National Maritime Center

Transcription

1 National Maritime Center Providing Credentials to Mariners U.S.C.G. Merchant Marine Exam (Sample Examination) Page 1 of 21

2 Choose the best answer to the following Multiple Choice Questions. 1. By which of the listed methods may heat be transferred from one body to another? o (A) Convection o (B) Conduction o (C) Radiation (D) All of the above 2. The depth of fuel oil in a tank is normally measured through the. o (A) vent line o (B) overflow line o (C) feed line (D) sounding tube 3. Which of the following precautions should be taken prior to lighting off a boiler? (A) Purge the furnace of combustible gases. o (B) Bottom blow the mud drum. o (C) Close the air register. o (D) Secure the main steam line drains. 4. What statement is true concerning a propulsion steam turbine turning (jacking) gear? o (A) The jacking gear splined clutch is associated with the low-pressure turbine second reduction pinion. o (B) The jacking gear splined clutch is associated with the low-pressure turbine first reduction pinion. (C) The jacking gear splined clutch is associated with the high-pressure turbine first reduction pinion. o (D) The jacking gear splined clutch is associated with the high-pressure turbine second reduction pinion. Page 2 of 21

3 5. What is the normal destination of steam exiting a main feed pump drive turbine? o (A) SSTG condensers via the auxiliary exhaust steam line. o (B) Main condenser via the auxiliary exhaust steam line. o (C) Deaerating feed tank via the main feed pump discharge line. (D) Deaerating feed tank via the auxiliary exhaust steam line. 6. If for any reason it is necessary to abandon ship while far at sea, it is important for the crew members to. o (A) separate from each other as this will increase the chances of being rescued o (B) get away from the area because sharks will be attracted to the vessel o (C) immediately head for the nearest land (D) remain together in the area because rescuers will start searching at the vessel's last known position 7. In cleaning up an oil spill, the use of straw or reclaimed paper fibers would be an example of which type of oil removal? o (A) Mechanical removal o (B) Chemical agent removal (C) Absorbent removal o (D) None of the above 8. As a firefighting medium, CO 2 can be dangerous under certain conditions as it can cause. o (A) hallucinations o (B) carbon monoxide poisoning o (C) undulation (D) freeze burns and blistering 9. Which of the components listed prevents water from flowing back into the auxiliary exhaust line if the deaerating feed tank becomes flooded? (A) Check valve o (B) Reverse-acting relief valve o (C) Pumps o (D) Exhaust piping Page 3 of 21

4 10. While raising steam on a cold boiler, the air cock is to be closed after. o (A) the economizer drain is closed (B) steam has formed and all air is vented o (C) all burners have been lit and firing normally o (D) the boiler is cut in on the line 11. The term referring to the number of teeth per inch on a hacksaw blade is known as the. o (A) set (B) pitch o (C) rake o (D) thread gauge 12. If you noted a large difference in the pressures indicated by a duplex pressure gage to the fuel oil system strainer, you should. (A) shift to a clean fuel oil strainer o (B) secure the fuel oil service pump o (C) increase the fuel pump discharge pressure o (D) reduce the firing rate of the boilers 13. For the gland seal regulator shown in the illustration, an increase in gland seal pressure will result in. Illustration SE-0019 (A) piston "F" moving upward to shut the makeup steam valve "B" and open the exhaust valve "E" o (B) piston "F" moving downward to shut the makeup steam valve "B" and open the exhaust valve "E" o (C) piston "F" moving upward to open the makeup steam valve "B" and close the exhaust valve "E" o (D) piston "F" moving downward to open the makeup steam valve "B" and close the exhaust valve "E" 14. An air compressor is equipped with an intercooler and an aftercooler to. o (A) inject water vapor into the compressed air o (B) prevent overheating of first stage valves (C) increase compressor efficiency and economy o (D) reduce the compressed air charge density Page 4 of 21

5 15. The steam drum in a D-type marine boiler. o (A) maintains circulation by forcing steam bubbles downward in the generating tubes o (B) acts as a receptacle for heavy suspended solids in boiler feedwater o (C) supports the superheater tube bank (D) provides a space for moisture to separate from the steam 16. Which of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance? o (A) Lamination (B) Radiation o (C) Conduction o (D) All of the above 17. What type of wound is most susceptible to a tetanus (lockjaw) infection? o (A) Abrasion o (B) Incision o (C) Laceration (D) Puncture 18. If a boiler is brought on the line with its steam pressure much higher than that of the boiler already on the line, there is danger of. o (A) thermal shock o (B) low water o (C) an overloaded superheater (D) priming and carryover 19. Concerning the classification of steam turbines, a cross compound designed unit. o (A) consists of reaction stages and a dummy piston (B) consists of a high-pressure turbine, crossover pipe, and low-pressure turbine o (C) is made up of a varied assortment of impulse and reaction staging o (D) consists of one Curtis stage and reaction blading Page 5 of 21

