03000CH302052002 Pages: 3

Reg No.: Name:

Max. Marks: 100

b)
2 a)
b)
3 ஐ

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Sixth Semester B.Tech Degree Regular and Supplementary Examination July 2021

Course Code: ೮11302
Course Name: PROCESS DYNAMICS AND CONTROL

Require normal & semilog graph sheet
PARTA
Answer any two full questions, each carries 15 marks.
Consider an exothermic first reaction occurring in a CSTR and reactor is provided

with cooling jacket. Explain the concept of stable and unstable systems and the

need of controller to stabilize the process.

02.

Solve —>
at

+2242x=2 = x(0)=x'(0)=0
Sketch the function

‎=(t- YU(t-1) +2 (४ - 1) - (t - 3)U Ct - 3) - 4U(t - 4)‏ ) ر
‎and express the function the in s-domain.‏
‎A liquid level system has an external area of 5 ர்‌. The valve characteristic, flow‏
‎is the flow rate in m*/min and h is the level in‏ و ‎—head relation is = 101/7 . where‏
‎m. Calculate the time constant of this system if the operating level is‏
‎a. Sm b. 10 m.‏
‎i) Consider a mercury manometer with tube diameter 0.63 cm. Assuming the‏
‎flow in the manometer to be laminar and steady. Determine a transfer function in‏
‎standard second-order form between the applied pressure P; and manometer‏
‎reading h.‏
‎List a. Steady state gain‏

‎b. Time constant, t

‎c. Damping factor, € (8)
ii) For this mercury manometer if the steady state pressure reading is 15.25cm and
the applied pressure is suddenly increased to 20.32 cm. Length of the mercury
column is 122 cm. What is the peak reading and at what time does it pass first

‎20.32 cm. The value of density and viscosity are 13.5 (ണ്‌ and 0.016 g/cm. sec.

‎(7)

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‎Duration: 3 Hours

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