Question

technician a says quartz crystals under mechanical stress will produce a voltage. technician b says the piezoelectric principle is used in coolant temp sensors. who is correct? select one: a. technician a b. technician b c. both techs a and b d. neither technician a nor b

Explanation:

• Technician A: Quartz crystals exhibit the piezoelectric effect. When under mechanical stress (such as being squeezed or deformed), they produce a voltage. This is a well - known property of quartz crystals.
• Technician B: Coolant temperature sensors typically use thermistors (which change resistance with temperature) or other temperature - sensing principles like the expansion of a material. The piezoelectric principle is not used in coolant temperature sensors. The piezoelectric principle is more relevant in applications like pressure sensors (where mechanical stress is converted to electrical signal), ultrasonic transducers (where electrical signals are converted to mechanical vibrations and vice - versa for generating and receiving ultrasonic waves).

Answer:

a. Technician A