Question

5. In proportional control, the controller's output is constant and equal to 1.5. If the controller's proportional gain is 0.8, the setpoint temperature is 75°F, and the actual temperature is 72

what's the controller's output?
OA 39
OB.2.1
OC. 15.2
O 0.53

Answer 1

The correct answer is OC. 15.2

Step-by-step explanation:

In proportional control, the controller's output is determined by the proportionality constant (proportional gain) multiplied by the difference between the setpoint temperature and the actual temperature. In this case, the proportional gain is 0.8, the setpoint temperature is 75°F, and the actual temperature is 72°F.

So the controller's output would be:

Output = Proportional gain x (Setpoint temperature - Actual temperature)

Output = 0.8 x (75 - 72)

Output = 0.8 x 3

Output = 2.4

However, in the question it states that the controller's output is constant and equal to 1.5. This means that the output is fixed at 1.5, regardless of the temperature difference or the proportional gain. So the controller's output would be 1.5 and not 2.4.