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

USCG Deck General (Set 32)

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Question 1 of 30

Cargo tanks on barges fitted with goose neck vents and flame screens are limited to carrying which grade of cargo?

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30 MCQs

#1 Cargo tanks on barges fitted with goose neck vents and flame screens are limited to carrying which grade of cargo? #2 Which statement about the inert gas system is TRUE? #3 When loading bulk liquid cargo, what is the first action you should take if a cargo valve jammed open? #4 What percent of oxygen content by volume, must each inert gas system be designed to supply the cargo tanks with a gas, or mixture of gases? #5 During loading and discharging operations, in addition to when the cargo tanks have been properly filled, each inert gas system must be capable of maintaining a minimum gas pressure of __________. #6 Which spaces are required to be segregated from cargo tanks carrying grades A, B, C, or D cargoes? #7 The only portable electrical equipment permitted in a compartment which is not gas free is a lamp that is __________. #8 Before welding in a tank that has carried petroleum products, the tank must be certified by __________. #9 Cargo hose carried on tank vessels shall be able to withstand a pressure of at least how many psi? #10 What must cargo pumps in tank vessels carrying grade D liquid cargo be isolated from sources of vapor ignition by? #11 What is an advantage of a gate valve over a butterfly valve? #12 Which of the following will be the indication of the tendency of a grade "B" product to vaporize? #13 According to U.S. regulations which of the following statements is correct regarding the fuel oil containment around loading manifolds? #14 By regulation, cargo tank atmosphere must be inert before and during which operation? #15 What must cargo tanks be fitted with to prevent over pressurization when loading liquid petroleum products? #16 A tanker is loaded with 8,000 barrels of fuel oil. The temperature of the cargo is 50°F. API gravity is 37°. The volume correction factor (VCF) is .0005. What is the net amount in barrels of cargo loaded? #17 What is an advantage of the spherical type containment system? #18 The vapor pressure of a gas is defined as the pressure necessary to keep it in what state? #19 According to U.S. regulations, which grade(s) of cargo may be carried in tanks that are vented only with gooseneck vents and flame screens? #20 Which of the following describes the requirement for ventilation spaces of a gas safe space within the cargo area? #21 What type of gas detection device is used to determine when gassing up is complete? #22 Sounding tubes and access openings for fuel oil tanks on cargo vessels are permitted by U.S. regulations to be located in which of the listed spaces? #23 How many, and what type, fire extinguishers are required on an unmanned oil barge during transfer operations, if the barge has no cargo pumps aboard? #24 When stripping a tank, excessive air in the suction line may cause __________. #25 The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a __________. #26 Your ship departed Venezuela for New York, loaded with 10,000 barrels of crude oil, whose average cargo temperature was 30°C (86°F). API is 25°. The volume correction factor (VCF) is .00045. If this cargo is heated to 100°F prior to discharge, how many barrels will you offload? #27 Which of the following terms best defines the spontaneous mixing of a tank's liquid contents when a heavier layer forms above a less dense lower layer? #28 In special cases, the Commandant of the Coast Guard may permit cargo piping to pass through machinery spaces. This is permitted provided that the only cargo carried through such piping is(are) which of the following? #29 Introducing inert gas into a tank already inert with the object of further reducing the oxygen or hydrocarbon content to prevent combustion if air enters the tank is called __________. #30 When tank cleaning with a portable machine, the weight of the machine is suspended from __________.

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