Question

technician a says that nickel - cadmium batteries are commonly used in automobiles due to the non - toxic nature of cadmium. technician b says that nickel - metal hydride batteries have two to three times the energy density of a nickel - cadmium battery. who is correct?

a. technician a
b. technician b
c. both technician a and technician b
d. neither technician a nor technician b

Explanation:

• Cadmium is toxic, so Technician A is wrong.
• Nickel - metal hydride batteries do have two to three times the energy density of nickel - cadmium batteries, so Technician B is right.

Answer:

B. Technician B