Exam Question
(a) What is Indicator Diagram of a 2-Stroke Engine. (4)
(b) Draw an indicator diagram, mark each step of the cycle in the diagram. (6)
(c) What is Mean Effective Pressure and how its value is obtained from indicator diagram. (6)
Class 4 (4th Engineer)
MEKM
📅 Jun 2023
Reference Answer
### (a) What is an Indicator Diagram of a 2-Stroke Engine?
An **Indicator Diagram** is a graphical representation of the relationship between the pressure inside an engine cylinder and the volume (or piston displacement) throughout one complete engine cycle. It is a fundamental diagnostic tool used by marine engineers to assess the performance and health of a marine diesel engine.
**Key Characteristics and Purpose:**
* **Performance Evaluation:** It provides a visual and quantifiable measure of the work done within the cylinder. The area enclosed by the diagram is directly proportional to the Indicated Power developed by that specific cylinder.
An **Indicator Diagram** is a graphical representation of the relationship between the pressure inside an engine cylinder and the volume (or piston displacement) throughout one complete engine cycle. It is a fundamental diagnostic tool used by marine engineers to assess the performance and health of a marine diesel engine.
**Key Characteristics and Purpose:**
* **Performance Evaluation:** It provides a visual and quantifiable measure of the work done within the cylinder. The area enclosed by the diagram is directly proportional to the Indicated Power developed by that specific cylinder.
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