Exam Question
(a) What are the different types of crankshaft used in marine diesel engines? (10)
(b) Discuss the various factors affecting the failure of crankshafts in marine diesel engine (6)
Class 4 (4th Engineer)
MEKM
📅 May 2024
Reference Answer
### (a) Types of Crankshafts in Marine Diesel Engines
Based on the method of construction, crankshafts for marine diesel engines are broadly classified into four main types:
1. **Solid Single-Piece Crankshaft**
* **Construction**: Forged or cast as a single, continuous piece from a steel billet. This process ensures an uninterrupted grain flow, which follows the contour of the journals, webs, and pins, providing maximum strength and fatigue resistance.
Based on the method of construction, crankshafts for marine diesel engines are broadly classified into four main types:
1. **Solid Single-Piece Crankshaft**
* **Construction**: Forged or cast as a single, continuous piece from a steel billet. This process ensures an uninterrupted grain flow, which follows the contour of the journals, webs, and pins, providing maximum strength and fatigue resistance.
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play