Cooling system 2

Technician A says 1975 Chevrolet K1500 requires Organic coolant straight from the farm. Technician B says heater cores are radiator like devices inside the dash for consumer operation. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

Customer comes into shop complaining about overheat condition at idle and poor air conditioning performance. Technician A says to check freon level before diagnosing air conditioning operation. Technician B says to verify customer concern before attempting to diagnose any repair. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

Thermostat operation is:

• Fully open at indicated temperature

• a flow control valve

• /can be controlled by the ECM depending on year and manufacturer

• All of the above

Technician A says fan clutches are designed to aid in cooling the engine at idle. Technician B says engine overheating at idle is only from low coolant level. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

Technician A says a thermometer inserted into the coolant reservoir can be used to determine the engine operating temperature. Technician B says a scan tool can be used to read the engine operating temperature. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

On a standard car and truck engine what type of cooling is used?

• air cooling
• liquid cooling