Your roadmap · आपका रोडमैप
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Admission & first meetingप्रवेश और पहली मुलाकातEnquire at your nearest NDSS centre, meet the teacher, fix the batch time and get your study material.
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Work planकार्य योजनाStep by step with your guide / trainer.
Tension Test on Mild SteelCompression TestHardness TestsImpact TestsTorsion TestDeflection of Beams and Springs
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File, report & vivaफ़ाइल, रिपोर्ट और वाइवाPractical file / report checked, mock viva before the final one.
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Online tests & resultऑनलाइन टेस्ट और रिज़ल्टTake the tests online; your marks and result show in your student login and at the centre.
Syllabus · पाठ्यक्रम
1 subject · 6 chapters · 26 topics
01Tension Test on Mild Steel
6 topics+
- Universal Testing Machine (UTM) parts and working
- Preparing and marking the specimen, gauge length
- Load-extension observations and stress-strain curve
- Limit of proportionality, yield point, ultimate and breaking stress
- Percentage elongation and percentage reduction in area
- Young's modulus from the straight portion of the graph
02Compression Test
4 topics+
- Compression test on cast iron specimen
- Compression test on timber along and across grain
- Crushing strength of bricks / concrete cubes
- Types of failure of brittle and ductile materials in compression
03Hardness Tests
4 topics+
- Brinell hardness test: ball, load and BHN formula
- Rockwell hardness test: B and C scales
- Vickers hardness test (introduction)
- Precautions and surface preparation
04Impact Tests
4 topics+
- Izod impact test: specimen and notch
- Charpy impact test: specimen and notch
- Energy absorbed and impact strength
- Effect of notch and temperature on toughness
05Torsion Test
4 topics+
- Torsion testing machine
- Torque - angle of twist graph
- Modulus of rigidity G = T L / (J theta)
- Shear stress at the surface of a shaft
06Deflection of Beams and Springs
4 topics+
- Deflection of simply supported and cantilever beams
- Verification of Maxwell's reciprocal theorem
- Stiffness of a close-coiled helical spring
- Lab record, graphs and viva
About this course
You will be able to
- Perform the tension test on mild steel on a UTM and find yield stress, ultimate stress, percentage elongation and reduction in area
- Carry out compression tests on cast iron, timber and concrete / brick specimens
- Find Brinell and Rockwell hardness numbers of common metals
- Perform Izod and Charpy impact tests and compare the toughness of materials
- Find the modulus of rigidity of a shaft material by the torsion test
- Record observations neatly, plot graphs and write the lab file and viva answers
Who it is for
- Diploma Mechanical Engineering students of Semester 3 (BTEUP)
- Diploma Civil and Production students taking a materials testing lab
- Students who want to prepare for lab viva and practical exams
What you need
- Theory of Strength of Materials (stress, strain, elastic constants) studied in the same semester
Online tests & result
Practice and unit tests online; marks and result show in your student login and at the centre.
Student login →
Questions
Which experiments are done in this lab?
Tension, compression, hardness (Brinell and Rockwell), impact (Izod and Charpy), torsion, and beam and spring deflection tests.
Will I get help with the lab file and viva?
Yes. Each experiment covers the aim, apparatus, procedure, observation table, calculation, result and common viva questions.
Is this course based on the BTEUP syllabus?
Yes. The units follow the BTEUP (Board of Technical Education, Uttar Pradesh) diploma syllabus. If your polytechnic follows a different board or a revised scheme, the centre teaches your own syllabus.
