National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 18
Choose the best answer to the following Multiple Choice questions. 1. In illustration D033DG below, what is a wooden deck installed on top of the plating lettered N known as? (A) ceiling o (B) furring o (C) spar decking o (D) flooring 2. Which of the following statements is true concerning the control activators, i.e., pull-handles, pushbuttons or levers, for a space protected by a CO2 fixed fire extinguishing system? o (A) Only one control activator is required for discharge piping systems designed without a stop valve. o (B) An alarm must sound for at least 20 seconds before CO2 is released into a space that is likely to be occupied. o (C) Two control activators are required when a stop valve is installed in the main discharge line to a space. (D) All of the above 3. Dual electro-hydraulic steering units usually operate. o (A) with both pumps on line at the same time o (B) only when the rudder is moved amidships o (C) with the follow-up gear disconnected (D) with one pump on standby 4. An upright vessel has negative GM. GM becomes positive at the angle of loll because the. o (A) underwater volume of the hull is increased o (B) free surface effects are reduced due to pocketing (C) effective beam is increased causing BM to increase o (D) KG is reduced as the vessel seeks the angle of loll Page 2 of 18
5. Which visual distress signal is acceptable for daylight use only? o (A) Red aerial pyrotechnic flare (B) Hand-held orange smoke distress flare o (C) Hand-held red flare o (D) Self-contained rocket-propelled parachute red flare 6. The difference between the height of the metacenter and the metacentric height is known as. (A) height of the center of gravity o (B) metacentric radius o (C) height of the center of buoyancy o (D) righting arm 7. What is the calling and distress frequency on a single side band (SSB) marine radiotelephone? o (A) 1492 khz o (B) 1892 khz o (C) 2082 khz (D) 2182 khz 8. On what type of pump would you find an impeller? (A) Centrifugal o (B) Piston o (C) Vane o (D) Gear 9. During a SAR helicopter evacuation which of the following describes the proper donning of a rescue sling? o (A) The person sits in the sling with their hands clasped across the chest while facing the winch hook (B) The loop of the sling passes behind the back and under the arms while facing the winch hook o (C) The person steps onto the sling grasping the hoist line for support while facing away from the winch hook o (D) The loop of the sling passes across the chest and under the arms while facing away from the winch hook Page 3 of 18
10. A foam-type portable fire extinguisher would be most useful in combating which type of fire? (A) A fire from flammable liquids o (B) A fire from combustible metallic solids o (C) A fire in a piece of electrical equipment o (D) A fire in solid materials such as wood or bales of fiber 11. Who has the exclusive use of the radiotelephone as stated in the "Vessel Bridge-to-Bridge Radiotelephone Act"? o (A) a person designated by the Master o (B) the Master or person in charge of the vessel o (C) a person on board to pilot the vessel (D) All of the above 12. When abandoning ship and jumping into the water from a substantial height without a life jacket, you should. (A) jump feet first, covering your nose and mouth with one hand and grasping the opposing upper arm with the other o (B) jump feet first, holding your knees to your chest o (C) hold your arms firmly at your sides and jump feet first o (D) dive head first, using your hands to break the surface of the water 13. Which of the following defines "Rolling Period"? o (A) the time it takes the vessel to make a complete roll such as from port to starboard and return to level (B) the time it takes the vessel to make a complete roll such as from port to starboard and back to port o o (C) the time it takes the vessel to make a complete roll such as from port and return to level (D) the time it takes the vessel to make a complete roll such as from level to starboard and return to port Page 4 of 18
14. Traditionally, the signal for fire aboard ship is. o (A) 1 short blast on the whistle o (B) alternating short and long blasts on the ship's whistle o (C) more than 6 short blasts and 1 long blast on the whistle, and the same signal on the general alarm (D) continuous sounding of the ship's whistle and the general alarm for at least 10 seconds 15. Shell plating is. o (A) synonymous with decking o (B) a hatch cover (C) the outer plating of a vessel o (D) the galvanizing on steel 16. You are on a ship that has broken down and are preparing to be taken in tow. You will use your anchor cable as part of the towline. Which statement is TRUE? o (A) The anchor cable should be veered enough to allow the towline connection to be just forward of your bow. o (B) The anchor cable should be veered enough to allow the towline connection to be immediately astern of the towing vessel. o (C) The anchor cable should be led out through a chock, if possible, to avoid a sharp nip at the hawsepipe lip. (D) The strain of the tow is taken by the riding pawl, chain stopper, and anchor windlass brake. 