When the inert gas pressure is being ______ in the cargo tanks，particular attention should
A. topped up
B. braced
C. tommed down
D. shored
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Which statement is TRUE concerning deep well self-priming pumps ________．
A. When loading oil cargo，it is always loaded via the discharge line through to the pump until the tank is topped off
B. Stripping systems are generally eliminated for the purposes of cargo handling
C. In recent years deep well pumps have become increasingly unpopular in product tankers and medium size crude ships
D. There is no danger of damaging the pump from overheating
Which statement is TRUE concerning insulating flanges ________．
A. They should be inspected and tested periodically to ensure that the insulation is clean and in good condition
B. Switching off a cathodic protection system may be substituted for using an insulating flange
C. The measured resistance value after installation should be less than 1，000 ohms
D. After the insulating flange is installed，hot work may be performed on deck
You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．
A. There must be two portable toxic vapor detectors on board
B. The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volume
Cargo temperature may be taken by portable thermometers
D. The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
Which statement is TRUE concerning cargo hose on tank barges ________．
A. Cargo hose must be able to withstand the shut-off head plus the static head of the cargo pump
B. Cargo hose must be able to withstand the static head of the cargo pump but no less than 100 psi
Cargo hose must be able to withstand the shut-off head less the static head of the cargo pump but no less than 100 psi
D. Cargo hose must be able to withstand at least 150 psi
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