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

USCG Deck General (Set 33)

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Question 1 of 30

A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame __________.

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30 MCQs

#1 A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame __________. #2 On what type of pump would you find an impeller? #3 U.S. regulations require that cargo tanks in which grades B or C liquids are carried must be vented with which of the following? #4 When cleaning cargo tanks with portable machines, how is the machine grounded? #5 With an increase in temperature the volume of flammable and combustible liquids __________. #6 What is NOT required of the cargo tank venting on a tank barge carrying grade A liquids? #7 Flames from small leaks of LFG may be extinguished by __________. #8 You are planning to use a crude oil washing system. What precaution must be taken with the source tank for the washing machines? #9 You are towing a 1000 gross ton gasoline tank barge. Regulations say that cargo tank hatches, ullage holes, and Butterworth plates may remain open without flame screens ONLY __________. #10 Which pump must always be primed? #11 In case of a LNG leak from a liquid header flanged connection, what is the first precautionary action to take? #12 A tank barge equipped with an internal-combustion engine-driven cargo pump on the weather deck shall be provided with a minimum of one remote manual shutdown station. What is the correct location of the shutdown station? #13 The vapor pressure of a gas is the pressure necessary to keep it in a(n) __________. #14 A chemical additive to LPG gives it a characteristic __________. #15 The final inspection responsibility for seeing that a tank barge is provided with the required equipment and fittings in good and serviceable condition prior to loading cargo rests with the __________. #16 Most liquified gas cargoes are flammable, and are carried at or close to their boiling point. What will happen if they are released into the atmosphere? #17 You are discharging cargo and the inert gas system is in operation to inert the tanks. The pressure in a tank being discharged starts to drop below the allowable limit. What action should you take? #18 Which statement about the pressure in a tank being inerted by an inert gas system is TRUE? #19 Cargo hose carried on tank vessels must be designed to withstand the pressure of the shutoff head of the cargo pump or pump relief valve setting, but in no case should it be less than __________. #20 While underway and towing an unmanned tank barge you are required to __________. #21 What pressure shall cargo hoses carried on tank vessels be able to withstand? #22 An inert gas system is designed to reduce the possibility of tank explosions by __________. #23 Which function is NOT provided by the scrubber of an inert gas system? #24 Which of the following is not an acceptable means to measure a liquid level in a cyrogenic cargo tank? #25 Your ship has loaded 9,000 barrels of fuel oil at a cargo temperature of 35°C (95° F). API gravity is 44°. The volume correction factor (VCF) is .0005. You are bound to New Jersey from Venezuela. How many barrels would you expect to unload if the cargo temperature is 55°F at the discharge port? #26 What is the minimum temperature required in order for steam driven pumps to be considered a source of vapor ignition? #27 What is the proper direction of flow through a globe valve when the valve is installed to be in a normally open position? #28 Which statement about inert gas pressures in a cargo tank is TRUE? #29 You are on a tankship discharging oil. what happens to the remaining oil when all of the oil that the main cargo pumps can handle is pumped out of a tank? #30 Which of the following is a characteristic of Methane gas?

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