Skip to main content

Motor and Mep

Motor and MEP -
*Creep failure
*Caustic embrittlement and in which part of boiler it occurs.
*Different types of arrangements of bed plate.
*How does tie rod keep the 3 parts fixed. Asked to draw and show and asked how is it fixed on top and bottom, whether it pierces bed plate or not.
*How to prevent tie rod from vibrating.
*What is fatigue.
*What is brinnel hardness number and significance.
*Function of wear rings and lantern ring.
* NPSH- draw and explain  all components.
* rocker arm lubrication in 4-s engine.
* Difference between sfoc and specific cylinder oil consumption. Also asked the values on my ship.
* What type of engine, did not ask specs.
* Types of cylinder oil lubricators, functioning and what type on my ship.
* What is load dependent lubrication.
*How to purify control air on board.(removal of all impurities) after receiver.
Once i said dehumidifier, he asked functioning of dehumidifier.

Labels:

Comments

Post a Comment

Popular posts from this blog

Wire drawing effect

Wire drawing effect : It is erosion or scoring of valve seat and disc material of the valve . Causes : 1. Due to differential pressure across the valve . 2. Thermal and mechanical damages . Effects : Valve is unable to isolate the line and fails in sealing . Gas and liquid will leak from the wire and scratch like groove .
Post a Comment
Read more

Cross and loop scavenging Disadvantage

Cross scavenging Disadvantage 1. It requires longer  piston skirt to prevent exhaust gas and air leaks from the ports when piston is at TDC . Loop scavenging Disadvantage 1. Both exhaust port and scavenge port are at the adjacent side of the liner which causes temperature differential problem for the liner material . Hence , we are using mostly the uniflow scavenging which is having very lesser mixing and better scavenging efficiency. Source : DA Taylor
Post a Comment
Read more