Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Engineering Safety & Environmental Protection (Set 7)
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Question 1 of 30
In firefighting, the term 'protecting exposures' means __________.
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30 MCQs #1 In firefighting, the term 'protecting exposures' means __________. #2 During cargo operations, a deck fire has occurred due to a leaking cargo line. You should FIRST __________. #3 When fighting a shipboard fire, crew members securing doorways, hatches, and applying cooling water to adjacent decks and bulkheads, while monitoring the spread of heat and smoke, are setting a _________. #4 When approaching a fire from windward, you should shield firefighters from the fire by using an applicator and __________. #5 Which of the following statements represents the correct action to take when three crew members discover a fire? #6 If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of __________. #7 When combating a major electrical fire at sea, the main consideration is __________. #8 The most important characteristic of a fire extinguishing agent to be used on electrical fires is for the agent to be __________. #9 Which extinguishing agent is the best for use on electrical fires? #10 If a fire occurs in an electric cable, in which the inner layers of insulation, or the insulation covered by armor is burning, you should __________. #11 In fighting a fire in a fuel tank, the FIRST action you should attempt is to __________. #12 The longer an oil fire is permitted to burn, the __________. #13 The best means of combating an oil fire on the surface of the water surrounding a vessel tied to the pier is to use __________. #14 When fighting a liquefied natural gas fire, you should __________. #15 One of the main concerns when fighting a galley fire is __________. #16 In the event of an exhaust duct fire, most dry chemical and carbon dioxide galley range fixed extinguishing systems are automatically activated through the action of a stainless steel cable, spring and a __________. #17 The airborne concentrations of substances (such as hydrogen sulfide) under which nearly all workers may be repeatedly exposed without adverse effects are called __________. #18 If flammable vapors have penetrated a gas free space, which of the following actions would be the most hazardous to perform? #19 A tank has been sealed and unventilated for a long period of time. Which of the following statements is true? #20 Before entering any space that has been sealed, its oxygen level should be tested. What level of oxygen in the space is equal to fresh air? #21 The reading of a combustible gas indicator indicates the percentage of the __________. #22 Combustible gas indicators incorporate the use of a/an __________. #23 Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an __________. #24 An oxygen indicator will detect __________. #25 Which of the following statements is true regarding oxygen indicators? #26 For hydrogen sulfide detection, sensitized tapes indicate the presence of this gas by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of the gas and __________. #27 When required to work in an area where explosive gases may accumulate, you should use tools which are __________. #28 If you see an individual fall overboard, you should __________. #29 The worst atmospheric condition for dispersion of hydrogen sulfide is __________. #30 The explosive range of methane is 5% to 15% by volume in air. This means a vapor/air mixture of __________.
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