NVQ L3 Construction Equipment Operator Practice Questions - Sri Lanka NVQ Level 3 Construction Equipment Operator Exam

Why is it dangerous to open a pressurized radiator cap on a hot engine during a pre-start or maintenance check?

It will cause the diesel fuel to ignite instantly The sudden drop in pressure will damage the water pump impellers Boiling coolant and steam can spray out under pressure and cause severe burns It will cause air locks that require bleeding the entire fuel system

Correct Answer:

Boiling coolant and steam can spray out under pressure and cause severe burns

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