$($a$)$ Consider an industrial environment in which multiple sensors are used to collect data from one machine itself. Explain how the data is acquired and manipulated in control rooms.

$($b$)$ Suggest a protection circuit to avoid damage to machines due to high current or high voltage.

OR

$($c$)$ Consider a gear cutting machine in working condition in a manufacturing company. For the said application, suggest:

a$)$ Sensor to measure temperature and pressure in the given working environment in a long$-$lasting manner.

b$)$ A filter to be used. out of these which one is suitable and why $?$ low pass, high pass $,$ band pass, band stop