Vacuum Contact in CB

[mmacdonell]

9. Which of the following is not a type of contactor used in circuit breakers?
Your Answer: Electro-pneumatic
Correct Answer: Vacuum

How is Vacuum not a type of contactor used in CB's?

[Nick1234]

9. Which of the following is not a type of contactor used in circuit breakers?
Your Answer: Electro-pneumatic
Correct Answer: Vacuum

How is Vacuum not a type of contactor used in CB's?

I agree Vacuum contactor is a thing, but maybe they are using vacuum in the sense that you cannot DLRO across a vacuum. If so the question and answers are badly worded.

[mbaxter1]

9. Which of the following is not a type of contactor used in circuit breakers?
Your Answer: Electro-pneumatic
Correct Answer: Vacuum

How is Vacuum not a type of contactor used in CB's?

Isn't a contactor a device that is controlled by another voltage, like what you see in a motor starter? I didn't think circuit breakers had "contactors" except maybe in the control circuit.