Class 2 (2nd Engineer) MET 📅 Sep 2025

Exam Question

(a) Describe Ingress protection rating and types of insulation. (6)

(b) A total load of 8000 kW at 0.8 power factor is supplied by two alternators in parallel. One alternator supplies 6000kW at 0.9 power factor. Find the kVA rating of the other alternator and the power factor. (10)

Reference Answer

Ingress Protection (IP) Rating
Ingress Protection (IP) Rating is an internationally recognized standard defined by IEC 60529 . It classifies and rates the degree of protection provided by electrical enclosures against:
Solid foreign objects (dust, tools, fingers, etc.)
Water/ moisture ingress

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