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?

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

Explanation:

• Cadmium is toxic, so Technician A is wrong.
• Nickel - metal hydride batteries do have 2 - 3 times the energy density of nickel - cadmium batteries, so Technician B is correct.

Answer:

b. Technician B