National Maritime Center

Transcription

1 National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 12

2 Choose the best answer to the following Multiple Choice Questions. 1. To have the ultimate authority for a mobile offshore drilling unit while it is under tow, a rig mover must o o o (A) hold an Able Seaman endorsement and be designated as the person in charge of the rig (B) be certified by the Minerals Management Service and be designated as the person in charge of the rig (C) be certified by an approved classification society and be designated as the person in charge of the rig (D) hold an endorsement as Offshore Installation Manager and be held as the person in charge of the rig 2. To determine the number of industrial personnel allowed on a mobile offshore drilling unit, you should check the (A) Certificate of Inspection o (B) Safety of Life at Sea Certificate o (C) Operations Manual o (D) Muster List ("Station Bill") 3. Curve B in the Design Limits of Legs Chart of the Coastal Driller Operating Manual, shows the operating limits during normal transit based on o (A) variable load o (B) environmental load (C) leg strength o (D) load line 4. What class of bulkhead is required around the galley on a MODU? (A) Class A o (B) Class B o (C) Class C o (D) Class D Page 2 of 12

3 5. The COASTAL DRILLER is experiencing a single amplitude roll angle of 3 degrees and a roll period of 10 seconds. What is the maximum water depth that can be used for going on location? o (A) 45 feet (B) 95 feet o (C) 145 feet o (D) 245 feet 6. The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). If the contents of #6 and #7 Drill Water Tanks are discharged, what is the new longitudinal free surface correction? (A) 1.63 feet o (B) 2.14 feet o (C) 2.24 feet o (D) 2.38 feet 7. The COASTAL DRILLER, in transit with winds expected to exceed 70 knots, must lower the legs so that the can tips are (A) 60.5 feet below the hull o (B) 48.5 feet below the hull o (C) 11.6 feet below the hull o (D) 1.2 feet below the hull 8. While on a normal tow, the COASTAL DRILLER is threatened with the approach of a severe storm. Including the time required to place the generators on-line, the approximate time required to lower the legs from a TOC (tip-of-can) position of 1.20 feet to feet is o (A) 8 minutes o (B) 32 minutes o (C) 47 minutes (D) 55 minutes Page 3 of 12

4 9. Because there is a possibility of fuel oil being discharged overboard from a full fuel oil tank, it is decided to transfer 25 kips from tank 14 to tank 13. See COASTAL DRILLER Sample Load Form Number 1 (Rig Move). What would be the change in vertical moments with this transfer? o (A) 81 ft-kips increase o (B) 47 ft-kips decrease o (C) 31 ft-kips increase (D) 26 ft-kips decrease 10. The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). What is the value of KML if the entire contents of drill water tanks 6 and 7 are discharged? o (A) feet o (B) feet (C) feet o (D) feet 11. What is the sounding in drill water tank #1 for the COASTAL DRILLER, if the weight of drill water in the tank is kips? o (A) 14.5 feet o (B) 15.0 feet (C) 15.5 feet o (D) 16.0 feet 12. What information must be available to use the Allowable Wind and Wave Charts for the COASTAL DRILLER? o (A) Specific gravity of the sea water o (B) Overturning moment o (C) Soil conditions (D) Water depth 13. When preloading the COASTAL DRILLER, the maximum total weight shall not exceed (A) 21,497 kips o (B) 21,297 kips o (C) 17,700 kips o (D) 14,400 kips Page 4 of 12

5 14. A MODU lists and trims about the o (A) center of gravity (B) center of flotation o (C) center of buoyancy o (D) centroid of the underwater volume 15. For a jack-up, the angle of maximum stability corresponds approximately to the angle of o (A) loll (B) deck edge immersion o (C) downflooding o (D) the load line 16. The intact volume above the waterline of a floating MODU is (A) gross tonnage o (B) reserve buoyancy o (C) net tonnage o (D) displacement volume 17. The COASTAL DRILLER has a trim of 2.13 feet by the stern. The draft in sea water at the forward draft marks is observed to be 8.0 feet. The KMT is (A) feet o (B) feet o (C) feet o (D) feet 18. Until a change to lightweight has been approved, the weights and center of gravity locations for the changes to lightweight shown in the permanent record for the Deep Driller are treated as (A) variable load o (B) basic load o (C) fixed load o (D) gross tonnage Page 5 of 12

6 19. On the COASTAL DRILLER, the level of water in each of two pump bilge pits is monitored by (A) hydrostatic alarm switches o (B) low and high level alarms o (C) visual sight gages o (D) OSS units (overflow sequence selector units) 20. On offshore drilling units fitted with fixed CO2 systems, the system must discharge at least 85 percent of the required amount of CO2 within o (A) 1 minute (B) 2 minutes o (C) 3 minutes o (D) 4 minutes 21. While preloading, the COASTAL DRILLER has a total weight of 21,401 kips. The LM are 2,560,416 ft-kips, and the TM are 6,206 ft-kips. What is the bow leg reaction? (A) 7,099 kips o (B) 7,134 kips o (C) 7,151 kips o (D) 7,203 kips 22. On the COASTAL DRILLER, when afloat, oily bilge discharge should be pumped through the o (A) raw water header (B) skimmer tanks o (C) dump valves o (D) overboard discharge 23. Which of the following items should all MODU personnel be familiar with? o (A) maintenance schedule o (B) navigational systems (C) boarding and operating procedures o (D) fuel consumption rates Page 6 of 12

