Question 99Electricity/Electronics - Assistant Engineer70% to pass
Assuming that the electrolyte has had sufficient time to be uniformly diffused throughout the cell, if the open-circuit cell voltage as measured by a digital multimeter is 2.12, what would be the approximate specific gravity?
AI Explanation
The correct answer is C) 1.280.
The open-circuit cell voltage of 2.12 volts corresponds to a specific gravity of approximately 1.280 for a lead-acid battery under normal conditions. This relationship between open-circuit voltage and specific gravity is well-established in the regulations and guidelines for the U.S. Coast Guard Captain's License Examinations.
The other answer choices are incorrect because they do not accurately reflect the specific gravity associated with a 2.12 volt open-circuit cell voltage. A specific gravity of 1.260, 1.270, or 1.290 would not be the appropriate match for the given voltage measurement.
Related Questions
#97 Which of the following statements describes the effects of ambient temperature on local action within lead-acid storage batteries? #98 To keep emergency lead-acid batteries in a full state of charge for emergency use, what is normally done? #100 With regard to the maintenance of electrical generating machines with insulated pedestal bearings, what practice should be avoided? #101 In performing routine maintenance of a ship's service alternator, what should be included? #102 How may chattering of the collector/slip ring brushes on a generator be remedied?