17. Which causes spontaneous combustion? (A) A chemical action within a substance o (B) The conduction of heat through a wall of material to the substance o (C) An outside heat source heating a substance until it ignites o (D) All of the above 18. What is the purpose of the freeing ports on a vessel with solid bulwarks? o (A) Permit easy jettisoning of deck cargo in an emergency o (B) Lighten the above deck weight caused by a solid bulwark o (C) Prevent the formation of any unusual stress concentration points (D) Allow water which may be shipped on deck to flow off rapidly Page 5 of 18
19. Which statement is TRUE concerning lifeboat installations on Great Lakes vessels? o (A) All vessels over 3,000 gross tons must be fitted with gravity davits. (B) All lifelines shall be able to reach the water at the vessel's lightest draft with a 20 list. o (C) All davit installations shall have 3 lifelines fitted to a davit span. o (D) All of the above 20. What is the purpose of the limit switch on gravity davits? o (A) To stop the davits from going too fast (B) To cut off the power when the davits are about 12 inches or more from the track safety stops o (C) To cut off the power when the davits hit the track safety stops o (D) None of the above 21. A combination or all-purpose nozzle produces. o (A) a solid stream and foam o (B) a solid stream only (C) a solid stream and fog o (D) low-velocity fog only 22. In a fixed CO2 fire extinguishing system where pressure from pilot cylinders is used to release the CO2 from the main bank of 20 cylinders, what is the minimum number of required pilot cylinders? (A) 2 o (B) 3 o (C) 4 o (D) 6 23. When communicating on the radiotelephone using plain English, what procedure word indicates the end of my transmission and that a response is necessary? (A) Over o (B) Out o (C) Wilco o (D) Roger Page 6 of 18
24. You are on watch at sea on course 090 T. A man falls overboard on your starboard side. You immediately start a Williamson Turn. Which action is NOT a part of a Williamson Turn? o (A) Shift the helm to left full rudder. (B) Stop the engines until clear of the man. o (C) Continue with left rudder until on course 270 T. o (D) Come right full rudder until the vessel heads 150 T. 25. If you are unable to stop a diesel engine by any other means, you should. o (A) secure the jacket water (B) discharge a CO2 extinguisher in the air inlet o (C) pull off the distributor cap o (D) secure the starting air supply valve 26. The free surface correction depends upon the dimensions of the surface of the free liquid and the. o (A) location of the tank in the vessel o (B) volume of liquid in the tank o (C) height of the center of gravity of the vessel (D) displacement of the vessel 27. Which term defines the minimum concentration of a vapor in air which can form a mixture that ignites and burns? (A) lower flammable limit (LFL) o (B) Flash point o (C) Threshold limit value (TLV) o (D) Auto-ignition point 28. A vessel's "quarter" is that section which is. o (A) abeam o (B) dead astern (C) on either side of the stern o (D) just aft of the bow Page 7 of 18
29. What should you do, if help has not arrived in 10-12 hours, after having abandoned your vessel in a survival craft? o (A) take a vote on the direction in which to go o (B) go in one direction until the fuel runs out (C) shutdown the engines and put out the sea anchor o (D) plot course for the nearest land 30. Line throwing apparatus aboard ship must contain. o (A) two rockets, one of which shall be the buoyant type o (B) three rockets, one of which shall be the buoyant type (C) four rockets, two of which shall be the buoyant type o (D) five rockets, two of which shall be the buoyant type 31. The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the. (A) counterweight o (B) longitudinal centerline o (C) point of suspension o (D) pedestal 32. Which of the following would be of immediate concern after discovering a large fire in the ship's galley? o (A) An adjacent storeroom, marked "Stewards Stores" (B) A storeroom directly above, containing combustible fluids o (C) An adjacent storeroom, containing spare parts o (D) An adjacent storeroom, containing mattresses and linen 33. What is the BEST conductor of electricity? (A) Salt water o (B) Distilled water o (C) Fresh water o (D) Carbon dioxide Page 8 of 18
