Question 3689 Deck General

The correct answer is B) two hours. According to the regulations for mobile offshore drilling units, each emergency generator on the unit must be run under a full load for at least two hours when tested. This ensures that the emergency generator can provide reliable backup power for an extended period in the event of a main power failure. The other answer choices are incorrect because one hour (A) is not long enough to fully test the generator's capabilities, while four hours (D) and ten hours (C) exceed the minimum requirement specified in the regulations.