Michigan Mechanic Certification- HVAC Study Guide Exam And Actual Answers.
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Course
Michigan Mechanic Certification
Institution
Michigan Mechanic Certification
Cooling system leak diagnosis - Answer Pressure test or dye test
Purpose of a radiator - Answer The purpose of the radiator is to dissipate heat that is picked up by coolant in the engine into the air passing through its fins and tubes
Symptoms of low coolant - Answer Engine overheat...
Michigan Mechanic Certification- HVAC
Study Guide Exam And Actual Answers.
Cooling system leak diagnosis - Answer Pressure test or dye test
Purpose of a radiator - Answer The purpose of the radiator is to dissipate heat that is picked up by
coolant in the engine into the air passing through its fins and tubes
Symptoms of low coolant - Answer Engine overheating and no heat from the HVAC system
Purpose of the thermostat - Answer The purpose of the thermostat is to trap the coolant in the engine
until it reaches it operating temperature
Cause of low heater output - Answer Low coolant level, clogged heater core, leaking heater core
Heater core hose routing - Answer The supply hose from the heater core should run from the closed
side of the thermostat to the heater core and the return hose should run from the heater core to the
engine
Heater core operation - Answer The blower motor blows air through the heater core fins and is
warmed through the principle of conduction
Heater control valve purpose - Answer This valve controls the flow of the coolant to the heater core to
control the temperature of the air desired by the operator
Radiator cap testing - Answer To test pressure test it using an adapter and a coolant pressure tester and
the value marked on the pressure cap
Reciever drier purpose - Answer May contain a filter or strainer to catch and trap foreign particles and
dirt
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