There are standard temperature and pressure checks carried out by watch keeping engineers onboard ship. It is very important that the engineer on watch takes a walk around the engine room on taking over watch to scan through the various thermometer and pressure gauges component in other to ensure that the rouge value is spotted immediately either from the instrument board on the control station or on the component itself. By so doing, abnormal conditions can be arrested.
This is very important especially for cadets or trainee engineers who may not have had the opportunity of learning that in school, hence the purpose of this article.
Most often cadets or trainee engineers come across questions like this as it happened to me. At that moment I could only but shamefully ask to be helped with the answers.
It doesn’t mean these are the only checks to be carried out but are only classified to be very important and so the need for engineers to be fully aware of the checks to guide them in their day to day watch.
The 3 important checks to be carried out by engineers on assuming duty watch onboard ship are:
A rise or fall in the temperature of the exhaust gas could be caused by leaky valves seat, faulty fuel injector or a scavenge fire. The reason watch keeping engineers are always advised to walk along the plates shining touch is to have a clear view on the pyrometers and provide the necessary remedy when there is variations in the temperature readings of the exhaust gauges.
Where such remedy cannot be provided the engineer on duty especially when it has to do with trainee engineers, alarm should be raised immediately to bring the attention of senior engineer(s) to the situation.
Cooling Water Temperature
On taking over duty, the temperature of cooling water must be confirmed accurate, monitored to prevent abnormal rise or fall as not to reduces the working efficiency of the circulation process or result in overheating.
Any rise or fall reduces the injector efficiency and perhaps loss of combustion should also ensure that water coolers helping the heat exchange process should is clean and control valves kept open as long as heat exchange process continues.
Lub-oil Temperature and Pressure
Lubricating oil coolers and filters plays predominant role in the heat exchange and filtration processes. Temperature rise causes pressure drop and pressure rise causes temperature drop and so must be controlled through the use of lub-oil coolers and it sea water inlet valve.
Bearings in the main engine runs hot with a sudden rise in temperature. Watch keeping engineers are advised to access thoroughly the temperature gauges and be sure they are at normal working conditions and to do same when handing over duty.