cat60y

Q2. (a) State why bottom end bolts of four-stroke engines are susceptible to failure.

Q2. (b) Sketch a bottom end bolt of suitable design.

Q2. (c) Explain how good design reduces possibility of failure.

Q2. (d) State how the possibility of failure is reduced by good maintenance.

1. (a) State the ideal cycle most appropriate to the actual operations undergone in the modern diesel engine.

(b) Give reasons why the actual cycle is made approximate to the ideal heat exchange process.

(c) State how the combustion process in the actual cycle is made approximate to the ideal heat exchange process.

Main Switch Board or MSB to be installed on a raised platform.
The location where Switch Board or MSB is installed should have good ventilation, illumination and affected by minimum vibration.
No water or oil pipes should pass above the Switch Board or MSB.
There should be adequate space around allowing comfortable operation ans maintenance.
The…[Read more]

MSB Safeties

Minimum 3mm rubber mat (approved and certified) in front as well as back of switchboard.
Dead front-end switchboard.
Insulated door handles (Ebonite)
Panel doors are also earthed.
Can’t open door, if breaker is closed.
No pipeline to pass in vicinity.
Minimum 1m free air surrounding switchboard.
Short circuit protection (ACB g…[Read more]

More advice from others:

1. Try to focus more on holding the conversation confidently with the examiner. Which also means concentrate less on thinking is the answer right or wrong.
2. When going for COC 5, the prior experience is just Engine Cadet so the amount of knowledge and experience will naturally be limited. When answering, it’s good…[Read more]

Updated with 2022 questions

Unknown examiner (Motor)
– Bilge system: Assignment 008
Draw/explain system
Explain normal operation
Explain Abnormal operation (water rising above bilge wells)
Explain Emergency bilge sea suction
SOLAS requirements for such valve.
Which MARPOL Annex falls under?
Explain/draw Non-return globe valve
Function of compound…[Read more]