I appreciate any help here. Please prvide brief explinaion . Thank you! (1) A te

Question

I appreciate any help here. Please prvide brief explinaion . Thank you!

(1) A temperature sensor produces 10 mV for each degree Fahrenheit. Determine the temperature reading if 30 mV of noise is added to the sensor output signal when the actual temperature is 72 degrees.

(2) Which statement is true in a Delta-Delta connected three-phase system?

(3) Which of the following statements are true for a closed-loop control system? Select all that apply.

(4) In the ladder logic program given below, what number will be stored in register R300 when all operations are performed?

70 degrees ADD Constant 18 Source1 Constant 21 -Source 2 R100 Destination MUL R100-Source 1 Constant 2-Source 2 R200 Destination SUB R200 Source 1 R100 -Source 2 R300 Destination

Explanation / Answer

1) the actual temperature read is 72° degrees. But due to noise 30mv is added in the sensor. As mentioned in first line for every 10mv 1° gets added.

So temperature read is 72°+ 3°= 75°degrees ( option D).

2) In delta to delta connection is a 3 wire connection with no neutral. In Delta connection the line voltage is equal to phase voltage but the load Voltage may not be equal to line to line voltage because their might be line drop in lines.

So option A their is no neutral current is right.

3) A closed loop system is that the output automatically adjusts to the preset values by using the feedback.

In the below options all the options comes under closed loop system. So all the above are true.

4) at R100= 18+21= 39

at R200= 39*2= 78

At R300= 78-39= 39.

So 39 is the answer.

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