Candidates Name:

Ports and Maritime Organization Seafarer's Examination and Certification Directorate

Exam Code: CMSC - 892 Subject: Ships Construction Date: Rank: Chief Mate (GT3000) Time allowed: 2.5 Hrs

(Pass marks: 55) Q.1) - Explain the requirements for the followings as per condition of

assignment of freeboard: a) Ventilators. (7 marks) b) Cargo ports and other side openings in the hull. (7 marks) c) Air pipes. (6 marks)

Q.2) - Describe four methods of heat treatment of steel in ship building. (Each 5 marks)

Q.3) - a) With aid of simple sketch explain electro chemical reaction in producing

corrosion. (10 marks) b) Describe the impressed current system used as a corrosion protection for steel ships. (10 marks)

Q.4) a) Describe briefly the non-destructive tests commonly used in assessing and testing the quality of a weld. (10 marks)

b) When carrying out welding in ship construction, distortion of the joint is a common problem. Discuss this and show how it can be overcome in practice. (10 marks)

Q.5) a) Explain with aid of diagrams that how the water-tightness and strength of a

watertight bulkhead are maintained where longitudinal passes through it. . (10 marks) b) Describe the testing requirements of a watertight bulkhead for tightness. (10 marks)