Important questions
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1. Mechanical testing
2. Material attributes
3. Direct and indirect method
Unit-2
1. LPT
2. Testing procedure
3. Inspection and evolution
Unit-3
1. Eddy current test
2. Thermography
3. Electro magnatic spectrum
Unit-4
1. Ultrasonic testing
2. Types of scanning
3. Acoustic emission
Unit-5
1. X-ray
2. Flim radiography and digital radiography
3. Invers square law
**Very important questions are bolded and may be asked based on this topic
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*These questions are expected for the exams This may or may not be asked for exams All the best.... from admin Santhosh
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SYllabuS
UNIT 1
INTRODUCTION TO NDT & VISUAL TESTING
Concepts of Non-destructive testing-relative merits and limitations-NDT Versus mechanical testing. Fundamentals of Visual Testing vision, lighting, material attributes, environmental factors, visual perception, direct and indirect methods mirrors, magnifiers, boroscopes and fibroscopes - light sources and special lighting.
UNIT II
LIQUID PENETRANT & MAGNETIC PARTICLE TESTING
Liquid Penetrant Inspection: principle, applications, advantages and limitations, dyes, developers and cleaners, Methods & Interpretation.
Magnetic Particle Inspection: Principles, applications, magnetization methods, magnetic particles, Testing Procedure, demagnetization, advantages and limitations, Interpretation and evaluation of test indications.
UNIT III
EDDY CURRENT TESTING & THERMOGRAPHY
Eddy Current Testing: Generation of eddy currents- properties- eddy current sensing elements, probes, Instrumentation, Types of arrangement, applications, advantages, limitations - Factors affecting sensing elements and coil impedance, calibration, Interpretation/Evaluation. Thermography- Principle, Contact & Non-Contact inspection methods, Active & Passive methods, Liquid Crystal - Concept, example, advantages & limitations. Electromagnetic spectrum, infrared thermography- approaches, IR detectors, Instrumentation and methods, applications.
UNIT IV
ULTRASONIC TESTING & AET
Ultrasonic Testing: Types of ultrasonic waves, characteristics, attenuation, couplants, probes, EMAT. Inspection methods-pulse echo, transmission and phased array techniques, types of scanning and displays, angle beam inspection of welds, time of flight diffraction (TOFD) technique, Thickness determination by ultrasonic method, Study of A, B and C scan presentations, calibration. Acoustic Emission Technique Introduction, Types of AE signal, AE wave propagation, Source location, Kaiser effect, AE transducers, Principle, AE parameters, AE instrumentation, Advantages & Limitations, Interpretation of Results, Applications.
UNIT V
RADIOGRAPHY TESTING
Sources-X-rays and Gamma rays and their characteristics-absorption, scattering. Filters and screens, Imaging modalities-film radiography and digital radiography (Computed, Direct, Real Time, CT scan). Problems in shadow formation, exposure factors, inverse square law, exposure charts, Penetrameters, safety in radiography.