Cargo Handling and stowage Flashcards
The distance between the surface of the liquid and the tank top in a cargo tank is called __________
Ullage
Oil may NOT be transferred unless __________.
discharge containment equipment (i.e. drip pans) are in place
Cargo transfer operations on a tank vessel need NOT be stopped when __________.
a tug comes alongside while the tanker is loading grade D and E cargoes
Litmus paste is used in order to determine
Thievage
Oil product samples should be taken from the __________.
Dock rise, Ship’s cargo tanks, or shore tank discharge
When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery, check it __________.
one half the ullage of the tank and one meter below the tank top
Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because __________.
a subsequent temperature rise will cause the cargo to overflow
Which factor must be considered when determining the order of loading of dissimilar products through the same piping system aboard a tanker?
Contamination of the cargo
When loading a tanker, you should __________.
close valves by closing them down, reopening one or two turns, and re-closing
A vessel loads edible oil in a deep tank through a manhole at the mid-length of the tank. In order to fill the tank to maximum capacity, what trim should the vessel have?
In level trim
The terminal indicates to you that they are going to use a booster pump to assist the discharging operation. You start the discharge, and in a few minutes the pressure drops sharply. This could be a result of the __________.
booster pump coming on the line and discharging properly
When stripping a tank, excessive air in the suction line may cause __________.
loss of suction
While discharging a tanker, list can be controlled by __________.
using wing tanks near the longitudinal center, discharging as necessary
When discharging an oil cargo, the first consideration is to __________.
get the bow up
You are on a tankship discharging oil. When all of the oil that the main cargo pumps can handle is pumped out of a tank, the remainder is __________.
stripped to one tank and then pumped out with the main pumps
While discharging a cargo, the stripping of the tanks falls behind schedule. This would indicate the __________.
main pumps are leaving too much oil in the tanks
The complete details of a crude oil washing system aboard your vessel, including the operating sequences and procedures, design characteristics, a description of the system, and required personnel will be found in the __________.
Crude Oil Washing Operations and Equipment Manual
You have completed a crude oil wash. What action should be taken with the oil in the lines running to the washing machines?
Open a COW nozzle forward and one aft and drain the line into the after tank by gravity
The designations A, B, C, D, and E grades of cargo refer to the __________.
flash point range and Reid vapor pressure index of petroleum products
A petroleum liquid has a flash point of 85° F. This is a grade __________.
D combustible liquid
Butadiene, inhibited, is labeled as a __________.
flammable gas
You may be able to avoid loss of suction in a pump by __________.
using a full tank to keep the pump primed, opening the vent cock on the pump, closing down on the tank valve
To insure proper seating when closing a valve on a tank, the valve should be __________.
closed, opened a half turn, and then closed again
What is the purpose of the relief valve of a cargo pump?
Permits the return of cargo to the suction side of the pump