6 20. In addition to sensing steam drum water level and boiler steam flow, what additional sensing input does a three-element feedwater regulator control system utilize? o (A) Boiler fuel flow o (B) Boiler flue gas flow (C) Boiler feed flow o (D) Boiler air flow 21. To prevent pulsations from developing in the boiler feedwater lines, the discharge side of a reciprocating feed pump is equipped with a/an. o (A) feedwater regulator (B) air chamber o (C) reed valve o (D) relief valve 22. The physical difference of the water spray patterns developed by the high velocity tip and low velocity applicator is due to. o (A) the type of fire being fought o (B) a difference in water pressure (C) the method of breaking up the water stream o (D) the capacity of the fire pump 23. The primary objective of the auxiliary exhaust system is to supply steam to the. o (A) main condenser o (B) main feed pumps o (C) soot blowers (D) deaerating feed tank 24. The purpose of a "peep" hole in the boiler casing is to. o (A) examine the condition of the refractory cones o (B) check the operation of the soot blowers o (C) check for excess smoke in the stack (D) examine the condition of the flame Page 6 of 21

7 25. Which of the following symptoms may be observed in a victim of cardiac arrest as a result of electric shock? o (A) weak pulse at wrist or neck (B) respiration is weak or has stopped o (C) flushed face o (D) all of the above symptoms 26. The emergency bilge suction valve is typically used. o (A) to inject cleaning additives when the bilges are extremely dirty o (B) when the main condenser becomes fouled, in order to provide additional cooling water circulation o (C) to connect the rose box to the independent bilge suction (D) if the bilges become flooded and they cannot be emptied by any other means 27. At a minimum threshold, how many milliamps of current through the body produces a painful sensation that most people would perceive as an electric shock? (A) 3 to 7 ma o (B) 10 to 16 ma o (C) 30 ma o (D) 100 ma for 2.5 sec. 28. Basic emergency care for an electrical burn is to. o (A) brush away the charred skin and wrap the burned area o (B) flood the burn with water for two minutes o (C) apply ointment or spray to the burned area and wrap with a clean cloth (D) cover the burned area with a clean cloth and transport the patient to a medical facility 29. After the steam leaves the low-pressure turbine, it enters the. (A) main condenser o (B) turbine extraction valve manifold o (C) feed and filter tank o (D) first-stage feedwater heater Page 7 of 21

8 30. Artificial respiration may be necessary in cases of. o (A) drowning o (B) poisoning o (C) electrocution (D) all of the above 31. Which of the listed devices would be installed at a control system air pressure reducing station? o (A) Non-return valve o (B) Vacuum breaker o (C) Lubricator (D) Moisture separator 32. What system is represented by the simplified illustration? Illustration SE-0004 o (A) Hydraulic gland seal regulator for the turbo-generator turbines. o (B) Hydraulic throttle control for the main propulsion turbines. (C) Hydraulic gland seal regulator for the main propulsion turbines. o (D) Hydraulic throttle control for the turbo-generator turbines. 33. Annual servicing of a hand portable CO 2 fire extinguisher includes. o (A) hydrostatic testing of the cylinder (B) weighing the cylinder and recharging if weight loss exceeds 10% of the weight of the charge o (C) inspecting the pressure gauge to ensure the needle is within operating range o (D) discharging, cleaning inside, and recharging 34. The cooling water flow from an air ejector intercondenser and after condenser is discharged directly into the. (A) condensate and feed system o (B) main condenser hotwell o (C) atmospheric drain tank o (D) auxiliary condenser hotwell Page 8 of 21

9 35. In a main propulsion steam turbine installation, the condensate pump initially discharges to the. o (A) distillate tank (B) air ejector condenser o (C) deaerating feed tank o (D) first stage heater 36. Condensate return lines from tank heating coils are led to the. o (A) DC heater o (B) atmospheric drain tank (C) contaminated drain system o (D) main condenser 37. The spreading of fire as a result of heat being carried through a vessel's ventilation system, is an example of heat transfer by. o (A) conduction o (B) radiation o (C) windage (D) convection 38. Fuel oil settling tanks are used to. o (A) precipitate out water and solids o (B) store oil for immediate use o (C) facilitate the stripping of sludge and water (D) all of the above 39. A fire is considered "under control" when. o (A) the fixed systems are activated o (B) all firefighting equipment is at the scene (C) the fire is contained and no longer spreading o (D) all hands are at their fire stations Page 9 of 21

