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During fueling operations with the Beta-Freightliner R-12 Hydrant-Servicing Unit, the deadman switch must be re-activated, to prevent automatic shutdown, every ________.

User Bizzarrus
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Final answer:

The deadman switch must be re-activated every 30 seconds during fueling operations with the Beta-Freightliner R-12 Hydrant-Servicing Unit.

Step-by-step explanation:

During fueling operations with the Beta-Freightliner R-12 Hydrant-Servicing Unit, the deadman switch must be re-activated, to prevent automatic shutdown, every 30 seconds.