7 24. In MODU construction, beams are transverse girders which provide support to (A) decks o (B) bulkheads o (C) vertical frames o (D) deckhouse structures 25. Why is electrical power preferred over mechanical power for driving heavy machinery on drilling rigs? (A) More flexible o (B) More fuel efficient o (C) Less maintenance o (D) Lighter 26. Annual inspection of MODU cranes shall be conducted by o (A) the crane operator o (B) U.S. Coast Guard o (C) the person in charge (D) a qualified inspector 27. The deck plating on a MODU is supported primarily by deck longitudinals and deck o (A) stanchions o (B) frames (C) beams o (D) girders 28. While underway in a field move with the lower hulls awash, a semisubmersible has a maximum allowable KG of feet; KMT is and KML is The KGT is and KGL is What is the margin on the maximum allowable KG? o (A) 1.43 feet (B) 7.56 feet o (C) 7.80 feet o (D) 8.99 feet Page 7 of 12

8 29. 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? o (A) feet o (B) feet (C) feet o (D) feet 30. Beyond the area of state ownership in the U.S. outer continental shelf, the right to drill is controlled by the (A) Minerals Management Service o (B) U.S. Corps of Engineers o (C) American Bureau of Shipping o (D) U.S. Coast Guard 31. What longitudinal moments are created when kips of fresh water is placed in the COASTAL DRILLER's #1 drill water tank? o (A) 1,729 ft-kips o (B) 1,739 ft-kips o (C) 1,749 ft-kips (D) 1,759 ft-kips 32. For a MODU with transverse inclination, an increase in GMT causes o (A) list to increase (B) list to decrease o (C) list to stabilize at an angle of loll o (D) trim to decrease 33. When cargo aboard a jack-up in transit becomes adrift, the tow vessel should be asked to (A) turn into the seas o (B) turn to be parallel to the seas o (C) increase speed o (D) reduce speed Page 8 of 12

9 34. A survival craft being used to pick up a person who has fallen overboard from a MODU should approach the person o (A) under oars o (B) with the wind o (C) at a high rate of speed (D) against the wind 35. The procedure of strengthening damaged structures on a MODU by using wood or steel is called o (A) battening o (B) bracing (C) shoring o (D) blocking 36. In securing deck loads for an ocean tow, drill pipe should be o (A) galvanized to protect against corrosion o (B) held in place with heavy materials such as spare pendant wire (C) provided with bulwarks at both ends of their bays o (D) limited to no more than five courses high 37. Among the possible causes of unexpected rapid increasing inclination of the floating COASTAL DRILLER is o (A) consumption of on board liquids o (B) external environmental forces (C) flooding due to hull damage o (D) miscalculation of loads 38. Repair of structures on a MODU in the vicinity of liquid mud handling areas presents what possible hazard? o (A) Toxic gasses may be present. (B) Flammable gasses may be present. o (C) Liquid muds may flood adjoining spaces. o (D) An oxygen-deficient atmosphere may be present. Page 9 of 12

10 39. The longitudinal location of the center of flotation for the COASTAL DRILLER has a value of o (A) feet AF0 o (B) feet AF0 (C) feet AF0 o (D) feet AF0 40. The maximum combined drilling load for the COASTAL DRILLER consisting of the combined hook, rotary, setback, and conductor tension, shall not exceed o (A) 750 kips o (B) 500 kips o (C) 450 kips (D) 1000 kips 41. What type of test determines the pressure at which the formation immediately below the last set casing will take fluid? o (A) Drill stem o (B) Conductor o (C) Production (D) Leak-off 42. The COASTAL DRILLER, while in transit, expects the winds to increase to 75 knots. In order to meet the stability and leg strength requirements, the tip-of-can (TOC) position should be at o (A) 0.00 feet (flush with bottom of hull) o (B) 1.20 feet o (C) feet (D) feet 43. A hurricane has recurved to the northeast and its forward speed is 20 knots. Your MODU is located 600 miles northeast of the hurricane's center. How long will it take for the hurricane center to reach your position if it holds its present course and speed? o (A) 10 hours (B) 30 hours o (C) 50 hours o (D) 80 hours Page 10 of 12

11 44. A MODU displacing 30,500 long tons has a KG of 60 feet. A weight of 500 long tons is discharged from a VCG of 150 feet. What is the change in KG? o (A) 2.5 feet downward o (B) 2.0 feet downward (C) 1.5 feet downward o (D) 1.0 foot downward 45. Scouring is the result of o (A) elevating in mud-slide zones o (B) extracting legs from soils with high cohesion (C) interruption of the normal current flow by the footing o (D) penetrating rapidly through a hard crust into weaker soils 46. A jack-up with a calculated moment to change list one inch (MCL1") of 1,350 foot-kips intends to transfer drill water from a tank with a TCG of 82 feet to a tank with a TCG of 18 feet. How much weight should be transferred to change the draft on the port side from 11.0 to 11.5 feet? o (A) 67.5 kips o (B) 81.0 kips o (C) kips (D) kips 47. On the COASTAL DRILLER, the level of water in each of two pump bilge pits is monitored by hydrostatic alarm switches connected to a remote panel located in the o (A) OIM's quarters o (B) control house (C) OIM's office o (D) SCR room 48. On the COASTAL DRILLER, a noticeable increase in the level indicator while extracting the legs from the soil indicates o (A) the legs are being extracted through a punch-through soil layer (B) one or two legs are stuck o (C) the legs are free o (D) a punch-through is occurring Page 11 of 12

12 49. The maximum angle at which the intact stability curves are valid for MODU's is the angle for o (A) the limit of small-angle stability (B) downflooding o (C) the limit of positive stability o (D) maximum offset 50. The maximum draft to which a drilling unit may be safely loaded is called o (A) mean draft (B) load line draft o (C) calculated draft o (D) deep draft Page 12 of 12