SPECIMEN EXAMINATION FOR CHIEF MATE 



77 



26. CHANGE IN DRAFT DUE TO DENSITY. 



A vessel loads a full cargo at a dock 

 where the hydrometer floats at 1012. To 

 what draft will she have to be loaded so 

 as to draw 23 feet, 6 inches, when she 

 gets to sea? 



How would you determine the ap- 

 plicable load line for a port? 



Determine the displacement in sea 

 water of a vessel which has a loaded 



draft of 24 feet, length along the load 

 water line of 450 feet, beam at the load 

 water line of 56 feet, and a block co- 

 efficient of .8. 



How would you determine the load 

 line in fresh water for a vessel loading 

 to winter or Winter North Atlantic 

 Load Line? 



28. LIFESAVING APPARATUS AND FIREFIGHTING 



What precautions would you take in 

 handling boats equipped with releasing 

 gear which operates under tension 

 (Rottmer gear) ? 



Where passenger vessels are fitted 

 with loud speaker systems, how often 

 do the Regulations require that the sys- 

 tem be tested? 



How often must the emergency light- 

 ing and power system be operated and 

 inspected? State the test required for 

 internal combustion engine driven gen- 

 erators and storage batteries on pas- 

 senger vessels. 



How often must watertight doors in 

 subdivision bulkheads be operated on 

 passenger vessels? 



How often must watertight doors in 

 subdivision bulkheads be inspected on 

 passenger vessels? 



Describe the lowering of lifeboats at 

 the vessel's annual inspection. 



What is the total weight used for 

 weight-testing lifeboats and davits at 

 annual inspection? 



On cargo vessels of over 500 gross 

 tons on international voyages, when the 

 lifeboat deck is more than 30 feet above 

 the light load line, what do the regula- 

 tions require for launching a boat in 

 the hours of darkness? 



Sketched below are three typical fire 

 alarm system thermostats. 



(a) Describe briefly what causes 

 such thermostats to actuate an alarm. 



(b) When the system is de-ener- 

 gized or the power on it fails, how is the 

 officer on watch alerted? 



(c) How are such thermostats 

 tested? 



EQUIPMENT. 



Do the Passenger Vessel Regulations 

 permit the dismantling of lifeboats or 

 rafts for maintenance work at sea or 

 when passengers are aboard? 



In ordering or purchasing equipment 

 for lifesaving purposes aboard ship, 

 how would you determine if they were 

 approved by the Coast Guard? 



What markings are required on pas- 

 senger vessels to direct the passengers 

 to their lifeboat embarkation stations? 



Can life presei-vers be laundered or 

 repaired, and if so, under what condi- 

 tions? 



A vessel has a beam of 60 feet. The 

 distance from the davit span to the 

 light water line is 40 feet. What is the 

 required length of the lifelines fitted to 

 the davit span? 



How may you determine if cleaning 

 oils, disinfectants, and waxes are ap- 

 proved for use aboard vessels? 



How are persons in the engine or fire 

 room warned of the release of carbon 

 dioxide gas? 



How are passenger vessels required 

 to mark lifeboat stations on the em- 

 barkation deck? 



What precautions do the Regulations 

 for Passenger Vessels pi-escribe with 

 respect to painting? 



How often must the fuel tanks be 

 emptied and the fuel changed in motor 

 lifeboats carried aboard passenger 

 vessels? 



How often must all life floats be 

 cleaned and thoroughly overhauled? 



Is it permissible to use fire hose for 

 washing down the decks? 



