B. all emergency signals

    Related regulation: 46 CFR 108.901 ↗ — Muster list and emergency instructions

Exams these questions come from

  • Mobile Offshore Drilling Units288 questions

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The questions and answer keys are from the U.S. Coast Guard National Maritime Center’s published sample exams. RegKnot is not affiliated with the U.S. Coast Guard or the National Maritime Center. A practice score does not predict your exam result; check the NMC for current exam requirements.