During ICE operation when the coolant expands and pressure in the closed coolant system increases, what component allows excess pressure to vent to prevent system damage?
A) Vacuum valve in the radiator cap B) Pressure relief valve in the radiator cap
C) External electronic pressure regulators D) None of these
Question 2
Technician A says that electric cooling fans do not control engine temperature as precisely as an engine driven fan with a thermostatic fan clutch. Technician B says that some electric cooling fans use pulse width modulation to control airflow across the radiator coils. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
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