Engine 2014: Electricity

1. A the normally closed "R" and "F" auxiliary contacts and the normally closed, time closed "RCR" and "FCR" contacts are all instantaneous interlocks, requiring stopping in one direction before starting in another direction
2. B the normally closed, timed closed "RCR" and "FCR" auxiliary contacts are instantaneous interlocks, requiring stopping in one direction before starting in another direction, whereas the normally closed "R" and "F" contacts require a time- delay associated with coast down after shutting down in one direction before allowing starting in the opposite direction
3. C the normally closed "R" and "F" auxiliary contacts are instantaneous interlocks, requiring stopping in one direction before starting in another direction, whereas the normally closed, time closed "RCR" and "FCR" contacts require a time-delay associated with coast down after shutting down in one direction before allowing starting in the opposite direction
4. D the normally closed "R" and "F" auxiliary contacts and the normally closed, time closed "RCR" and "FCR" contacts all require a time-delay associated with coast down after shutting down in one direction before allowing starting in the opposite direction

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