CARGO HANDLING AND STOWAGE JULY "B"

1. CARGO HANDLING AND STOWAGE JULY "B"

2. 1. A ship displaces 7,000 tons while floating in fresh water. Find the displacement of the ship when floating at the same draft in water of density 1,015 kgs/m³ • A. 7,105 tons • B. 7,135 tons • C. 7,125 tons • D. 7,115 tons

3. 1. Solution: • New ΔNew Density • Old Δ Old Density • New Δ1,015 Kgs/m³ • 7,000 t 1,000 Kgs/m³ • New Δ = 7,000 tons x 1,015 Kgs/m³ • 1,000 Kgs/m³ • New Δ = 7,105,000 • 1,000 • New Δ = 7,105 Tons

4. 2. The words pipe, butt, tun and puncheon all refer to __________. • A. structural shape used in construction • B. various length of timber • C. the sizes of cask • D. viscosities of liquid cargoes

5. Tun can be: • An old British measurement of liquid. • A large cask for liquids, especially wine. • A measure of liquid capacity, particularly one equivalent to around 252 wine gallons (954 litres). • A large cask, particularly one holding a volume equivalent to 2 butts, or 252 gallons. • Puncheon, in the United States also called pon for brevity, is an old English unit of wine casks, holding about 318 litres. It is also known as tertian (from the Latin word for third), because three of it make a tun, and as the (wine) firkin.

6. STAVE PARTS OF A CASK BUNG HOLE BILGE BILGE HOOP QUARTER HOOP HEAD HOOP RIVET CANT HEAD CHIME CROSE STAVE JOINT

7. 3. The curvature of the deck in a transverse direction. It is measured between the deck height at the center and the deck height at the side. • A. sheer • B. base line • C. camber • D. moulded breadth

8. SHIP CONSTRUCTION B A C waterline A= Camber B = Tumble Home C = Freeboard E D = Beam E = Dead rise D

9. 4. Your vessel is at a dock where the density is 1,012. To what draft will she be loaded so as to draw 23’ 06” when she gets to sea where the density is 1,026? • A. 23’ 06” • B. 23’ 02” • C. 23’ 10” • D. 24’ 02”

10. 4. Solution: • New DraftOld Density • Old Draft New Density • New Draft1,026 Kgs/m³ • 23‘ 06” 1,012 Kgs/m³ • New Draft = (23.5’) x 1,026 Kgs/m³ • 1,012 Kgs/m³ • New Draft = 23.82’ or 23’ 10”

11. 5. A device that can tighten rigging by means of screw threads. • A. pelican hook • B. stretcher • C. rottmear releasing gear • D. turnbuckle

12. Pelican Hook Turnbuckles

13. 6. One of the principal dangers inherent in liquefied petroleum gas is ______. • A. The strong odor it produces • B. The way it reacts with seawater • C. As it warms up it becomes heavier than air • D. It’s low temperature causes frostbite or freezing

14. 7. For package freight, an average allowance for “broken stowage” is. • A. 15% • B. 30% • C. 60% • D. 5%

15. 8. Sweat damage in a hatch full of canned goods and cartons will occur when the. • A. Air temperature is higher than the temperature of the cargo • B. Dew point is lower than the temperature of the cargo • C. Dew point is higher than the temperature of the cargo • D. Air temperature is lower than the temperature of the cargo

16. 9. The difference between the initial trim and the trim after a loading change is known as. • A. final trim • B. change of trim • C. trim • D. change of draft

17. 10. What is the size of 24-strand wire necessary to lift 18 tons with a 3-fold purchase? • A. 2 inches • B. 4 inches • C. 3 inches • D. 6 inches

18. GEAR M.A. (Mechanical Adv. ) Single Whip/Purchase 1 Gun Tackle 2 Luff Tackle/ Handy Billy 3 Watch Tackle Double Purchase 4 Double Luff 5 Three Fold Purchase 6

19. 10. Solution: • S = Wt. x ( 1 + 10% N.O.S. ) • M.A. • S = 18 tons x 1.6 • 6 • S = 4.8 Tons

20. SWL = 2C² / 6 • C = √SWL x 6 • 2 • C = √4.8 x 6 • 2 • C = 3.8 inches

21. 11. Foam extinguishes fire by: • A. chemical action • B. inerting the air • C. cooling • D. smothering

22. 12. In regards to the center of buoyancy, which of the following statement is correct? • A. It moves toward the low side of an inclined vessel • B. It is the measure of metacentric height • C. It caused the displacement to increase • D. It moves toward the high side of an inclined vessel

23. 13. No vessel may use or carry an oil transfer hose larger than 3 inches unless it meets all of the following requirements EXCEPT: • A. Have a bursting pressure greater than 600 psi • B. Have a working pressure greater than 150 psi • C. Have a metallic reinforcement • D. Have identification markings

24. 14. You are making a heavy lift with the jumbo boom. Your vessel displaces 18,000 tons. The 50-ton weight is on the pier, and its center is 75 ft. to starboard of the centerline. The head of the boom is 112 ft. above the baseline, and the center of the gravity of the lift when stowed on deck will be 56 ft. above the baseline. As the jumbo takes the strain, the ship lists 3.5º. What is the GM when the cargo is stowed? • A. 3.24 ft. • B. 3.19 ft. • C. 3.40 ft. • D. 3.56 ft.

