Refer to the circuit shown above. When the start button is pressed, motor ...

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Refer to the circuit shown above. When the start button is pressed, motor 1 starts immediately. After a delay of 5 seconds, motor 2 starts, but motor 3 never starts. Which of the following could

NOT cause this problem?

The 2M auxiliary contact connected in series with TR4 timer is defective and did not close.

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Timer TR4 is defective.

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3M starter coil is defective.

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CR relay is defective and not operating.

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