Refer to the circuit shown above. Assume that both of the normally closed F and R contacts had been connected normally open. What would be the logic of the circuit?

Refer to the circuit shown above. When the jog button is pressed, the motor does not start. When the start button is pressed, the motor starts and continues to run. Which of the following could cause the problem?

Referring to A in the above figure, when the jog ____.

Referring to the circuit shown above, if all motors are operating and the stop pushbutton is pressed, ____.

Refer to the circuit shown above. Is the circuit electrically or mechanically interlocked?

Refer to the circuit shown above. What is the purpose of the dashed lines drawn between the pushbuttons?