10 40. Which of the devices listed would be safe to use in a compartment with insufficient oxygen? o (A) Canister-type mask. (B) Self-contained breathing apparatus. o (C) Dust or gas mask. o (D) Wet handkerchief. 41. Why is it necessary to have a relief valve protect the deaerating feed tank from internal pressure? (A) Because the tank receives high-pressure drains. o (B) Because the tank receives auxiliary exhaust. o (C) Because the tank drains to the main condenser. o (D) Because the tank receives large amounts of water. 42. The valve depicted in the illustration shown is a. Illustration GS-0055 o (A) gate valve (B) butterfly valve o (C) globe valve o (D) check valve 43. What is the characteristic of the blood flow associated with arterial bleeding? o (A) Dark red blood flowing from the wound with a steady flow. o (B) Bright red blood flowing from the wound with a steady flow. o (C) Dark red blood flowing from the wound in spurts. (D) Bright red blood flowing from the wound in spurts. 44. Which system should be used when required to raise the water level in an idle boiler? o (A) Main condensate system (B) Main feed system o (C) Auxiliary condensate system o (D) Chemical feed system Page 10 of 21

11 45. Excessive water loss from the main feed system can be caused by. o (A) excessive recirculation of condensate from the outlet of the air ejector condenser to the main condenser o (B) a leak in the desuperheater internal gasket (C) an atmospheric drain tank trap frozen in the closed position o (D) a vapor bound main condensate pump 46. The microbiological growths that affect fuel supplies can easily be transported from one location to another by. (A) air, solids, or liquids o (B) other non-hydrocarbon fuels o (C) roaches and other insects o (D) all of the above 47. Which of the following actions should be taken FIRST when the boiler fires begin to sputter due to water in the fuel oil? o (A) Shift to the standby fuel oil heater. o (B) Shift to the standby fuel oil pump. o (C) Shift to the settler low suction valve. (D) Shift to the settler high suction valve. 48. Which combustible element in fuel oil is considered a significant and major source of air pollution? (A) Sulfur o (B) Vanadium o (C) Nitrogen o (D) Hydrogen 49. A pipe coupling is a fitting having. o (A) outside threads on both ends (B) inside threads on both ends o (C) a left-hand twist o (D) outside threads on one end and inside threads on one end Page 11 of 21

12 50. The component shown in the illustration would be installed in which of the following types of fire detection systems? Illustration SF-0004 (A) Fixed temperature o (B) Line type pneumatic o (C) Combined fixed temperature and rate-of-rise o (D) Rate-of-rise 51. If the condensate level in the loop seal of the air ejector intercondenser is lost,. (A) air will be drawn back into the main condenser o (B) no condensate will flow through the system o (C) the air ejector will not transfer heat to the condensate o (D) the air ejector will overheat 52. Which of the actions listed should be carried out immediately after securing the fires in one boiler of a two boiler ship? o (A) Open the air registers wide to cool the furnace. o (B) Secure the main feed pump. o (C) Drain and refill the boiler with cold water. (D) Relieve all fuel oil service pressure to that boiler. 53. Prior to relieving the watch you should first check the fire room status by verifying the boiler steam drum level and. o (A) port and starboard settling tank levels o (B) preparing to blow tubes (C) inspecting the fires and burners o (D) stack temperature 54. When heated, fuel oil will. o (A) have a higher specific heat o (B) increase in specific gravity o (C) increase in viscosity (D) expand in volume Page 12 of 21

13 55. During topping off of bunker tanks, the loading rate must be personally supervised by the. (A) person in charge o (B) master o (C) chief engineer o (D) terminal operator 56. Assuming that the turbine in question is a condensing turbine, what system connections are represented by areas labeled "E" and "F" on the illustrated turbine gland? Illustration SE-0006 o (A) Both "E" and "F" represent the gland sealing steam system connections. o (B) Both "E" and "F" represent the gland exhaust steam system connections. (C) "E" represents the gland sealing steam system connection and "F" represents the gland exhaust steam system connection. o (D) "E" represents the gland exhaust steam system connection and "F" represents the gland sealing steam system connection. 57. An auxiliary turbine boiler feed pump should normally be stopped by. o (A) closing the exhaust valve slightly o (B) rotating the hand lube oil pump backwards o (C) increasing the load on the driven unit (D) actuating the throttle hand tripping device 58. You notice smoke coming from an open laundry room doorway, which smells like electrical insulation. After activating the fire alarm, which of the following would be the lowest action priority? o (A) Locate the nearest CO 2 or dry chemical extinguisher. (B) Break out the nearest fire hose. o (C) Close the door to the room. o (D) Secure power to the washers and dryers. 59. Which of the conditions listed would indicate a dirty fuel oil strainer? o (A) Decreasing pressure drop across the strainer o (B) Decreasing fuel oil temperature o (C) Dirt and sediment deposits in the atomizers (D) Decreasing fuel oil pressure at the burner manifold Page 13 of 21

