Set 5 Marine Engineering Knowledge online questions on motor paper

1. What prevents rotation and fretting between a thin shell bearing and its housing ?
choose one Location tangs or pegs The nip or crush of the bearing A special kind of adhesive Any of the above

2. Which of the following types of scavenging systems is most popular in modern engines?
choose one Loop scavenging Cross flow scavenging Uniflow scavenging Reverse scavenging

3. Which of the following can be a consequence of worn scraper rings and sealing rings of a piston rod stuffing box?
choose one Increased risk of scavenge fire Increased risk of crankcase explosion Increased Lube oil consumption All of the above

4. The superlong stroke slow speed 2-stroke diesel engines when compared to short stroke version gives
choose one Poorer propulsive efficiency but better fuel combustion Better propulsive efficiency but poorer fuel combustion Better propulsive efficiency as well as better fuel combustion Poorer propulsive efficiency as well as poorer fuel combustion

5. Coked material remaining after an oil has been exposed to high temperature, is an indication of the coke forming tendency of the oil. It can be expressed as
choose one Conradson Ramsbottom Micro Carbon Residue Any of the above

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