Exam Question
Q9
(a) Explain the action of EACH of the following metallurgical mechanism:
(10)
(i) Creep
(ii) Brinelling
(iii) Fretting
(b) State, with reasons, where EACH of the mechanisms in occur in ship propulsion System
(6)
Class 2 (2nd Engineer)
MEKG
📅 Mar 2026
Reference Answer
### Part (a): Explanation of Metallurgical Mechanisms
#### (i) Creep
**Concept:**
Creep is the time-dependent, permanent plastic deformation of a material subjected to a constant stress (or load) at elevated temperatures. This deformation occurs even if the applied stress is well below the material's yield strength at that temperature. It is a thermally activated process, becoming significant at temperatures exceeding approximately 40% of the material's absolute melting point (0.4 T_m).
#### (i) Creep
**Concept:**
Creep is the time-dependent, permanent plastic deformation of a material subjected to a constant stress (or load) at elevated temperatures. This deformation occurs even if the applied stress is well below the material's yield strength at that temperature. It is a thermally activated process, becoming significant at temperatures exceeding approximately 40% of the material's absolute melting point (0.4 T_m).
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play