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Part I: MCQs ( 0 x - Q 1 2 ) . Circle the correc answer ( 1 mark each. total 1 2 marks )
Part I: MCQs Circle the correc answer mark each. total marks
A process is initially at steady state with its output for an input The input is suddenly Aprocess is initially at steady state with its output for an input The transfer function of the changed to at time The output response is The process is
a
b
c
d
For twofirst order systems and connected in series. The damping coefficient of the resultant second order for the case
a
b
c
d
The closed loop poles of a stable second order system can be
a both real and positive
b complex conjugate with positive real part
c both real and negative
d one real positive and the other real negative
A first order system with unity gain and time constant is subjected to a sinusoidal input of frequency The amplitude ratio for this system is
a
b
c
d
In the case of a feed forward control scheme, which of the following is NOT true:
a Cannot cope with unmeasured disturbances
b It waits until the effect of the disturbance has been felt by the system before control action is taken
c Requires good knowledge of the process model
d Requires identification of all possible disturbances and their direct measurement
Temperature control of a exothermic chemical reaction taking place in a CSTR is done with the help of a cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are
a air to open valve with the controller direct acting
b air to close valve with the controller reverse acting
c air to open valve with the controller reverse acting
d air to close valve with the controller direct acting
For the time domain function the Laplace transform of is given by
a
b
c
d
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