Exam Question
(a) How is a 2-stroke engine started? Describe the sequence of engine starting (5)
(b) Draw the Timing Diagram of engine starting, showing crank position of each step (6)
(c) What is OVERLAP in engine starting (5)
Class 4 (4th Engineer)
MEKM
📅 Mar 2023
Reference Answer
### (a) Sequence of Starting a 2-Stroke Marine Diesel Engine
The starting of a large 2-stroke marine diesel engine is a precisely controlled sequence using high-pressure compressed air. The process ensures a safe, reliable, and directional start.
**1. Pre-start Conditions & Interlocks:**
* The engine is at a standstill with the turning gear disengaged and confirmed physically removed.
The starting of a large 2-stroke marine diesel engine is a precisely controlled sequence using high-pressure compressed air. The process ensures a safe, reliable, and directional start.
**1. Pre-start Conditions & Interlocks:**
* The engine is at a standstill with the turning gear disengaged and confirmed physically removed.
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