(SEM IV) THEORY EXAMINATION 2018-19 ELECTRONIC MEASUREMENTS INSTRUMENTATION

Electronic Measurements & Instrumentation – B.Tech (Semester IV) Theory Examination

This question paper is designed to evaluate students’ understanding of Electronic Measurements, Instrumentation principles, measurement techniques, transducers, bridges, meters, CRO operations, and calibration methods. It carries a total of 70 marks and is divided into three sections—A, B, and C—covering both conceptual and analytical aspects of the subject.
 

SECTION A — Very Short Answer Questions (2 × 7 = 14 Marks)

This section contains seven brief, fundamental questions aimed at testing basic definitions and conceptual clarity.
Topics include:

Random & gross errors                      Analog vs digital multimeters

Quality factor                                      Ammeter current measurement

Interpolation                                       Instrument calibration

Transducers & inverse transducers
 

SECTION B — Descriptive Questions (7 × 3 = 21 Marks)

Students must attempt any three out of five detailed questions.
This section checks understanding of circuit design, working principles, diagrams, and measurement techniques.
Topics include:

Source follower electronic voltmeter                            Multi-range FET voltmeter design

Inductance measurement using bridges                       Frequency & phase measurement using CRO

Piezo-electric transducer modes
 

SECTION C — Long Answer Questions (7 marks each, 5 questions split into choices)

This section consists of five questions, each offering a choice (a or b), requiring deeper explanation, derivations, block diagrams, or calculations.

Main concepts include:

Temperature coefficient–based resistor variation (numerical)             Series ohmmeter construction

Digital frequency meter block diagram                                               Digital multimeter operation

Schering bridge for dielectric loss measurement                                Wheatstone bridge

Delay line in oscilloscope                                                                    Digital Storage Oscilloscope (DSO)

X-Y plotter working                                                                             AC voltmeter calibration
 

Overall Purpose of This Question Paper

The paper tests a student’s ability to:

Understand measurement errors and instrument characteristics

Use electronic instruments correctly

Interpret voltmeter, ammeter, and meter circuits

Apply bridge methods to measure R, L, C

Use CRO and DSO for signal analysis

Understand transducers and their applications

Perform calibration and instrumentation procedures

It combines theory, problem-solving, diagrams, and practical measurement concepts to ensure well-rounded knowledge.