Engine: Electricity

1. A the normally closed hoist and lower contactor auxiliary contacts are interlock contacts preventing simultaneous pulling in both the hoist and lower contactors and the normally open contacts extend control power to the speed control circuits
2. B the normally closed and normally open hoist and lower contactor auxiliary contacts are interlock contacts preventing simultaneous pulling in both the hoist and lower contactors
3. C the normally open hoist and lower contactor auxiliary contacts are interlock contacts preventing simultaneous pulling in both the hoist and lower contactors and the normally closed auxiliary contacts extend control power to the speed control circuits
4. D the normally closed and normally open hoist and lower contactor auxiliary contacts extend control power to the speed control circuits

Tip: press A-D to answer