DLC Final Exam Questions with 100% Correct Answers | Verified | Latest Update, Exams of Advanced Education

Download DLC Final Exam Questions with 100% Correct Answers | Verified | Latest Update and more Exams Advanced Education in PDF only on Docsity! DLC Final Exam Questions with 100% Correct Answers | Verified | Latest Update In reference to accidental oil pollution, the most critical time during bunkering is when - Correct Answer-Final topping off is occuring You are on a 30,000DWT tankship engaged in trade to another country signatory to MARPOL 73/78. Which statement is true? - Correct Answer-The IOPP Certificate is valid for 5 years A Tankerman who permits or causes oil to go into a navigable waterway may be punished federally by: - Correct Answer-Fine, imprisonment, suspension or revocation of tankermans document When cleaning up and oil spill in US waters you must obtain the approval of the Federal On-Scene Coordinator before using: - Correct Answer-Chemical Agent After making the required notification that a large oil spill into the water has occurred, the First action should be to: - Correct Answer-Contain the spread of the oil Most minor spills of oil products are caused by: - Correct Answer-human error The term "oil" as used in the Oil Pollution Regulations means: - Correct Answer-Fuel oil, Sludge, Oil Refuse Small oil spills on deck can be kept from going overboard by: - Correct Answer-Plugging the scuppers Which is NOT a mandatory part of the shipboard Oil Pollution Emergency plan? - Correct Answer-Diagrams A shipboard Oil Pollution Emergency Plan is required of: - Correct Answer-An oil tanker of 150 gross tons and above, or other ships of 400 gross tons and above As soon as the officer in charge of the vessel has taken steps to stop the discharge of oil or oily mixture into a US harbor, what must he do first? - Correct Answer-Call the Coast Guard A high velocity fog stream can be used in fire fighting situations to drive heat and smoke ahead of the firefighters in a passageway. This technique should only be used when: - Correct Answer-There is an outlet for the smoke and heat A fire starts on your vessel while refueling. You should FIRST: - Correct Answer-Sound the general alarm All of the following are part of the fire triangle EXCEPT: - Correct Answer-Electricity Production of mechanical foam by a portable in-line foam proportioner: - Correct Answer-Gives the nozzleman more freedom of movement, since it can be placed anywhere in the hose line. When the handle of an all-purpose nozzle is pulled all the way back, it will: - Correct Answer-Produce a straight stream When compared to low-expansion foam, a high expansion foam will - Correct Answer-Be drier A fire in the galley ALWAYS poses the additional threat of: - Correct Answer-A grease fire in the ventilation system What can be used to prevent a flammable atmosphere from occurring in a tank container? - Correct Answer-Inert Gas The deck water seal of the inert gas system: - Correct Answer- Prevents the backflow of hydrocarbon gases into non- hazardous areas What is the required gas supply capacity of an inert gas system? - Correct Answer-125% of cargo pump capacity Which alarm is NOT found on an inert gas system? - Correct Answer-Low oxygen alarm Each inert gas system must be designed to supply the cargo tanks with a gas, or mixture of gases, that has an oxygen content by volume of: - Correct Answer-5% or less Which statement about the pressure in a tank being inerted by an inert gas system is TRUE? - Correct Answer-A positive pressure should be maintained at all times. Which operation may cause the pressure in an inert tank to fall below the prescribed limits? - Correct Answer-Discharging Introducing inert gas into a tank already inert with the object of further reducing the oxygen or hydrocarbon content to prevent combustion if air enters the tank is called: - Correct Answer-Purging In order for combustion to occur inside a piping system such as a vapor collection header in a marine emission control system, there must be: - Correct Answer-Ignition, oxygen, fuel By regulation, cargo tank atmosphere must be inert before and during which operation? - Correct Answer-Topping off, stripping, crude oil washing You are on an inerted tankship. A low pressure alarm must be set to cause an audible and visual alarm if the pressure in the tanks cannot be maintained at more than - Correct Answer-4" water gauge/100 millimeters of water pressure The complete details of a crude oil washing system aboard your vessel, including the operating sequences and procedures, design characteristics, a descriptions of the system, and required personnel will be found in the: - Correct Answer-Crude Oil washing operations and equipment manual Every crude oil tanker of 5,000 tons deadweight and above delivered after June 1 1982 shall be fitted with a cargo tank cleaning system using crude oil washing - Correct Answer- False You are loading crude oil up in Valdez, AK. Due to the level in the cargo tanks, you must start the Crude oil wash before you get to 20' ullage - Correct Answer-False Piping of the COW system can be located in the Engine room and machinery spaces - Correct Answer-False When completing the COW pressure test, the test must be conducted at: - Correct Answer-The working pressure of COW operations What must be checked and calibrated on the inert gas system before you start up the IG? - Correct Answer-Oxygen Analyzer On Crude Oil Washing, the bottom wash cycle is the most critical part of operations. - Correct Answer-True Spot washing with portable machines is recommended during COW operations due to the shadowing effect from the tank bottom. - Correct Answer-False What is the flash point of a Grade D liquid? - Correct Answer- Greater