A. Copper-constantan
B. Aluminium-Chromel
C. Platinum-platinum + rhodium
D. None of these
Which thermocouple can be used to measure a temperature of around 1400°C ? Read More »
Process Control and Instrumentation A. pH value
B. Degree of hydrolysis
C. Composition of complex ions
D. All A., B. & C.
Which of the following measurements can be made by the measurement of emf ? Read More »
Process Control and Instrumentation A. Helium
B. Nitrogen
C. Hydrogen
D. None of these
A. 50
B. 100
C. 10
D. 1
A. 0.5/0.2
B. 0.2/0.5
C. 0.2 × 0.5
D. 1/√(0.2 × 0.5)
A. Is 30°
B. Is 90° at the most
C. Approaches 180° asymptotically
D. Is 120°
A. Reproducibility
B. Dead zone
C. Time lag
D. Static error
Which of the following is an undesirable dynamic characteristic of an instrument ? Read More »
Process Control and Instrumentation A. > 1.7 and > 30°
B. 30°
C. < 1.7 and 1.7 and < 30°
A. Greater safety of operation
B. Better quality of product
C. Greater operation economy
D. All A., B. and C.
Instrumentation in a plant offers the advantage of_______________? Read More »
Process Control and Instrumentation A. Low thermal conductivity
B. Low electrical conductivity
C. High viscosity index
D. Low flash point
