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51.

__________directly converts temperature into voltage.(a) Thermocouple(b) Potentiometer(c) Gear train(d) LVDTI had been asked this question in an interview for internship.This is a very interesting question from Stability of Nonlinear System in division Nonlinear Systems of Control Systems

Answer»

Correct option is (a) THERMOCOUPLE

The best I can EXPLAIN: Among all the instruments Thermocouple is the instrument that has two different metals with different TEMPERATURES and the DIFFERENCE in temperature is converted into the potential difference.
Discussion
52.

For non-linear systems stability cannot be determined due to:(a) Possible existence of multiple equilibrium states(b) No correspondence between bounded input and bounded output stability and asymptotic stability(c) Output may be bounded for the particular bounded input but may not be bounded for the bounded inputs(d) All of the mentionedI got this question in an interview for job.Origin of the question is Stability of Nonlinear System in chapter Nonlinear Systems of Control Systems

Answer»

Correct answer is (d) All of the mentioned

The EXPLANATION: For non-linear systems stability cannot be determined as asymptotic stability and BIBO stability CONCEPTS cannot be applied, existence of multiple STATES and unbounded OUTPUT for MANY bounded inputs.
Discussion
53.

The term backlash is associated with:(a) Servomotors(b) Induction relays(c) Gear trains(d) Tacho generator.This question was posed to me by my school principal while I was bunking the class.The query is from Common Physical Nonlinearities in chapter Nonlinear Systems of Control Systems

Answer»

The CORRECT OPTION is (c) GEAR trains

The BEST EXPLANATION: The term backlash is associated with Gear trains.
Discussion