Exam Question
(a) How is a 2-Stroke engine started?; Describe the sequence of engine starting. (6)
(b) Draw Timing Diagram of engine starting, showing crank position of each step. (6)
(c) What is OVERLAP in engine starting. (4)
Class 4 (4th Engineer)
MEKM
📅 Dec 2023
Reference Answer
(a) ### How a 2-Stroke Engine is Started and Sequence of Starting (6 Marks)
The starting of a large, 2-stroke marine diesel engine is accomplished using high-pressure compressed air, typically at 25-30 bar. The entire process is a logically sequenced and interlocked operation to ensure safety and reliability.
**Pre-starting Conditions (Interlocks):**
Before any starting sequence can be initiated, several preparatory steps and safety interlocks must be satisfied:
The starting of a large, 2-stroke marine diesel engine is accomplished using high-pressure compressed air, typically at 25-30 bar. The entire process is a logically sequenced and interlocked operation to ensure safety and reliability.
**Pre-starting Conditions (Interlocks):**
Before any starting sequence can be initiated, several preparatory steps and safety interlocks must be satisfied:
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play