(SEM V) THEORY EXAMINATION 2023-24 INDUSTRIAL ELECTRONICS

Course: B.Tech (Semester V)

Subject Code: KEC052

Subject: Industrial Electronics

Maximum Marks: 100

Time: 3 Hours

Pattern:

Section A: 10 short answer questions × 2 marks = 20 marks

Section B: Attempt any 3 × 10 marks = 30 marks

Section C (Q3–Q7): Each has 2 options; attempt one from each × 10 marks = 50 marks

SECTION A – Short Answer Questions (2 × 10 = 20 Marks)

a. Write down any two applications of Power Transistors.
b. Define Latching Current.
c. Discuss SCR Triggering.
d. Differentiate between Opto-TRIAC and Opto-SCR.
e. Define Average Value of Voltage.
f. Describe the working of Feedback Diode.
g. Describe Induction Heating.
h. Name any two Pressure Transducers.
i. Discuss why Power Factor Control is necessary.
j. Discuss the need for Data Communication in Industrial Electronics.

SECTION B – Descriptive / Analytical Questions (Any 3 × 10 = 30 Marks)

a. Explain the operation and working of DIAC.
b. Describe construction and working of Opto-Isolators.
c. Explain working of Relay using Opto-SCR with a suitable block diagram.
d. Explain Timer Circuit using SCR.
e. Explain SCADA with a suitable block diagram and its applications.

SECTION C – Long / Application-Based Questions (Each 10 Marks)

Q3. Power Devices

a. Describe the working and constructional features of Power Transistors.
b. Explain construction and working of Power MOSFET.

Q4. Thyristors and Opto Devices

a. Explain Series and Parallel Operation of SCRs.
b. Describe construction and working of Opto-TRIAC.

Q5. Power Circuits

a. Explain the concept of Freewheeling Diode with proper waveforms.
b. Explain the Single-Phase Bridge Inverter Circuit with load voltage and current waveforms.

Q6. Transducers and Converters

a. Explain construction and working of Thermo-Resistive Transducers.
b. Explain the working of Variable-Frequency Drives with a construction diagram.

Q7. Control and Drives

a. Explain Slip Power Recovery Scheme for speed control of AC drives.
b. Explain Power Factor Control through solid-state devices.