34. The tops of the thwarts, side benches, and the footings of a lifeboat are painted which color? o (A) Yellow o (B) White (C) International orange o (D) Red 35. You must shore up the collision bulkhead due to solid flooding forward. The bulkhead approximates an inverted triangle. The center of pressure of the shores on the bulkhead should be located. (A) approximately halfway up the bulkhead o (B) at the bottom of the bulkhead o (C) evenly over the surface of the bulkhead o (D) approximately two-thirds of the way up the bulkhead 36. The signal given to commence lowering the lifeboats is. o (A) 3 short blasts on the ship's whistle o (B) 3 long blasts on the ship's whistle (C) 1 short blast on the ship's whistle o (D) 1 long blast on the ship's whistle 37. The inside light in an inflatable liferaft is turned on. (A) automatically as the liferaft inflates o (B) at night because the light has a photosensitive switch o (C) with a switch near the boarding handle o (D) by screwing the bulb in after the raft is inflated 38. A spark arrestor. o (A) keeps sparks from falling into an open tank o (B) grounds static electricity (C) prevents sparks from getting out of an engine's exhaust system o (D) secures covers on ullage openings Page 9 of 18
39. You are on watch and see a man fall overboard. Which man overboard turn should NOT be used in this situation? (A) Scharnow o (B) Williamson o (C) Racetrack o (D) Single turn 40. What is the maximum length of time that distress flares are approved for? o (A) 1 and 1/2 years o (B) 2 years (C) 3 and 1/2 years o (D) 5 years 41. When personnel are lifted by a helicopter from an inflatable liferaft, what should the personnel on the raft do? o (A) Inflate the floor of the raft to provide for additional stability o (B) Take in the sea anchor to prevent fouling of the rescue sling (C) Deflate the floor of the raft to reduce the danger of capsizing o (D) Remove their lifejackets to prepare for the transfer 42. How should the letter "W" be pronounced when spoken on the radiotelephone? o (A) DUB A U o (B) WI NE (C) WISS KEY o (D) WOO LF 43. Which of the following grounding scenarios would have the least damaging effect on vessel stability? o (A) Grounding does not affect the stability o (B) The vessel grounds on a pinnacle (C) The vessel grounds on a level bottom o (D) The vessel refloats on its own Page 10 of 18
44. A fire in a pile of canvas is classified as class. (A) A o (B) B o (C) C o (D) D 45. Your vessel has grounded on a bar. What should you do? o (A) If you cannot get clear immediately, lighten the ship by pumping all ballast overboard. (B) Switch to the high suction for condenser circulating water, if it is submerged. o (C) Run the engine full astern to keep from being set further onto the bar. o (D) All of the above 46. Which is the lifesaving signal for, "This is the best place to land"? o (A) Orange smoke signal o (B) Red star rocket (C) Green star rocket o (D) Horizontal motion of a flag 47. The brickwork surrounding the firebox of a boiler is known as. o (A) fire plate (B) refractory o (C) the screen wall o (D) the waterwall 48. Lifesaving regulations in Subchapter W require that a fire drill include which of the following? o (A) Starting the fire pumps o (B) Checking arrangements for abandon ship o (C) Checking the operation of watertight doors (D) All of the above Page 11 of 18
49. The officer responsible for the sanitary condition of the engineering department is the. o (A) Master o (B) First Assistant o (C) Chief Mate (D) Chief Engineer 50. How are automatic fire dampers in ventilation systems operated? o (A) Heat or smoke detectors activate the dampers o (B) By the use of CO2 system pressure switches o (C) Remotely operated valves to control the damper (D) Fusible links that melt and release the damper 51. Using a sea anchor will. o (A) aid in recovering the liferaft (B) reduce your drift rate o (C) keep the liferaft from turning over o (D) increase your visibility 52. Aboard a survival craft, ether can be used to. o (A) prime the air supply (B) start the engine in cold weather o (C) prime the sprinkler system o (D) aid in helping personnel breathe 53. Free communication effect is in direct proportion to. o (A) length of space only o (B) width of space only (C) length and width of space o (D) neither length nor width Page 12 of 18
