In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the ______________ variable?

A. Coolant
B. Reactants
C. Product
D. None of these

A. Open
B. Closed
C. Either A. or B.
D. Neither A. nor B.

A. Wien’s law
B. Seebeck effect
C. Kirchoff’s law
D. Peltier effect

A. Polarimeter
B. Polarograph
C. Spectrometer
D. Refractometer

A. R + C
B. R – C
C. RC
D. 1/RC

A. Temperature measuring range (- 40°C to 450°C)
B. Accuracy (± 1% of span)
C. Speed of response
D. All a, b & c