14 60. The main reason for having a low suction line on the fuel oil service or settling tanks is to. o (A) increase the amount of fuel available for use o (B) decrease suction head on the pump o (C) prevent loss of suction during rough weather (D) facilitate water removal 61. The source of power for the CO 2 discharge alarm siren is obtained from. o (A) the emergency power and lighting bus (B) the flow of CO 2 under pressure o (C) the general alarm 24 volt DC bus o (D) all of the above 62. Makeup feedwater is brought into an operating closed feed system via the. o (A) auxiliary feed pump o (B) main feed pump (C) condenser vacuum drag line o (D) feed booster pump 63. The pressure in the feedwater system must exceed boiler steam drum pressure in order to. o (A) prevent air leakage into the feedwater system o (B) prevent water hammer in the lines o (C) remove the steam from the steam drum (D) force the feedwater into the boiler 64. Which of the following statements is correct concerning heat transfer? o (A) Heat is given off from a high temperature region known as a heat sink. o (B) Heat transfer rate is affected most by the size of the heat sink involved. (C) Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink. o (D) Heat transfer by radiation will occur only by mass motion of a fluid substance. Page 14 of 21

15 65. In addition to moving the victim to a shaded area, placing the victim in a prone position and loosening any tight clothing, what treatment should be administered? (A) The patient should be given sips of cool water salted with one teaspoon per glass at a rate of 1/2 glass every 15 minutes for one hour. o (B) The patient should be given sips of unsalted cool water at a rate of 1/2 glass every 15 minutes for one hour. o (C) The patient should be forced to drink large amounts of cool water salted with one teaspoon per glass within 5 minutes. o (D) The patient should be forced to drink large amounts of unsalted cool water within 5 minutes. 66. Which of the listed order of valves represents the proper installation of the main feedwater supply line to a marine propulsion boiler? o (A) Stop, regulator, stop-check o (B) Regulator, stop, stop-check o (C) Stop-check, stop, regulator (D) Stop-check, regulator, stop 67. All portable electric tools should have a ground connection to prevent. (A) electric shock if the tool is shorted o (B) grounding the plastic case through a short o (C) burning out the motor from an overload o (D) overloading the motor from a short 68. As found in a reduction gear drive system, thrust bearings serve to. o (A) limit the radial movement of the shaft (B) transmit the force produced by the propeller to the structure of the ship o (C) hold the main engine in place o (D) increase the shaft speed 69. One function of the air receiver in a compressed air system is to. o (A) remove all traces of oil from the air o (B) dry the air discharged from the intercooler (C) minimize the system's line pulsations o (D) receive exhaust air from pneumatic accessories Page 15 of 21

16 70. At a minimum threshold, how many milliamps of current through the body produces a condition where most people would be unable to let go of the energized electrical conductor due to involuntary muscular contraction? o (A) 3 to 7 ma (B) 10 to 16 ma o (C) 30 ma o (D) 75 ma for 5 sec. Page 16 of 21

17 National Maritime Center Providing Credentials to Mariners GS /1/2016 Adapted for testing purposes only from Marine Gas Turbine Operations NAVEDTRA Further reproduction prohibited without permission Page 17 of 21

18 National Maritime Center Providing Credentials to Mariners SE /8/2016 Adapted for testing purposes only FOX, Marine Steam Engines and Turbines Copyright 1970 by W.J. Fox & S.C. McBirnie Further reproduction prohibited without permission Page 18 of 21

19 National Maritime Center Providing Credentials to Mariners SE /12/2016 Adapted for testing purposes only from HARRINGTON, Marine Engineering Copyright 1992 by the Society of Naval Architects and Marine Engineers Further reproduction prohibited without permission Page 19 of 21

20 National Maritime Center Providing Credentials to Mariners SE /4/2017 Adapted for testing purposes only from HUNT, Modern Marine Engineer s Manual, Volume I Copyright 1999 by Cornell Maritime Press, Inc. Further reproduction prohibited without permission Page 20 of 21

21 National Maritime Center Providing Credentials to Mariners SF-0004 Adapted for testing purposes only from Marine Fire Prevention, Firefighting and Fire Safety U.S. Department of Transportation Maritime Administration 5/25/2016 Further reproduction prohibited without permission Page 21 of 21