Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Engineering Safety & Environmental Protection (Set 26)
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Question 1 of 30
Which of the gases listed is the poisonous gas most likely to be found in a closed compartment involved in a fire?
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30 MCQs #1 Which of the gases listed is the poisonous gas most likely to be found in a closed compartment involved in a fire? #2 The upper explosive limit (UEL) of a mixture of flammable vapors and air is defined as __________. #3 In figure 1 of the illustration, fire would spread to compartment "B" by __________. Illustration SF-0013 #4 It is necessary to cool the bulkheads and decks surrounding a compartment where there is a fire in order to __________. #5 To prevent the spread of fire by convection you should __________. #6 The spreading of fire as a result of heat being carried through a vessel's ventilation system is an example of heat transfer by __________. #7 In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by ____________. #8 The air flow depicted in figure 1 of the illustration is an example of which type of ventilation? Illustration SF-0013 #9 Radiation can cause a fire to spread by __________. #10 Through which of the listed processes is sufficient heat produced to cause spontaneous ignition? #11 The process that occurs when heat is generated by a chemical reaction within a substance and continues to a point of ignition is known as __________. #12 Hazardous conditions exist which may result in spontaneous combustion when __________. #13 To prevent oily rags from spontaneously igniting they should be __________. #14 When entering the pump room of a tank vessel to rescue an unconscious person, which items of the equipment listed are you required to be using? #15 Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent? #16 The advantage of using a dry chemical fire extinguishing agent is __________. #17 When using foam, a 'Class B' fire is extinguished by __________. #18 Which of the following statements is true concerning the Halon 1301 fire extinguishing agent? #19 When compared to other fire extinguishing agents, water fog __________. #20 Which of the listed characteristics applies to a semi-portable CO2 system? #21 The air flow depicted in figure 1 of the illustration is an example of which type of ventilation? Illustration SF-0013 #22 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? #23 Which of the gases listed is the poisonous gas most likely to be found in a closed compartment involved in a fire? #24 All of the following are part of the fire triangle EXCEPT __________. #25 Ethylene oxide has a lower explosive limit of 2.0% and an upper explosive limit of 100% by volume in air. This means __________. #26 By definition, combustible liquids are liquids which __________. #27 The explosive range of a mixture of flammable vapors and air lies between the lower and upper explosive limits. These limits are specified as a percentage of __________. #28 Which of the following conditions is true concerning flammable liquid vapors with a concentration above the upper explosive limit? #29 As a general rule of thumb, with no adverse wind conditions, approximately how far could a straight stream of water reach from a fire hose having a nozzle pressure of 100 psi? #30 If a fire hose is left unattended and under pressure with the nozzle shut off, the fire hose will __________.
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