STCW (Part-3) Monkey Mariners Monkey Mariners Get link Facebook X Pinterest Email Other Apps STCW Part-3) STCW (Part-3) Question 1: Which extingiishing agent is most likely to allow reflash as a result of not cooling below its ignition temperatue? a) Co2 b) Water system c) Water spray d) Foam Explanation: CO2 (carbon dioxide) displaces oxygen, but doesn't cool below the ignition temperature, potentially leading to reflash in certain fires. Submit Question 2: A fire in a fuel oil settling tank is a________ a) Class A fire b) Class B fire c) Class C fire d) Class D fire Explanation: Becuse All types of liquid come in Class B type fire. Here settling tank have oil which is liquid. Submit Question 3: A fire in a pile of canvas is classified as class a) A b) B c) C d) D Explanation: Canvas is a Class A fire material, meaning it's susceptible to combustion. It's common in Class A fires involving solid materials. Submit Question 4: The extinguishing agent most likely to allow reignition of a fire is__________ a) Carbon Dioxide b) Foam c) Water Fog d) Water stream Explanation: The extinguishing agent most likely to allow reignition of a fire is Carbon Dioxide. Submit Question 5: As per NFPA, a fir in an electrical generator is considered to be a) Class "A" b) Class "B" c) Class "C" d) Class "D" Explanation: According to the National Fire Protection Association (NFPA), a Class C fire involves energized electrical equipment. These fires specifically refer to any fire that includes electrical components. Submit Question 6: Fires of which class would most likely occur in the engine room of a vessel? a) Classes A and B b) Classes B and C c) Classes C and D d) Classes A and D Explanation: Class B fires, involving flammable liquids like oil and fuel, and Class C fires, involving flammable gases such as propane, butane, and hydrogen, are most likely to occur in the engine room of a vessel. Submit Question 7: What is the most important consideration when determining how to fight an electrical fire? a) Whether the fire is in machinery or passenger spaces b) Danger of shock to personnel c) The amount of toxic fumes created by the extinguisher d) Maintaning electrical power Explanation: The most important consideration when fighting an electrical fire is to ensure the power source is disconnected before using a suitable extinguisher. Submit Question 8: Which type of fire is the foam (stored-pressure type) fire extinguisher effective on? a) Classes A N B b) Classes A N C c) Classes B N C d) None Explanation: Mechanical foam fire extinguishers combat Class A (solids like wood and paper) and Class B (flammable liquids) fires, including petrol and spirits. Submit Question 9: The "flammable limits" of an atmosphere are the a) Two temperature between which an atmosphere will self-ignite b) Upper and lower percentage of vapour concentrations in an atmosphere which will burn if an ignition source is present c) upper and lower pressure betwwn which an atmosphere wiil not burn d) Two temperature between which an atmosphere will burn if an ignition source is present Explanation: Methane under 4.4% in air is too lean to ignite, preventing explosions even with an ignition source. Submit Question 10: Halon is not used as fire extinguishing medium nowdays because__________ a) It is not good extinguishing agent b) It affect's human body c) it reacts with metals d) it is not environmental Friendly Explanation: Halon gases and their fire reaction byproducts damage the ozone layer, contributing significantly to atmospheric depletion and environmental harm. Submit Previous Next Comments
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