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.Management Sciences
Category: Process Control and Instrumentation
The function of a transducer is to _______________ ?
A. Modify the input signal
B. Amplify the input signal
C. Convert the primary signal into a more useful quantity, usually an electric impulse
D. Codify/decodify the input signal
Nichol’s chart deals with __________________?
A. A.R. vs. phase lag of first order
B. A.R. vs. phase lag of second order
C. Closed loop values vs. open loop values
D. Frequency response values of controllers
A pyrheliometer is an instrument used for measuring the_________________?
A. Bright sunshine period
B. Beam radiation
C. Diffuse radiation
D. None of these
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?
A. Chromel-alumel
B. Iron-constantan
C. Platinum-platinum + rhodium
D. Either A., B. or C.
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
Which of the following is not a second order instrument ?
A. Mercury in glass thermometer with covering
B. Bare mercury in glass thermometer
C. Pressure gauge with one bellow, two tubes and a tank
D. None of these
Response of a linear control system for a change in set point is called __________________?
A. Frequency response
B. Transient response
C. Servo problem
D. Regulator problem
In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit__________________?
A. Overdamped response
B. Underdamped response
C. Undamped response
D. Unstable response
Stability of a control system containing a transportation lag can be best analysed by_______________?
A. Routh test
B. Root locus methods
C. Frequency response methods
D. None of these
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