Class 2 (2nd Engineer) MEKM 📅 Feb 2024

Exam Question

(a) Compare the advantages of forged and built-up crankshafts with special reference to the magnitude of the stresses in the cranks. (5)

(b) How would you check the deflections by means of a dial gauge through one revolution of the shaft? (4)

(d) How is the wear down measured? (3)

Reference Answer

(a) Comparison of Forged and Built-Up Crankshafts
Forged Crankshaft:
Forged crankshafts have a continuous grain flow throughout the shaft, providing greater material strength and reduced susceptibility to cracks or failures under high stress.
Being a single-piece construction, there is no shrink fit, eliminating the risk of slippage.

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