ships measurement

Question 1

1. Archimedes´s principle: “ A ship displaces a volume of water that equal to its own weight.”

Answer 1

 The assertion is not correct. … displaces the weight of the watermass that is …

Question 2

2. Therefore a vessel will experience an upthurst that equal to the weight of the displaced water.

Answer 2

 The assertion is correct.

Question 3

3. When buoyancy is greater than gravity the vessel will float.

Answer 3

 The assertion is incorrect, because if the buoyancy is greater than the gravity, the vessel would fly.

Question 4

4. Displacement indicates the vessel´s contents

Answer 4

 The assertion is incorrect, because displacement indicates the vessel´s weight and all its contents.

Question 5

5. Gross tonnage equals the total volume of the vessel´s enclosed spaces.

Answer 5

 The assertion is correct.

Question 6

6. Net tonnage can be calculated by deducting the spaces that are used for cargo from the gross tonnage.

Answer 6

 The assertion is incorrect, because the net tonnage can be calculated by deducting the spaces that are not used for cargo from the gross tonnage.

Question 7

7. Harbour dues that must be paid are often calculated according to the net tonnage.

Answer 7

 The assertion is correct.

Question 8

8. By deadweight is understood the weight of the vessel and its contents

Answer 8

 The assertion is incorrect, because deadweight is the vessel´s total loading capacity.
 The deadweight is equal to the displacement minus the lightweight.

Question 9

9. “Length over all (LOA) is the total length of the vessel.

Answer 9

 The assertion is correct

Question 10

10. “Length Between Perpendiculars” (LPP) is measured between the fore-perpendicular and the aft-perpendicular.

Answer 10

 The assertion is correct.

Question 11

11. The fore-perpendicular is the vertical line through the intersection of the construction waterline and the stem.

Answer 11

 The assertion is correct.

Question 12

12. The aft-perpendicular goes through the rudderstock.

Answer 12

 The assertion is correct.

Question 13

13. By moulded breadth is meant the total breadth of the vessel.

Answer 13

 The assertion is incorrect, because the moulded breadth is the horizontal distance between the vessel´s insides.

Question 14

14. The moulded depth is the vertical distance between the insides of the moulds.

Answer 14

 The assertion is correct.

Question 15

15. By beam is meant the extreme breadth of the vessel.

Answer 15

 The assertion is correct

Question 16

16. Draft is the distance from the bottom of the keel to the seabed.

Answer 16

 The assertion is incorrect, because the draft is the distance between the bottom of the keel and the waterline.

Question 17

17. Air draft is the distance from the seabed to the highest point of the vessel.

Answer 17

 The assertion is incorrect, because the air draft is the vertical distance between the waterline and the highest point of the vessel.

Question 18

18. Freeboard is the distance between seabed and waterline.

Answer 18

 The assertion is incorrect, because the freeboard is the vertical distance between the waterline and the main-deck.

Question 19

19. Underkeel Clearance (UKC) is the distance between keel and surface of the water.

Answer 19

 The assertion is incorrect, because the underkeel clearance is the vertical distance between the bottom of the keel and the seabed.