Cargo pump relief valves are piped to the（）.

How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?

A.With gooseneck vents

B.With warning signs

C.With flame screens

D.With pressure-vacuum relief valves

Valves on steam-smothering lines to cargo tanks shall be set with ______．

A.The master control valve shut and valves to individual cargo tanks shut

B.The master control valve open and valves to individual cargo tanks shut

C.The master control valve shut and valves to individual cargo tanks open

D.All valves open

After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?

A.The relief valves in the system should be readjusted

B.The filters and strainers should be checked frequently

C.All system pressure should be readjusted

D.The system should be drained and renewed with a fluid of different operating characteristics

All of the following steps are taken in starting a centrifugal pump，EXCEPT to ______．

A.Set the relief valve

B.Check the lubrication system

C.Vent the pump casing

D.Open the pump suction and discharge valves

What is the purpose of the relief valve of a cargo pump ________．

A.Provides for the removal of vapors

B.Allows two or more tanks to be filled at the same time

C.Provides for the emergency shutdown of the pump

D.Permits the return of cargo to the suction side of the pump

Cargo pump relief valves are piped to the ______．

A.cargo pump pressure gauges

B.crossover lines interconnecting two pumps

C.suction side of pumps

D.atmosphere through pump vents

What is the purpose of pressure-vacuum relief valves ________．

A.Regulation of discharge pressure from cargo pumps

B.Maintaining constant velocity in cargo lines

C.Regulation of suction head on cargo pumps

D.To maintain a tank or void at atmospheric pressure

A fire pump may be used for other purposes if ______.

A.the other services are run off a reducing station with a pressure gage

B.one of the required pumps is kept available for use on the fire main system at all times

C.no relief valves are installed

D.all of the above conditions are met

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

C.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

You start a centrifugal cargo pump to discharge cargo．The pump works for a while and then loses suction．This could be caused by ______．

A.The pump running backwards

B.Incomplete priming

C.The discharge head being too high

D.All of the above