25. Given:Δ = 18,000 tons, Weight = 50 tons • KG = 75 ft (Stbd.) Centerline • Head of Boom= 112 ft. from Baseline • KG of cargo = 56 ft. (from baseline • when stowed on deck ), List = 3.5º • Find: GM when Cargo was Stowed • Solution: • Using the Inclining Experiment • Tan List = Wt. x Dist. • Δ x GM

26. GM = Wt x Dist. • Δ x Tan List • GM = 50 t x 75 ft. • 18,000 t x Tan 3.5º • GM = 3.40 ft. ( When Lifting ) • GG’ = Wt. x Dist. • Δ • GG’ = 50 t x 56 ft. • 18,050 t • GG’ = 0.16 ft. • GM = 3.40 ft. (-) • GM = 3.24 ft. ( When Stowed on Deck )

27. 15. The KG of a vessel is found by dividing the displacement into the: • A. Sum of the free surface moments of the vessel • B. Height of the center of gravity of the vessel • C. Sum of the longitudinal moments of the vessel • D. Sum of the vertical moments of the vessel

28. 16. A ship is loading in dock water of density 1,010 kgs/m³, F.W.A.150 mms. Find the change in draft on entering salt water? • A. 60 mms • B. 90 mms • C. 30 mms • D. 100 mms

29. Allowable Increase = FWA x (Change in Dens) • 25 • = 150 mms. x (1025 – 1010) • 25 • = 150 mms. X 15 • 25 • Allowable Increase = 90 mms.

30. 17. What is the Safe working load of 4-inch Manila rope? • A. 2.2 tons • B. 3.4 tons • C. 1.8 tons • D. 1.3 tons

31. 17. Solution: • SWL = C²(Occasional Lift) 7 • SWL = 4² 7 • SWL = 16/7 • SWL = 2.28 tons

32. 18. Form the foundation for the decks, they are situated athwartship from the side to side of the vessel. • A. girders • B. garboard strake • C. pillars • D. deck beams

34. 19. You have a quantity of bagged cargo to stow in #3 UTD. Which method of stow will provide minimum block stability? • A. Bag on bag stow • B. Alternate layer directions • C. Half bag stow • D. Bilge and cantline

35. Method of Stowing Bagged Cargo • 1. Full Bag Method = provide maximum ventilation.

36. 2. Alternate Layer Direction = provide • maximum Block Stability .

37. 3. Half Bag or Brick Method = provides minimum Broken Space.

38. 20. The purpose of setting the freeboard requirement is primarily to ensure that the ship has. • A. adequate load during voyage at sea • B. reserve of buoyancy • C. enough watertight doors and openings • D. enough freeboard after loading

39. 21.You are going to load bales of wool having a stowage factor of 100 in #3 lower hold which had a bale cubic of 62,000. How many tons of wool can be stowed in the compartment, assuming 10% broken stowage? • A. 520 • B. 654 • C. 620 • D. 558

40. 21. Solution: • Allowance = 100% - B.S 100 • Allowance = 100% - 10% 100 • Allowance = 90% 100 • Allowance = 0.9

41. 21. Solution: • Weight = Volume x Allowance • Stowage Factor • Weight = 62,000 ft³ x 0.9 • 100 ft³/ton • Weight = 55,800 ft³ • 100 ft³/ton • Weight = 558 Tons

42. 22. On the fully containerized ship, approximately one third or more of the cargo is on deck above the rolling center. Top stowed containers are subject to. • A. accelerations greater than on conventional vessels • B. accelerations the same as on conventional vessels • C. accelerations less than on conventional vessels • D. no accelerations

43. 23. When loading bulk liquid cargo, what is the first action you should take if a cargo valve is jammed open? • A. Order the dock man to shutdown • B. Call the owner, operator, or terminal supervisor • C. Trip the pump relieve valve • D. Run out the vessel’s or terminal’s fire hose

44. 24. If additional weight is added above the center of gravity, the vessel will: • A. reduce righting moments • B. all of these • C. reduce reserve buoyancy • D. increase GM

45. 25. Name one major advantage of transporting gas under refrigeration. • A. less product per volume • B. it reduces its volume • C. it increases its volume • D. none of these

46. 26. Which of the following is classified as a combustible liquid? • A. Tetraethylene alcohol • B. Carbon tetrachloride • C. Ethyl alcohol • D. Acetaldehyde

48. Grades of Petroleum Products • GradeFlash Pt.Reid Vapor • A. Flammable 80º F or 14 psi or • below above • B. Flammable 80º F or more than 8.5 • below less than 14 psi • C. Flammable 80º F or 8.5 psi or below • below • D. Combustible above 80º F but ---- • below 150º F • E. Combustible 150º F or above -----

49. 27. If a vessel is loaded in such manner that she is to be sagging, what kind of stress is placed on the sheer strake? • A. Tension • B. Thrust • C. Compression • D. Racking

50. 28. The upward slope of a ship bottom from the keel to the bilge is known as ___. • A. slope • B. dead rise • C. camber • D. keel height