Engine 2014: Electricity

1. A When power ventilation is required, the ventilation may be accomplished by a ventilation system that serves other spaces.
2. B When power ventilation is required, blower blades must be nonsparking and the system must be interlocked with the battery charger to prevent simultaneous operation.
3. C When power ventilation is required, blower blades must be non-sparking and the system must be interlocked with the battery charger to prevent charger operation unless the ventilation fan is running.
4. D Power and lighting batteries must be of the lead-acid type  only.

Tip: press A-D to answer