Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG Engineering Safety & Environmental Protection (Set 8)

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Question 1 of 30

Which of the following conditions is true concerning flammable liquid vapors with a concentration above the upper explosive limit?

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30 MCQs

#1 Which of the following conditions is true concerning flammable liquid vapors with a concentration above the upper explosive limit? #2 The highest concentration of a harmful substance to which a person may be exposed without danger to health, is termed the __________. #3 By definition, an example of a flammable liquid is __________. #4 According to Coast Guard Regulations (46 CFR), a flammable liquid with a Reid vapor pressure of 8 1/2 psi or less, and a flash point of 80°F or below, is a grade __________. #5 Which of the petroleum products listed has a flash point below 150°F? #6 The vapors given off by heated fuel oil are flammable, explosive, and __________. #7 When preparing to pump flammable liquids with a centrifugal pump, you should __________. #8 Bunker "C" is classified as a grade __________. #9 Which of the following is classified as a grade "E" combustible liquid? #10 Which of the following hazards is associated with the handling of petroleum products? #11 The explosive range of petroleum vapors when mixed with air is __________. #12 When checking the level of a volatile liquid in a tank on the weather deck of a tank vessel, you should position yourself __________. #13 An LNG carrier has an approved type of gas detecting system to detect methane leaks in the __________. #14 Span gas is used aboard liquefied natural gas carriers to __________. #15 Individuals who have consumed alcohol within 24 hours of exposure to H2S can tolerate __________. #16 When pumping sour crude, which gas should be tested for prior to entering the cargo pump room to repair a leaking pump? #17 A high concentration of hydrogen sulfide gas is most likely to be found in which of the locations listed? #18 What information can be obtained from a marine chemist's certificate on a tank barge? #19 A tank or compartment is "gas free" when there is an absence of dangerous concentrations of __________. #20 A compartment is tested and found to contain 20.8% oxygen by volume, permissible concentrations of toxic materials, and concentrations of flammable gas just below the lower flammable limit. If the residues are not capable of producing toxic materials or flammable concentrations, what would be the designation listed on the marine chemist's certificate? #21 If, in a compartment or space, the gas or oxygen content is not within permissible concentration, and dangerous gases are either present, or may be produced by residues, what would be the safety designation listed on a marine chemist's certificate? #22 If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be __________. #23 While in a foreign port, burning and welding repairs are to be carried out on a section of heating coil located in a tank having last contained a grade "D" product. Which of the following procedures should be followed when a certified marine chemist is not available? #24 A health hazard term listed on a Material Safety Data Sheet (MSDS) that indicates allergic-like reaction in some people after repeated exposure is __________. #25 If the chemical material is a mixture, what must the Material Safety Data Sheet (MSDS) identify? #26 A specific document which identifies a chemical, and lists its physical properties, health hazards, required controls, firefighting procedures, cleanup methods, waste disposal, and the safe handling and storage requirements, is commonly called a __________. #27 A liquid, as listed on a Material Safety Data Sheet (MSDS), having a flash point below 100°F (37.78°C) is called a/an __________. #28 The physical data term on a Material Safety Data Sheet (MSDS) that indicates if the vapor formed by a material is lighter or heavier than air is called __________. #29 To prevent oil from escaping into the sea when ballasting through the cargo piping system, you should FIRST __________. #30 Water ballast placed in a tank that has been crude oil washed, but not water rinsed, shall be regarded as __________.

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