Set 15 MEO class 4 Epariksha online questions for MEK Motor

1. When using low sulfur fuel oil for Emission Control Areas (ECA???S), ideally the TBN of the cylinder oil used should be:
choose one Lower than normal Higher than normal Same as normal Same as normal if the feed is kept higher

2. For a two stroke engine two o-rings are provided on the liner. The function of the top o-ring is to ___________ and function of the lower o-ring is to ____________
choose one Seal jacket cooling water, act as secondary seal in case 1st o-ring leaks Seal jacket cooling water, Seal scavenge air Seal scavenge air, Seal Jacket cooling water Seal combustion gases, Seal jacket cooling water

3. The coating which is provided on the valve stem of exhaust valves of modern marine diesel engines is of:
choose one Nickel Stellite Chromium Nimonic

4. If the combustion control system of an automatically fired auxiliary boiler fails to sustain burner ignition after a normal shutdown, you should check for a/an
choose one faulty photocell detector low steam pressure high voltage on the ignition electrode open air damper

5. A large, low-speed, main propulsion diesel engine uses sea water to directly cool the
choose one cylinder heads exhaust valves scavenging air injectors

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Correct answers: