______ valves Operates to avoid the collapse of the radiator.(a) pressure(b) inlet(c) outlet(d) vacuumI got this question in unit test.Origin of the question is Components of Water Cooling System in division Cooling System of Automotive Engine Design

______ valves Operates to avoid the collapse of the radiator.(a) press

1.	______ valves Operates to avoid the collapse of the radiator.(a) pressure(b) inlet(c) outlet(d) vacuumI got this question in unit test.Origin of the question is Components of Water Cooling System in division Cooling System of Automotive Engine Design
Answer» RIGHT option is (d) vacuum Easy explanation: When the vacuum is CREATED inside the vacuum valves OPERATES and stops the collapse it usually operates when the vacuum exceeds about 5Kpa.

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