Rung No.3 contains the logic that:
A)detects when the temperature drops below the low set point.
B)allows the thermocouple temperature to be monitored by the LED display board.
C)detects when the temperature rises above the high set point.
D)switches the heaters on and off.

Question

Rung No.3 contains the logic that: 
A)detects when the temperature drops below the low set point. 
B)allows the thermocouple temperature to be monitored by the LED display board. 
C)detects when the temperature rises above the high set point. 
D)switches the heaters on and off.

Quizplus · Accepted Answer

Rung No.3 contains the comparison between the current temperature reading (from the thermocouple) and the high set point. If the current temperature is higher than the high set point, the output will be true, indicating that the temperature has risen above the desired level.

Rung No.3 Contains the Logic That