SPECIMEN EXAMINATION FOR CHIEF MATE 



75 



What is the height of the center of 

 gravity of the hold shown? (The hold 

 has rectangular form). 



Three hundred tons of one-half inch 

 steel plate with a stowage factor of 7 

 are stowed across the bottom of a cargo 

 hold measuring 60 feet by 40 feet. At 

 what height is the center of gravity of 

 the parcel of cargo above the inner 

 bottom? How could you raise the height 

 of the center of gravity and facilitate 

 discharge? 



A vessel loads a bulk cargo which 

 may shift under bad weather conditions. 

 She is not required by regulations or ac- 

 cepted stowage rules to provide shifting 

 boards. What precautions may be taken 

 to minimize danger? 



How can you estimate the tendency 

 to shift of a bulk commodity? Discuss 

 the factors that may influence the tend- 

 ency of a cargo to shift. 



Slabs of copper are to be loaded each 

 of which is 12 inches wide, 12 inches 

 long, and 4 inches high. Each slab 

 weighs 110 pounds. How high might this 

 commodity be stowed in a 'tween deck 

 whose allowable load per square foot is 

 450 pounds? 



How would you stow citrus fruit 

 packed in the type crate illustrated? 



A lot of special cargo on a pier is to 

 be loaded. You examine one of the 

 identical cartons of the lot which is 

 marked as sketched. 



a. What is the purpose of the 

 marking? 



/^ 



b. What is the total cubic space the 

 consignment will occupy? 



Note: 22/25 on the carton sketched indicates 

 this to be the 22nd piece of a total of 25 pieces 

 or cartons of the lot. 



iliiRECIFE 





TJifiS 



What are three basic methods of pro- 

 tecting personnel when stowing radio- 

 active materials? 



Why is cargo stowed in 'tween decks, 

 on decks, and in the wings of the hold 

 more likely to shift than cargo in the 

 lower hold? 



What precaution is advisable when 

 bulk cargo is stowed in the 'tween 

 decks? 



What is the principle of operation of 

 a combustible gas indicator? 



What precautions would you observe 

 in order to assure proper readings from 

 a combustible gas indicator? 



