50 



UNITED STATES COAST GUARD 



In loading adjacent tanks with dis- 

 similar products ; would you top off your 

 second tank at level "A," "B" or "C"? 

 Why? 



A vessel preparing to load grain has 

 four small hatches installed as sketched 

 at "A," "B," "C" and "D" in her 'tween 

 deck. What is their purpose? 



When a hold is completely filled with 

 loose grain in bulk, what quantity must 

 be contained in feeders for that hold? 





T A N K 1 



T A N K 2 



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How many gallons are there in a 

 United States barrel? 



Prior to loading Grades "A," "B," or 

 "C" cargoes, what precautions are 

 necessary with respect to boiler and 

 galley fires? 



With respect to the danger of fire and 

 explosion of liquid petroleum cargoes, 

 why are greater precautions usually 

 necessary when loading than when dis- 

 charging? 



A locomotive weighing 32 tons is 

 stowed on its 4 wheels, each of which 

 has an area of one foot resting on the 

 deck. 



(a) What is the load per square 

 foot on the deck if the locomotive's 

 weight is equally distributed on the 4 

 wheels? 



(b) If the deck capacity is 400 

 pounds per square foot, how could the 

 weight be distributed? 



What protection against fire is neces- 

 sary where cowl deck ventilators feed 

 directly into a magazine or a hold in 

 which explosives are stowed? 



On vessels carrying mail, is it permis- 

 sible to break bulk prior to discharging 

 of the mail in ports of the United 

 States? 



Would you consider the stowage of 

 boxed cargo better at "A," making use 

 of all possible space, or at "B" where 

 the successive tiers are kept level? State 

 your reason. 



How many long tons are there in 100 

 metric tons if a metric ton is .98421 long 

 tons? 



Explain what is meant by optional 

 cargo and state the care necessai-y in 

 the stowage of such cargo. 



When trimmers are employed on bulk 

 cargoes, what precautions should be 

 taken to insure that none have been 

 walled off by cargo in the hold? 



A vessel has a fresh water allowance 

 of 8 inches. A hydrometer reading taken 

 in a sample of water in which she is 

 loading reads 1015. How far below her 

 salt water draft may she load due to 

 allowance for fresh water? 



In stowing carboys of acid, which are 

 not completely boxed, what is the maxi- 

 mum number of tiers permitted? 



Why is the top planking of bins con- 

 structed for deck cargo required to be 

 of sturdy construction? 



