Oil Tankers. Test 5

The static suction head of a pump is the _____

distance of the suction liquid level above the center line of the pump.
amount in inches of mercury the total suction head is below atmospheric pressure.
distance the suction liquid level is below the center line of the pump.
force necessary to overcome frictional losses in the pump and piping.

If a bonding cable is not connected by the terminal when joining a manifold for cargo operations _____

you should insert an insulating flange or single length of non-conducting hose
you should use an International Shore connection
you should use an oxygen analyzer at all times
you should not commence cargo operations

Which of these statements is correct concerning the starting of centrifugal pumps?

They should always be started with the discharge valve closed.
A priming pump is always required to flood the impeller suction.
They should always be started with the sealing line valves closed.
They should always be started with the discharge valve opened.

The simplest method to use for determining if a centrifugal pump is operating as designed is to _____

close off the discharge valve, and watch for a rise in pressure.
momentarily close off the suction valve, and watch for a rise in pressure.
use a clamp-on ammeter and compare the readings with past records.
closely observe the pump discharge temperature.

On tankers using hydraulic tank valve actuation, which of these valve types has the highest tendency to develop leaks relative to the valve, requiring more frequent maintenance?

Check valves.
Gate valves.
Butterfly valves.
Globe valves.

In spaces declared gas-free, further gas may be released _____

when the temperature of the sea water rises
after loose scale and sludge are disturbed
when oxygen levels become reduced
when water is loaded into the cargo tank

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Oil Tankers. Test 5

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