Which one is NOT an disadvantage of Pneumatic Signals?

Which one is NOT an disadvantage of Pneumatic Signals?

a. Always lag or delay in the signal
b. Friction causes a decrease in the value of the signal
c. More expensive than electronic instruments
d. Cost of tubing is greater than electrical wiring
e. Ensuring a clean, dry air supply may be costly.




Answer: C

Which one is NOT an advantage of Pneumatic Signals?

Which one is NOT an advantage of Pneumatic Signals?

a. They are simple and provide trouble free operation
b. They can transmit over long distances
c. Less expensive than electronic instruments
d. Safe in operation




Answer: B

The component of a control system that adjusts the value of the manipulated variable

The component of a control system that adjusts the value of the manipulated variable

a. Process variable
b. Final control element
c. Manipulated variable
d. Controlled variable
e. Transmitting variable





Answer: B

Indicates the value of the variable (pressure, level, or flow) being monitored or recorded on a chart for future reference.

Indicates the value of the variable (pressure, level, or flow) being monitored or recorded on a chart for future reference.

a. Transmitter
b. Controller
c. Indicator
d. Recorder
e. Process variable



Answer: D