Identify an unbounded input from inputs whose transfer functions are given below

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Question
Identify an unbounded input from inputs whose transfer functions are given below
Options
A. 1
B. 1/S
C. 1/S²
D. 1/(S² + 1)

Correct Answer

1/S²

Process Control and Instrumentation problems

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1. A sinusoidal variation in the input passing through a linear first order system
Options
A. becomes more oscillatory (frequency increases).
B. becomes less oscillatory (frequency decreases).
C. gets amplified (magnitude increases).
D. gets attenuated (magnitude decreases).

3. Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?
Options
A. Mercury in glass thermometer
B. Mercury in steel thermometer
C. Alcohol in glass thermometer
D. Fused metal (Na or K) in steel thermometer

4. Pick out the wrong statement
Options
A. Proportional controller is normally used for level control in industrial applications.
B. CSTR can be considered as a distributed parameter system.
C. Distributed parameter approach gives partial differential equation.
D. Non-linear behaviour is exemplified by an on-off controller.

5. Radiation pyrometers as compared to thermocouples
Options
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.

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