A PLC can perform which of the following math functions in addition to ADD, DIV, SUB, and MUL?

A PLC can perform which of the following math functions in addition to ADD, DIV, SUB, and MUL?

• A. SQR (Square Root)
• B. LOG
• C. SIN
• D. EXP

Answer: (A)

Many PLCs extend basic arithmetic with a small set of extra math functions. The square root function is a common, widely supported addition because it’s frequently needed in control and data processing and is often provided as a standard function block in the PLC’s library. This makes it the best choice for what a PLC can perform in addition to ADD, DIV, SUB, and MUL. Logarithms, sines, and exponentials exist in some systems, but they’re not as universally available across PLC families or may require more specialized libraries or hardware. They’re optional or less common compared to the standard square root function, which is why it’s the expected answer here.

Many PLCs extend basic arithmetic with a small set of extra math functions. The square root function is a common, widely supported addition because it’s frequently needed in control and data processing and is often provided as a standard function block in the PLC’s library. This makes it the best choice for what a PLC can perform in addition to ADD, DIV, SUB, and MUL.

Logarithms, sines, and exponentials exist in some systems, but they’re not as universally available across PLC families or may require more specialized libraries or hardware. They’re optional or less common compared to the standard square root function, which is why it’s the expected answer here.