76 



UNITED STATES COAST GUARD 



Three compartments of equal volume 

 as sketched are available to carry a 

 cargo of quick- frozen fruit on a long 

 voyage. The only point that must be 

 considered is the economy of refrigerat- 

 ing plant operation during the voyage. 

 Which of the three would you select? 

 Explain your answer. 



A cargo of gasoline has a coefficient 

 of expansion of .0006 per degree Fahr- 

 enheit. If this cargo is loaded at a 

 temperature of 60° F., and cargo tem- 

 peratures up to 74° F. are anticipated 

 on the voyage, how many barrels would 

 you leave out in a tank whose capacity 

 is 10,000 barrels, in order to allow for 

 expansion? 



When a vessel which is fitted with 

 heating coils in her tanks is carrying 

 light fuel such as kerosene or gasoline, 

 what precautions should be taken to 

 eliminate any possibility of contaminat- 

 ing boiler feed, inspection tanks, heat- 

 ing pipe lines, etc.? 



When carrying chilled beef suspended 

 from hooks in the overhead of a re- 

 frigerated compartment, where is the 

 center of gravity of the compartment? 



What care is necessary in the success- 

 ful carriage of chilled beef suspended 

 from hooks? How shbuld such beef be 

 stowed ? 



Describe briefly the automatic con- 

 trols used in refrigerated compartments 

 to regulate temperature and humidity. 



What check is advisable by the cargo 

 officer and/or refrigerating engineer on 

 automatic temperature and humidity 

 controls? 



What shipping papers relating to the 

 cargo are required on board a loaded 

 tank vessel or vessel towing a loaded 

 tank vessel and what information must 

 be afforded by such papers? 



Would you permit scaling of the deck 

 or hull adjacent to a hold where cargo 

 is being worked? Why? 



How would you load "A," 50 feet long 

 and 5 feet deep, into hatch "B" which 

 is 45 feet long? Answer in detail 



Describe the precautions you would 

 take to protect passengers from injury 

 on vessels working cargo. 



A vessel has a dead weight carrying 

 capacity of 5,000 tons and a cubic ca- 

 pacity of 300,000 cubic feet. How much 

 of each of the following commodities 

 should she load to be full and down to 

 her marks? 



Lead .... Stowage Factor.... 18 

 Cotton . . Stowage Factor. ... 80 



Describe briefly the dangers that may 

 arise when carrying goods of a hygro- 

 scopic nature. 



What are the requirements for a gen- 

 eral average? 



What inspection of cargo equipment 

 is required by the Master of a vessel 

 prior to loading explosives? 



Is the Master of a vessel empowered 

 to reject the equipment for loading ex- 

 plosives furnished by a contracting 

 stevedore? 



A vessel has a dead weight carrying 

 capacity at load displacement of 10,500 

 tons. Fuel, water, and stores require 

 1,500 tons. Her cubic capacity is 500,000 

 cubic feet. What is the average stowage 

 factor of a cargo that she could carry 

 that would put her "full and down"? 



Describe at least two methods em- 

 ployed on vessels for determining the 

 relative humidity in a cargo hold. 



When stowing a commodity which is 

 very dense, such as pigs of lead or flasks 

 of mercury, what precautions should be 

 taken to avoid structural damage to the 

 ship? 



Hov7 is a cargo vessel loaded in order 

 that she may have quick dispatch at 

 several ports of discharge? 



Outside air has a dry bulb tempera- 

 ture of 70° and a relative humidity of 

 70 percent. Would there be any danger 

 of condensation if a cargo with a sur- 

 face temperature of 65 degrees is venti- 

 lated with outside air? 



(a) Would you consider sweat 

 likely on the side of a ship with a sea 

 water temperature of 38°, an air tem- 

 perature in hold of 54° drybulb, and 45° 

 wet bulb ? 



(b) Would you ventilate if outside 

 air was 60° dry bulb, 52° wet bulb? 



A vessel with a beam of 50 feet has 

 a freeboard of 10 feet on her high side 

 and a list of 5°. What is her mean free- 

 board if the low side is not accessible to 

 measure the freeboard? 



What precautions would you take to 

 avoid excessive strain on your vessel 

 while loading bulk cargo? 



