When must a thermostat be fully opened?
A)20 degrees Fahrenheit (11.1 degrees Celsius)above the "start to open temperature"
B)3 degrees Fahrenheit (1.67 degrees Celsius)above or below its temperature rating
C)3 degrees Fahrenheit (1.67 degrees Celsius)above its temperature rating
D)20 degrees Fahrenheit (11.1 degrees Celsius)below the "start to open temperature"

Question

Quizplus · Accepted Answer

A thermostat must be fully opened at 20 degrees Fahrenheit (11.1 degrees Celsius) above the "start to open temperature" to ensure proper engine cooling and to maintain the engine at its optimal operating temperature.

When Must a Thermostat Be Fully Opened