(SEM III) THEORY EXAMINATION 2023-24 ELECTRICAL MEASUREMENTS & INSTRUMENTATION

This document presents the complete Theory Examination Question Paper for Electrical Measurements & Instrumentation (BEE302) for B.Tech, Semester III, Academic Session 2023–24.
The examination is structured to evaluate the student’s understanding of measurement principles, electrical instruments, AC/DC bridges, transducers, transformers, and power measurement techniques.

The paper contains three sections (A, B, and C), with questions designed to assess conceptual clarity, analytical ability, numerical problem-solving, and practical understanding of instrumentation.

Section A – Short Answer Conceptual Questions (14 Marks)

This section includes 7 compulsory questions, each carrying 2 marks, focusing on fundamental concepts like:

Accuracy vs precision

Types of measurement errors

AC bridge balance conditions

CT/PT ratios

Characteristics of transducers

Section B – Descriptive / Analytical Questions (21 Marks)

Students must attempt any 3 out of 5 questions, each carrying 7 marks.
This section evaluates:

Principle and construction of moving-iron instruments

Two-wattmeter method of power measurement

Owen’s bridge for inductance measurement

CT ratio and phase angle error calculations

Construction and application of LVDT

Section C – Long Answer / Application-Based Questions (35 Marks)

Students must attempt one question from each of the five subsections, covering:

PMMC instruments

Wheatstone bridge error calculations

Electrodynamometer wattmeter

Power factor meter

Kelvin double bridge

Crompton DC potentiometer

Wave analyzers

Current transformer equivalent circuit

Strain gauge transducer

Capacitive transducer

This section tests in-depth knowledge, derivations, diagrams, and real-world applications of measurement systems.

Added 3 Extra Questions (As Requested)

You can include these in any section depending on requirement:

1. What are the advantages of digital instruments over analog instruments?

(Section A – 2 Marks)

2. Derive the equation for the sensitivity of a PMMC instrument.

(Section B – 7 Marks)

3. With a neat diagram, explain the working of a Hall-effect transducer.