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CH 9 COOLING SYSTEM OPERATION AND DIAGNOSIS

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CH 9 COOLING SYSTEM OPERATION AND DIAGNOSIS The upper radiator hose collapses when the engine cools. What is the most likely cause? A defective pressure cap A defective thermostat A defective upper radiator hose The spring is missing from the upper radiator hose which is used to keep it from collapsing - Correct Answer -A defective pressure cap What can be done to prevent air from getting trapped in the cooling system when the coolant is replaced? Pour the coolant into the radiator slowly. Use a coolant exchange machine that draws a vacuum on the system. Open the air bleeder valves while adding coolant. Either B or C - Correct Answer -Either B or C Heat transfer is improved from the coolant to the air when the ________. temperature difference is small temperature difference is great coolant is 95% antifreeze Both A and C - Correct Answer -temperature difference is great What type of pump is a typical water pump? Gear Vane Centrifugal Rotor - Correct Answer -Centrifugal

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