List of top Chemical, Thermal and Polymer Engineering Questions on Biochemical Engineering asked in Common University Entrance Test

The lower limit of the useful working range of a transducer is determined by its:
A. error
B. noise
C. accuracy
D. stability

Microprocessor-based systems which are increasingly being used for dedicated applications in process instrumentation are:

Dynamic response of a system consists of:
A. steady state response only
B. transient state response only
C. unsteady state response only
D. non-transient state response only

In a closed-loop system, the process to be controlled is an integrating process with a transfer function $\frac{1}{25}$. The controller proposed to be used is an integral controller with transfer function $\frac{1}{T4s}$. When a step change in the set point is applied to such a closed system, the controlled variable will exhibit:

When the damping coefficient is equal to 1 for a second-order system, then
A. both the roots will be equal
B. both the roots will be real
C. both the roots will be complex
D. both the roots will be unequal

Routh test criterion:
A is applicable only to those systems with polynomial characterizatic equation
B. does not prove any information about the actual location of roots
C. is applicable only to those systems with non-polynomial characterizatic equation
D. Gives full information about the actual location of roots

Routh test cannot be used to test the stability of a control system containing:

The first-order thermometer used has a time constant of 50 s. If it is subjected to a sinusoidal input cycling at 0.002 Hz, then the time lag produced in the instrument will be:

Industrial paddle agitators turn at speed between:

Impeller diameter in the case of a turbine agitator is: