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单选题
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（）.
A
crossover
B
runaround
C
come-along
D
manifold
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Valves on steam-smothering lines to cargo tanks shall be set with ______．A.The master control valve shut and valves to individual cargo tanks shutB.The master control valve open and valves to individual cargo tanks shutC.The master control valve shut and valves to individual cargo tanks openD.All valves open
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单选题What is the purpose of pressure-vacuum relief valves? （）A
Regulation of discharge pressure from cargo pumpsB
Maintaining constant velocity in cargo linesC
Regulation of suction head on cargo pumpsD
To maintain a tank or void at atmospheric pressure
考题
单选题Cargo pump relief valves are piped to the（）.A
cargo pump pressure gaugesB
crossover lines interconnecting two pumpsC
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单选题In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause（）A
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单选题A segregated ballast system is a system where （）A
all ballast is processed through the oily water separatorB
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all ballast lines, tanks, and pumps are independent of those used for oil
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A prohibition from loading a cargo from a country when the cargo may be a carrier of infectious diseasesB
Arrest of a vessel by legal authorities to satisfy claims through exercise of a maritime lienC
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attemperator steam flow in the heater discharge circuit
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becauseB
thoughC
sinceD
until
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单选题In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system，there must be（）.A
fuelB
oxygenC
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考题
单选题The piping that routes an oil cargo from the manifold to underdeck pipelines is known as a （）.A
cargo fillB
line dropC
transferD
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考题
单选题On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.A
hydraulicB
electricC
steamD
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考题
单选题Disastrous explosions have been caused by accumulations of oil or oil vapour in air lines not drainedAccording to the above sentence, which of the following statements is true?（）A
Oil vapour in air piping are dangerousB
Explosion will cause oil vapouring in air linesC
Oil vapour in air piping should be drainedD
Oil in air piping should not be drained
考题
单选题Overcarriage is best prevented by（）.A
assuring heavy cargo is stowed low in the vesselB
checking the vessel's load line calculations carefullyC
inspection of the hold at completion of dischargeD
stowing the cargo which is to be discharged last on the bottom
考题
单选题In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.A
open and individual tank valves openB
open and the individual tank valves closedC
closed and the individual tank valves closedD
closed and the individual tank valves open
考题
单选题An inert gas system on a tanker should be used to（）.A
prevent the generation of flammable or combustible gas in tanksB
blow out cargo lines to prevent the build up of gas concentrationsC
dilute tank atmospheres to keep gas concentrations below the lower explosive limitD
prevent fires in the pumproom by continually displacing flammable vapors
考题
单选题An inert gas system on a tanker should be used to（）.A
prevent the generation of flammable or combustible gas in tanksB
blow out cargo lines to prevent gas concentrationsC
dilute tank atmospheres to keep gas concentrations below the lower explosive limitD
prevent fires in the pumproom by continually displacing flammable vapors
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