Q1. Discuss the causes of vibration and noise in main gearing and describe detrimental effects on machinery and operating personnel. How would you detect the source(s) of this vibration and how might it be reduced to tolerable limits?
Q6.a) Define the cause and effect of thermal stressing in cylinder heads, liners, and pistons.
Explain why thermal stressing is aggravated with an increase in the cylinder bore.
Explain how stress concentration and it's effects is relieved by maintenance and operational practices.
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