Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Chromel-constantan
D. All will give the same output
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Chromel-constantan
D. All will give the same output
A. Roots of the characteristic equation should be real
B. Poles of the closed loop transfer function should lie in the left half of the complex plane
C. Bode plots of the corresponding open loop transfer function should monotonically decrease
D. Poles of the closed loop transfer function should lie in the right half of the complex plane
For a feed back control system to be stable, the _________________? Read More »
Process Control and Instrumentation A. Pressure
B. Volume
C. Viscosity
D. All A., B. and C.
A. Insulator
B. Conductor
C. Solid semi-conductor
D. Liquid semi-conductor
A. Voltage measuring
B. Temperature measuring
C. Temperature compensating
D. Both B. & C.
Thermistors are used in ____________ devices? Read More »
Process Control and Instrumentation A. Pointer
B. Bourdon tube
C. Bulb
D. None of these
The ____________ of a vapor pressure thermometer is a secondary element ? Read More »
Process Control and Instrumentation A. Load
B. Manipulated
C. Controlled
D. None of these
A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo electric pyrometer
A. Bright sunshine period
B. Beam radiation
C. Diffuse radiation
D. None of these
A pyrheliometer is an instrument used for measuring the_________________? Read More »
Process Control and Instrumentation A. Low loads
B. Temperature changes
C. Flow rate changes
D. None of these
On-off controllers are normally used for________________? Read More »
Process Control and Instrumentation