What is the purpose of depressing the S1 pushbutton ___

Refer to the drawing of a valve motor control circuit (see figure below).

What is the purpose of depressing the S1 pushbutton?

A. To deenergize the K3 relay after the initiating condition has cleared.
B. To prevent energizing the K3 relay when the initiating condition occurs.
C. To manually energize the K3 relay in the absence of the initiating condition.
D. To maintain the K3 relay energized after the initiating condition has cleared.

Show Answer

Answer: A

Share your understanding of this question with the correct explanation.