Diploma Strength of Materials N Scheme important questions Unit – 1

Diploma Strength of Materials N Scheme important questions

Subject : Strength of Materials 

UNIT – 1, Engineering Materials              Scheme : N

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NOTE :

1. The highlighted Questions are asked more than two times in the Board Exam – M Scheme, We Matched the syllabus of M Scheme & N Scheme and Removed M Scheme Questions

2. These Questions are collected from Board Examination Question Papers.

3. The student may practice these questions

Unit 1 Syllabus ,ENGINEERING MATERIALS
Chapter: 1.1: Engineering materials:

Classification – definition of Mechanical properties – ferrous metals – cast iron – uses – advantages – types of cast iron – properties and applications – effect of impurities on cast iron. steel – classification – alloying elements – purpose of alloying – effect of alloying elements on steel – uses of steels – properties of mild steel – defects in steel – applications – properties of hard steel – market forms of steels – nonferrous metals – properties and uses.
Chapter: 1.2: Mechanical testing of materials:
Compression test – bend test – hardness test – Brinell hardness test, Vickers hardness test, Rockwell hardness test – impact test – fatigue test – creep test. Tensile test of mild steel in UTM – stress strain diagram -limit of proportionality – elastic limit – yield stress – breaking stress – ultimate stress – percentage of an elongation and percentage reduction in area – problems.
Chapter: 1.3: Friction
Introduction – definition – force of friction – limiting friction – static friction – dynamic friction – angle of friction – coefficient of friction – laws of static and dynamic friction. Description only.

Diploma Strength of Materials N Scheme important questions

3 marks Questions

  1. Define angle of friction.
  2. Explain cone of friction.
  3. Differentiate between static friction & dynamic friction.
  4. Distinguish between force of friction and limiting force of friction.
  5. Define co-efficient of friction.
  6. Define temperature creep.
  7. Distinguish between linear strain and lateral strain
  8. Define proof resilience and modulus of resilience.
  9. Define fatigue strength
  10. What is meant by elastic limit,
  11. Distinguish between factor of safety and load factor.
  12. Define bulk modulus.
  13. Define creep.
  14. Define hardness and list its characteristics..
  15. Differentiate between repeated loading and cyclic loading.
  16. Define factor of safety.
  17. Define  limit of proportionality

Diploma Strength of materials N Scheme important questions, Diploma N scheme Strength of materials Important Questions, N Scheme Strength of materials important question, Diploma N scheme Mechanical important questions

7 / 14 marks questions

  1. A steel bar of 25mm diameter and a length of 1m is subjected to a pull of 25kN. If E=2×10^5 N/mm^2, find the elongation, decrease in diameter and increase in the volume of the bar. Take m=4
  2. Explain the stress – strain diagram for a mild steel specimen with its salient point parameters.
  3. List out the various alloying elements used in steel and explain their major effects.
  4. List and explain the various mechanical properties of materials..
  5. State the laws of dynamic friction.
  6. State the laws of static friction.

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