56 



UNITED STATES COAST GUARD 



When mechanical equipment, such as 

 that sketched, is used to discharge bulk 

 cargoes : 



(a) What damage to ship's struc- 

 ture can be caused and how is it 

 averted ? 



(b) In the event that damage is 

 noted, what measures should be taken 

 by the ship's officers? 



How would you make a lee side for a 

 lighter while lying at anchor? 



How would you stow on deck carboys 

 containing corrosive liquids? 



What type of cargo can be handled 

 by the method of single whip and skid, 

 as illustrated? 



In the event that leakage, occurred 

 from carboys of corrosive liquids stowed 

 on deck, what steps should be taken? 



What is the meaning of the term "on 

 deck protected" as applied to dangerous 

 cargoes? 



Given a dry bulb temperature of 75° 

 and a wet bulb temperature of 62.5° 

 find: 



(a) Relative humidity. 



(b) Dew point. 



Define an "inflammable solid". 



Define an "oxidizing material". 



What care is necessary during the 

 voyage when transporting a cargo of 

 explosives or other dangerous articles? 



Would you use dark or light colored 

 tarpaulins or awnings to protect com- 

 pressed gases in cylinders from direct 

 rays of sun? Why? 



When a vessel is carrying inflam- 

 mable liquid cai-go on deck or in the 

 holds, what precaution must be taken 

 to warnof the danger? 



What signals must be displayed by a 

 tank vessel during transfer of bulk 

 cargo? 



\Vhen a tank vessel is fast to a dock 

 during transfer of cargo, what warning 

 must be given persons approaching the 

 gangway? 



What precautions must be taken 

 against operation of the radio equip- 

 ment when Grades "A," "B," or "C" 

 liquids are being transferred? 



Why are vessels engaged in the car- 

 riage of refrigerated cargoes usually 

 painted white and provided with wooden 

 decks over the refrigerated spaces? 



