GATE NM case studies
GATE NM · Put your knowledge to work in context.
GATE Naval Architecture and Marine Engineering (GATE NM) is a national postgraduate engineering entrance examination in India, one of the discipline-specific papers of the Graduate Aptitude Test in Engineering. A qualifying GATE score is used for admission to postgraduate programmes in naval architecture and ocean engineering, and it is also accepted by many public-sector undertakings for recruitment. The GATE NM case studies are 5 cases and about 3,564 words.
1Heavy-Lift Crane Lift with a Slack Ballast Tank
A 12,000 t displacement heavy-lift ship is preparing to lift a 250 t package from the quay with its own centreline-mounted crane. The ship's solid KG is 6.40 m and KM is 7.80 m; one ballast tank is slack with a free-surface moment of 2,400 t·m.
721 words, about 4 min2Model-Test Powering Prediction and Margin Stacking
A 180 m, 21.3 kn feeder container ship is being powered from a 1:30 scale model test. At the corresponding ship speed of 10.95 m/s, the 2.0 m model has a wetted area of 3.50 m² and a measured total resistance of 38.0 N in fresh water.
727 words, about 4 min3Deck Plating Wastage and Plate Buckling at Midship
A 32,000 dwt bulk carrier is in its third special survey. At midship, the deck plating between continuous longitudinals is nominally 14.0 mm thick, with longitudinals at 850 mm spacing and transverse frames at 2.4 m spacing.
704 words, about 4 min4Sea-Water Cooling Pump Fouling, Flow and NPSH
A sea-water cooling pump serves the central coolers of a 12,000 kW diesel installation. At rated speed its characteristic is H = 42 − 0.00035Q², where H is head in m and Q is flow in m³/h.
706 words, about 4 min5Hydrogen-Assisted Cracking in a Thick EH36 Deck Butt Weld
A 40 mm thick EH36 deck butt weld is being made in a shipyard in winter. The joint uses a SMAW root and FCAW fill/cap, with 280 A, 26 V and 300 mm/min travel.
706 words, about 4 min