Question 64General Subjects - Assistant Engineer

70% to pass

As shown in figure "B" in the illustrated block diagram of a central operating system configured for supervisory control, what is the function of the block "ANALOG (A-D MUX)"? Illustration EL-0094

Diagram for USCG General Subjects Assistant: As shown in figure "B" in the illustrated block diagram of a central operating...
AA high-speed solid-state switching device called a multiplexer capable of scanning a large number of analog sensors in a short period of time and converting these to signals to digital values for processing by the CPU.
BA low-speed solid-state switching device called a multiplexer capable of scanning a small number of analog sensors in a long period of time and converting these to signals to digital values for processing by the CPU.
CA low-speed solid-state switching device called a multiplexer capable of scanning a small number of digital sensors in a long period of time and converting these to signals to analog values for processing by the CPU.
DA high-speed solid-state switching device called a multiplexer capable of scanning a large number of digital sensors in a short period of time and converting these to signals to analog values for processing by the CPU.
AI Explanation

The correct answer is A. The "ANALOG (A-D MUX)" block in the illustrated block diagram of a central operating system configured for supervisory control represents a high-speed solid-state switching device called a multiplexer. This multiplexer is capable of scanning a large number of analog sensors in a short period of time and converting these analog signals to digital values for processing by the CPU. The other answer choices are incorrect because they describe different types of multiplexer devices that do not match the characteristics of the "ANALOG (A-D MUX)" block as depicted in the diagram. Specifically, options B, C, and D describe low-speed, small-scale, or digital-to-analog multiplexer devices, which do not align with the high-speed, large-scale, and analog-to-digital functionality of the block in question.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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