Final answer:
It is true that a car tire's air pressure can only be accurately measured when the tires are cold. Measuring tire pressure when cold provides the most accurate reflection of the tire’s optimal pressure as per manufacturers' specifications. Heat generated from the car being driven can temporarily inflate tire pressure readings.
The Correct Option is; a. True.
Step-by-step explanation:
The statement that a car tire's air pressure can only be measured accurately with an air pressure gauge when the tires are cold is true. When air is pumped into a tire, the tire's volume increases initially with minimal increase in the tire pressure.
However, once the tire is fully expanded, and as the car is driven, the pressure in the tires increases due to the heat generated by the motion and friction. Tire gauges are designed to measure gauge pressure, which is the pressure in a system above atmospheric pressure, and read zero at atmospheric pressure.
Most manufacturers recommend specifying optimal tire pressure for when the tires are cold to ensure safety and maintain the longevity of the tires.
It is true that a car tire's air pressure can only be accurately measured when the tires are cold. Measuring tire pressure when cold provides the most accurate reflection of the tire’s optimal pressure as per manufacturers' specifications. Heat generated from the car being driven can temporarily inflate tire pressure readings.