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.Management Sciences
Category: Process Control and Instrumentation
Volumetric expansion is the working principle of the ______________ thermometers?
A. Mercury in glass
B. Constant volume gas
C. Vapor pressure
D. Bimetallic
The inverse Laplace transform of the function f(S) = 1/S (1 + S) is_________________?
A. 1 + et
B. 1 – et
C. 1 + e-t
D. 1 – e-t
Working principle of disappearing filament type optical pyrometer is based on the ________________?
A. Wien’s law
B. Seebeck effect
C. Kirchoff’s law
D. Peltier effect
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere ?
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Copper-constantan
D. Chromel-alumel
Specific gravity of a liquid cannot be measured by a/an __________________?
A. Anemometer
B. Specific gravity bottle
C. Pycnometer
D. Hydrometer
Emission spectroscopy is used for__________________?
A. Solids and metal analysis
B. Determining water purity
C. Determination of CO2 in gases
D. NOx determination
____________ stability method uses open loop transfer function?
A. Nyquist
B. Mikhailov
C. Ruth
D. None of these
A negative gain margin expressed in decibels means a/an ____________ system?
A. Stable
B. Unstable
C. Critically damped
D. None of these
Radiation pyrometers as compared to thermocouples____________________?
A. Has a slower speed of response
B. Can measure higher temperature
C. Can’t measure the temperature of moving objects
D. Is more affected by corrosive atmosphere
A non-linear system will have _____________ steady state values?
A. One
B. More than one
C. Two
D. Three
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