48 



UNITED STATES COAST GUARD 



In what length of time should the 

 steering engine be capable of putting 

 the rudder hard over from one side to 

 hard over to the other side? 



Describe the factors affecting the 

 steering effect of a right handed screw 

 propeller, when going ahead. 



What measures could you take to pre- 

 vent a vessel pounding heavily in a head 

 sea? 



Approaching a dock starboard side to, 

 in a right-hand single screw steamer 

 with moderate headway, what precau- 

 tions should be taken, before backing, 

 in order to prevent the bow from swing- 

 ing in toward the dock when the engine 

 is reversed? 



Can the guys of a boom be so posi- 

 tioned that they need not be slacked off 

 or hove in when raising or lowering the 

 boom? 



Describe the method of rigging booms 

 where two topping lifts are employed to 

 eliminate guys. 



What is the proper method of placing 

 cable clamps on wire rope? Would you 

 place the nuts used to fasten the "U" 

 bolts all on the same part of the rope, 

 or would you stagger the clamps alter- 

 nately? 



How would you turn the stern quickly 

 to port in a twin-screw vessel with 

 stemway and both engines going full 

 astern? 



In making a "hydro" report on the 

 sighting of a derelict, what information 

 would you endeavor to include? 



If a guy is rigged as shown in the 

 sketch, what is the effect? 



A 3 inch line has a breaking stress of 

 9000 pounds. Using a safety factor of 5, 

 what weight would you pick up with a 

 threefold tackle, considering loss of ef- 

 ficiency due to friction as 10 percent at 

 each sheave? 



With a right-handed single screw 

 backing, why is the stern forced to port? 



How should hatch beam or pontoon 

 slings be fitted for safety of personnel 

 handling them ? 



If a hook be straightened out, is it 

 safe to bend it back and then return it 

 to use? 



What is the deck line on ocean and 

 coastwise vessels? 



Note: This question refers to the loadline 

 markings of a vessel. 



What is the maximum weight per 

 draft permitted when loading explosives 

 in accordance with the Regulations? 



Does a knot in a manila line increase 

 or reduce the breaking strength of the 

 line? 



C 



Using the rule of thumb B = — =^, where 



"B" is the breaking stress in tons and 



"C" is the circumference, determine the 



bi-eaking stress of a 3-inch manila line. 



Using the rule of thumb formula 



(-•2 



B = — — , where "B" is the breaking 



stress in tons and "C" is the circumfer- 

 ence, find the size of manila rope to use 

 to lift a 1-ton weight, when a factor of 

 safety of 7 is required. 



What is the required factor of safety 

 for lifeboat falls? 



