Class 4 (4th Engineer) MEKM 📅 May 2024

Exam Question

(a) Describe the procedure for taking crankshaft deflections, explaing all precautions that must be observed (8)

(b) Explain what deflection readings actually mean and suggest the action which must be taken should readings be outside values recommended by the engine manufacturer (8)

Reference Answer

### (a) Procedure for Taking Crankshaft Deflections and Precautions
#### **1. Precautions Observed Before and During Measurement**
Safety and accuracy are paramount. The following precautions must be strictly observed:
* **Engine Condition**: The engine must be in a cold state. Readings taken when the engine is warm can be significantly different due to thermal expansion of the crankcase and bedplate, and will not be comparable to standard reference values. The provided context specifies to wait at least 20 minutes after stopping a running engine.

Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.

View plans Browse library

← Browse more questions

Prepare on Android — MeoMock on Google Play