Class 2 (2nd Engineer) MEKM 📅 Jan 2021

Exam Question

Suggest with reasons, which one or combination of the following conditions is likely to contribute most to persistent breakage/slacking of 'holding down' bolts:

(a) A scavenge fire.

(b) Small cracks in the transverse girder of the bedplate.

(d) Loose chocks.

(e) Partially balanced reciprocating masses.

(f) One piston hung up.

Reference Answer

Likely Contributors to Persistent Breakage or Slacking of 'Holding Down' Bolts:
(a) A Scavenge Fire:
A scavenge fire affects the area around the scavenge space and the lower part of the liner. This area is far from the holding-down bolts and has little direct impact on them. While a severe scavenge fire may cause thermal distortion in the liner or adjacent components, it is not likely to significantly contribute to persistent breakage or slacking of holding-down bolts.
(b) Small Cracks in Transverse Girders of the Bedplate:

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