Internet of Things (IoT) Practice Exam

Which type of converter would be appropriate for measuring the temperature with high accuracy in a chemical process over a range of 100 degrees?

1. A. 8 bit

2. B. 10 bit

3. C. 16 bit

4. D. 32 bit

The correct answer is: B. 10 bit

When measuring temperature in a chemical process with high accuracy over a range of 100 degrees, a 10-bit converter provides a suitable balance between precision and complexity. A 10-bit analog-to-digital converter (ADC) can represent 2^10, or 1024 discrete values. When this range is applied to a 100-degree measurement span, it translates to a resolution of approximately 0.1 degrees (100 degrees / 1024 values). This level of resolution is typically adequate for many chemical processes, allowing for accurate temperature readings without being overly complicated or costly. Higher-resolution converters, such as a 16-bit or 32-bit option, offer finer granularity with much greater number of discrete values (65,536 for 16-bit and over 4 billion for 32-bit), which may be excessive for many applications that do not require such precision. While these higher resolutions can lead to better measurement accuracy, they also require more processing power, memory, and can introduce complexity into the system that may not be necessary for the temperature range specified. An 8-bit converter, while less complex, only provides 256 discrete values, resulting in a resolution of around 0.39 degrees over the same 100-degree span. This