MEO Class II Exam Repetition Trends & Strategic Forecast

With respect to refrigeration gases used on board vessels: (a) Explain Ozone Depleting Potential (ODP) and Global Warming Potential (GWP) of conventional and alternative refrigerants. (b) Explain international regulations governing refrigerant discharge and phasing out.

Sketch a sealing arrangement for an oil-lubricated stern tube. Identify common forms of seal failure and state how oil loss due to seal failure can be limited while at sea.

(a) Describe the procedure for the inspection of an auxiliary boiler safety valve. (b) Describe the setting of safety valves under steam with surveyor. (c) Explain action taken by watchkeeper after setting.

Sketch and describe a "fail-safe steering gear" suitable for use on a tanker of more than 100,000 tonnes DWT. Explain the sequence of events following a sudden loss of hydraulic fluid in one system.

Sketch and describe the arrangement of a main engine camshaft chain. Describe the repair procedure following fracture of one chain link during voyage at sea.

(a) Sketch a main engine air starting distributor and describe how it operates. (b) List the safety devices and interlocks incorporated in main engine air starting systems.

With reference to mechanical/hydraulic governors: (a) Explain why flyweights are driven at higher rotational speed than the engine. (b) Explain how deadband is minimized and compensation is achieved.

With reference to piston rings: (a) State reasons for breakage and how maintenance minimizes breakage. (b) Explain the possible consequences of running an engine with broken piston rings.

(a) With the aid of a simple sketch, explain the "trouble spots" in a basic marine air-conditioning unit. (b) Explain how the problem of increased humidity and temperature is rectified.

What is a Rocking Test of a Deck Crane? Explain the complete procedure using dial indicators. Tabulate the fault finding procedure and state action taken if tilt deviation exceeds permissible limits.

With respect to the operation of a two-stage reciprocating air compressor, explain: (a) Causes of occasional lifting of 2nd stage relief valve. (b) Breakage of valve plates. (c) High discharge air temperature.

Under Continuous Survey of Machinery (CSM), the crosshead bearing of a large 2-stroke engine is due for survey. (a) Explain preparation and safety steps. (b) Detail clearance measurements and inspection checks.

(a) Compare the effectiveness of a current limiting circuit breaker with that of an HRC fuse. (b) Numerical calculation: A coil having resistance of 10 Ohm and inductance of 0.15 H connected across AC supply.

(a) Explain the significance of the root-mean-square (RMS) value of an alternating waveform. Define form factor. (b) Numerical on 3-phase alternator load, active power kW, and power factor improvement.

With reference to an emergency source of electrical power in cargo ships: (a) Describe a typical power source and starting arrangements. (b) Give a typical list of essential services supplied.

(a) Describe with a circuit diagram the Star-Delta starter for a 3-phase induction motor. (b) Explain why motor starting current is reduced and compare starting torque with Direct-on-Line.

Explain how the period of roll varies with: (a) The amplitude of roll. (b) The radius of gyration (k). (c) The initial metacentric height (GM). (d) The location of masses in the ship.

Describe the relationship between frictional resistance and: (a) Ship speed. (b) The wetted surface area. (c) The surface roughness. (d) The length of the vessel.

(a) Describe a method for the attachment of bilge keels to hull plating. (b) State THREE reasons for not extending bilge keels to the entire length of the vessel.

With reference to Underwater Inspection in Lieu of Drydocking (UWILD): (a) Explain how an underwater survey is conducted by divers/ROVs. (b) State class conditions, hull markings, and clearance checks required.

Name various Statutory Certificates and Documents to be carried on board Oil Tankers / Gas Tankers / Container Ships giving reference to international conventions and justify the requirement for each.

(a) Explain the principles underlying the STCW Convention. (b) Explain how as Second Engineer you would implement the regulations for controlling rest hours and preventing fatigue.

With reference to free-fall lifeboats of an ocean-going ship: (a) Periodical maintenance, tests, and checks on release gear. (b) Precautions during simulated launch and recovery.

With respect to hazardous areas on tankers: (a) Explain flameproof (Ex d), increased safety (Ex e), and intrinsic safety (Ex i). (b) State where each type of electrical equipment is installed.