The time constant of a first order process with resistance R and capacitance C is__________________?

A. Specially designed thermocouple
B. Optical pyrometer
C. Radiation pyrometer
D. None of these

A. 180° – phase lag
B. Phase lag – 180°
C. Phase lag + 180°
D. Phase lag + 90°

A. Tubular reactor
B. CSTR
C. On-off controller
D. None of these

A. 250
B. 500
C. 750
D. 1000

A. Isotonic solutions
B. Solids
C. Liquids
D. Gases

A. Time taken by the controlled variable to reach 63.2% of its full change
B. Same as transportation lag
C. Same as dead time
D. Time required by the measured variable to reach 63.2% of its ultimate change