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.Management Sciences
Category: Process Control and Instrumentation
The operation of a Rotameter is based on ________________?
0
A. Variable flow area
B. Rotation of a turbine
C. Pressure drop across a nozzle
D. Pressure at a stagnation point
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an_______________?
A. Chromel-alumel thermocouple
B. Optical pyrometer
C. Radiation pyrometer
D. Either B. or C.
In an exothermic chemical reactor, the manipulated variable is the flow rate of_______________?
A. Coolant
B. Reactants
C. Product
D. None of these
Thermal wells used in temperature measurements should have __________________?
A. Very thick walls
B. Low emissivity
C. Polished surface
D. High transmissivity of radiation
Helium gas constant volume thermometer is suitable for the measurement of a temperature of ______________ °C?
A. < 100
B. < 0
C. > 0
D. > 800
Humidity of air can be determined by a__________________?
A. Chromatograph
B. Sling psychrometer
C. Mass spectrometer
D. Polarimeter
Pressure of 0.0001 absolute psi can be measured by _____________ gauge?
A. Mcleod
B. Pirani
C. Thermocouple
D. None of these
Which of the following measurements can be made by the measurement of emf ?
A. pH value
B. Degree of hydrolysis
C. Composition of complex ions
D. All A., B. & C.
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit ?
A. Seebeck effect
B. Peltier effect
C. Joule heating effect
D. Thomson effect
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