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Class 2 (2nd Engineer) MEKG 📅 Mar 2020

Exam Question

With regards to main transmission shaft flange coupling arrangements:

(a) Sketch a hollow type coupling bolt and the hydraulic head/nut and loading rod which are used to fit it;

(b) Describe how the bolt is fitted;

(c) State the advantage of the hollow coupling bolt as compared to the traditional type of coupling bolt.

Exam question diagram

Reference Answer

(a)
(b) The process of fitting a hollow coupling bolt into the main transmission shaft flange coupling:
A bolt with a diameter slightly larger than the flange coupling bore diameter (D + 0.00025D) is selected.
A push rod (loading rod) is inserted into the hollow coupling bolt, and a hydraulic head is attached.

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