than 80F and less than 150F When conducting the Ballast water Exchange, the exchange procedure shall be carried out at least 100nm from land, and a depth of 1000m or greater. - Correct Answer-False During transfer operations, ethyl chloride spills into the water. According to the Chemical Data Guide, at what temperature will the ethyl chloride boil off the water? - Correct Answer- Above 54F What can be used to prevent a flammable atmosphere from occurring in a tank container? - Correct Answer-Inert gas What does the grade B flammable liquid carbon disulfide produce when burning? - Correct Answer-Sulfur dioxide gas Which of the following describes the depth of a product in a tank? - Correct Answer-Innage When stripping a tank, excessive air in the suction line may cause - Correct Answer-A loss of suction What is NOT a requirement for the safe and effective use of a crude oil washing system? - Correct Answer-Use portable washing machines to reach areas obscured by structural members in the tanks You have completed a crude oil wash. What action should be taken with the oil in the lines running to the washing machines? - Correct Answer-Open a COW nozzle forward and one aft and drain the line into the after tank by gravity In order to reduce the accumulation of static electricity while loading petroleum products you should: - Correct Answer- Start to load slowly When discharging a tanker, how can it be controlled? - Correct Answer-By using wing tanks near the longitudinal center, discharging as necessary Which pump must always be primed? - Correct Answer- Centrifugal pump What is the purpose of pressure-vacuum relief valves? - Correct Answer-Automatic regulation of pressure or vacuum in enclosed spaces What is the purpose of the relief valve of a cargo pump? - Correct Answer-Permits the return of cargo to the suction side of the pump→ 125psi What is a characteristic of all centrifugal cargo pumps? - Correct Answer-Decreasing the speed of rotation will decrease the discharge pressure Which characteristic is an advantage of a butterfly valve as compared to a gate valve? - Correct Answer-Quick operation Which topic is NOT required to be discussed at the pre- transfer conference? - Correct Answer-Estimated time of finishing carg What is the lowest temperature at which a liquid gives off sufficient vapors to form a flammable mixture with air in the presence of an ignition source? - Correct Answer-Flash Point What type of valve is usually on the discharge side of a cargo pump on a tank vessel? - Correct Answer-Check Valve A deep well pump is a type of: - Correct Answer-Centrifugal pump The piping that routes an oil cargo from the manifold to underdeck pipelines is known as a: - Correct Answer-Drop The fitting at the end of a cargo line in a tank that allows suction to be taken close to the bottom of a tank is a: - Correct Answer-Bell Mouth Which of the following is the pipe used to connect two separate piping systems on a tank vessel? - Correct Answer- Cross Over Which of the signals listed is required to be displayed at night while bunkering at a dock? - Correct Answer-One red light→ Bravo flag during the day A precaution you should take before bunkering is to: - Correct Answer-Plug the scuppers What is the major function of the deck water seal in an inert gas system? - Correct Answer-Isolates hazardous areas from non hazardous areas Which function is NOT provided by the scrubber of an inert gas system? - Correct Answer-Maintains gas pressure in the tanks During the annual inspection by the owner, each non metallic oil transfer hose must not burst, bulge or leak, or abnormally distort under static pressure of at least: - Correct Answer-1 1⁄2 times the maximum allowable working pressure Small oil spills on deck can be kept from going overboard by: - Correct Answer-Pluggin the scuppers When discussing toxicity and effects on personnel, which exposure is the most difficult to control? - Correct Answer- Inhilation The method of bottom piping where cargo flows through sluice gates and is pumped out in the aftermost tanks is called: - Correct Answer-Free-flow A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame: - Correct Answer-Screen How many gallons are in a US Barrel? - Correct Answer-42 Gallons USCG standards for oxygen levels in inerted tanks need to be at or below: - Correct Answer-8% The distance from and above deck datum to the surface of the liquid of the tank is called? - Correct Answer-Ullage The method of gauging that keeps the contents and vapors from being released in Open Gauging - Correct Answer-false The water that settles out at the bottom of the Cargo tank is called? - Correct Answer-Thievage In cargo measurement it is the total amount of oil at ambient temperature (total observed volume - water=) - Correct Answer-Gross observed volume Tankers are longitudinally framed vessels? - Correct Answer- True A tank is considered properly purged when the measured hydrocarbon level is found to be ____% or less by volume in the space. - Correct Answer-2% How many feet are in a meter? - Correct Answer-3.281 ft The process of completing the loading of a cargo tank to a specific ullage. It is considered a critical operation in the transfer of the cargo given the high potential for a spill. MUST be under the supervision of PIC - Correct Answer-Topping off Measured in a scale of degrees it is used in the transportation industry as an alternative means of expressing the weight of a measured volume of a liquid - Correct Answer-API Gravity All single hulled tankers must be phased out in what year in the US? - Correct Answer-2015 The process of ventilating a space with air to prepare the space for various operations such as entry, drydock, hotwork, etc - Correct Answer-Gas Freeing