Question

Bubbles of air in radiator is sign of _________ problem.

(a) cracked block

(b) blown head gasket

(c) seized block

(d) lack of engine oil

The question was posed to me in an international level competition.

My question is taken from Cylinder Block topic in section Engine Construction & Wheel Assembly of Automobile Engineering

Answer 1

Correct option is (b) blown head gasket

Easy explanation: Bubbles of air in radiator is sign of blown head gasket which is a rare case occurring in cylinder head for which remedy is replacement of gasket, which requires an elevated platform for lifting engine.