Exam Question
Related to diesel engines used on board, briefly explain following terms with sketches
(a) Piston Stroke (4)
(b) Compression Ratio (4)
(c) Natural Aspiration (4)
(d) Supercharging (4)
Class 4 (4th Engineer)
MEKM
📅 Nov 2022
Reference Answer
### (a) Piston Stroke
**Concept:**
The piston stroke, in a reciprocating internal combustion engine, is defined as the linear distance the piston travels from its uppermost position, known as Top Dead Centre (TDC), to its lowermost position, known as Bottom Dead Centre (BDC). It is a fundamental design parameter that, in conjunction with the cylinder bore diameter, determines the engine's displacement volume and significantly influences its operational characteristics.
**Details:**
**Concept:**
The piston stroke, in a reciprocating internal combustion engine, is defined as the linear distance the piston travels from its uppermost position, known as Top Dead Centre (TDC), to its lowermost position, known as Bottom Dead Centre (BDC). It is a fundamental design parameter that, in conjunction with the cylinder bore diameter, determines the engine's displacement volume and significantly influences its operational characteristics.
**Details:**
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