54. You are tending the lifeline of a man who entered a compartment using a breathing apparatus. How many tugs on the lifeline indicate the man should back out? o (A) 1 o (B) 2 (C) 3 o (D) 4 55. You are approaching a ship that is broken down and are preparing to take her in tow. BEFORE positioning your vessel to pass the towline, which action should you take? o (A) Secure the bitter end of the towing hawser to prevent loss if the tow is slipped o (B) Install chafing gear on the towline (C) Compare the rate of drift between the ships o (D) Have traveling lizards rigged to guide the towline while it is paid-out 56. The governor brake on a lifeboat winch shall be capable of controlling the speed of lowering a fully equipped lifeboat from a cargo ship at. o (A) not more than 90 feet per minute o (B) a safe speed only specified (C) not more than 120 feet per minute o (D) not less than 120 feet per minute 57. Many vessels are provided with flume tanks, which also have a dump tank located under the flume tanks. In the event the ship is damaged, you could dump the flume tanks into the dump tank which would. o (A) reduce the free surface effect and raise the KG o (B) not have any effect on free surface and lower the KG o (C) not have any effect on free surface and raise the KG (D) reduce the free surface effect and lower the KG 58. Which is the flammable range of Bunker C mixed with air? o (A) 0% to 1% by volume (B) 1% to 5% by volume o (C) 5% to 10% by volume o (D) 10% to 20% by volume Page 13 of 18
59. All of the following are recognized distress signals under the Navigation Rules EXCEPT which signal? o (A) The repeated raising and lowering of outstretched arms (B) A green star signal o (C) Orange-colored smoke o (D) Red flares 60. When evacuating a seaman by helicopter lift, which course should the ship take? (A) A course that will keep a free flow of air, clear of smoke, over the hoist area. o (B) Downwind so that the apparent wind is close to nil. o (C) With the wind dead ahead because the helicopter is more maneuverable when going into the wind. o (D) A course that will have the hoist area in the lee of the superstructure. 61. When the helm is turned on the navigation bridge, which of the listed actions will be the FIRST response in the steering room on a ship equipped with an electro-hydraulic steering gear? o (A) The six-way valve aligns itself with the running pump. o (B) The pumps go to full stroke. (C) The synchronous receiver turns, duplicating the helm motion. o (D) Both port and starboard cables are energized. 62. During fueling, all doors, hatches, and ports. o (A) should be opened o (B) to windward should be opened and the ones to leeward should be closed (C) should be closed o (D) to leeward should be opened and the ones to windward should be closed 63. Where would spontaneous combustion most likely to occur? o (A) In overloaded electrical circuits o (B) In partially loaded fuel tanks o (C) In dirty swabs and cleaning gear (D) In rags soaked in linseed oil Page 14 of 18
64. Which statement about immersion suits is TRUE? o (A) The suit is flameproof and provides protection to the wearer while swimming through burning oil. o (B) The suit seals in body heat and provides protection against hypothermia indefinitely. (C) The suit must, without assistance, turn an unconscious person's mouth clear of the water within 5 seconds. o (D) The suit's oil resistance is such that it will be serviceable and be usable after exposure to gasoline or mineral spirits without needing to be specially treated. 65. A man who is conscious has fallen overboard is being picked up by a lifeboat. In a mild breeze how should the the boat should approach the person in the water? o (A) With the wind ahead and the victim just off the bow (B) With the wind just off the bow and the victim to leeward o (C) With the wind just off the bow and the victim to windward o (D) With the wind astern and the victim just off the bow 66. You are testing the external flotation bladder of an immersion suit and find it has a very slow leak. Which action should be taken? o (A) Replace the inflation bladder. o (B) Replace the suit. (C) Contact the manufacturer for repair instructions. o (D) Some leakage should be expected and a topping off tube is provided; no other action is necessary. 67. All inflatable liferafts have. o (A) releasing hooks at each end (B) water stabilizing pockets o (C) built in seats o (D) safety straps from the overhead 68. What is NOT a function of the steam drum of a marine water-tube boiler? o (A) Receives saturated steam from the generating tubes o (B) Serves as a reservoir of boiler feed water (C) Collects steam exhausted from the turbines o (D) Holds internal fittings for separation of moisture from steam Page 15 of 18
69. By regulation, orange smoke distress signals will expire not more than how many months from the date of manufacture? o (A) 24 months o (B) 36 months (C) 42 months o (D) 54 months 70. In the illustration D041DG below, what does symbol 3 represent? o (A) baseline o (B) forward perpendicular o (C) displacement (D) amidships Page 16 of 18
National Maritime Center Providing Credentials to Mariners D033DG 5/23/2016 Adapted for testing purposes only Further reproduction prohibited without permission Page 17 of 18
National Maritime Center Providing Credentials to Mariners D041DG 5/23/2016 Adapted for testing purposes only Further reproduction prohibited without permission Page 18 of 18