ED7204 Integrated Mechanical Design M.E Question Bank : valliammai.co.in
Name of the College : Valliammai Engineering College
University : Anna University
Department : Mechanical Engineering
Subject Code/Name : ED7204-Integrated Mechanical Design
Degree : M.E CAD/CAM
Year : I
Semester : I
Document Type : Question Bank
Website : valliammai.co.in
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Valliammai Integrated Mechanical Design Question
Fundamentals and design of shafts :
Unit 1
Two Marks :
1. What is role of analysis in design?
Related / Similar Question Paper :
Valliammai College M.E Advanced Numerical Methods Question Bank
2. Define endurance limit.
3. What is impact load?
4. What are the various phases of design process?
5. What are the different types of loads that can act on
6. machine components?
7. What is ISO standard?
8. What are the types of variable stresses?
9. Differentiate between repeated stress and reversed stress.
10. What are the types of fracture?
11. Distinguish between brittle fracture and ductile fracture.
12. Define stress concentration and stress concentration factor.
13. What is tolerance?
14. What are the types of fits?
15. What is clearance fit?
16. What is interference fit?
17. What is transition fit?
18. What is hole basis system?
19. What is shaft basis system?
20. What is BS?
16 Marks :
1. The load on a bolt consists of an axial pull of 10KN together with a transverse shear force of 5 KN. Find the diameter of bolt required by 1) Maximum distortion energy theory. 2) Maximum principal stress theory 3) Maximum strain energy theory (16)
2. The bending stress in a machine part fluctuates between a tensile stress of 280N/mm2 and a compressive stress of 140N/mm2. What should be the minimum ultimate tensile strength of this part to carry this fluctuation indefinitely according to
(i) Goodman’s formula
(ii) Soderberg formula Factor of safety is 1. 75.
Assume that the yield point is never likely to be less than 55% of the Ultimate tensile strength or greater than 93 % of it. (16)
3. Determine the thickness of a 120mm wide uniform plate for safe continuous operation if the plate is to be subjected to a tensile load that has a maximum value of 1000N.
The properties of the plate materials are as follows. Endurance limit stress is 225MPa and yield point stress is 300MPa.The factor of safety based on yield point may be taken as 1.5. (16)
4. A hot rolled bar of steel is subjected to a torsion load varyingfrom-150N-m to 450N-m. Determine the required diameter of the bar using a factor of safety of 1.7.
Properties of the material may be assumed as follow. Ultimate tensile stress = 450MPa Yield stress = 300MPa 16)
5. A transmission of shaft made C45 steel subjected to a fluctuating torque varying from – 100N-m to +500N-m.Also a fluctuating bending moment acts on the shaft which varies from +500N-m to -500Nm.
Let the stress concentration factor be 2. The shaft is machined for a factor of safety.5.Determine the required diameter of the shaft. (16)
6. (a) A piston of a reciprocating compressor has a diameter of 60mm.The maximum pressure on the piston fall is 1.25MN/m2.Assuming the gudgeon pin passing through the small end of the connecting rod can be safely loaded in shear up to 10MN/m2, Calculate the minimum diameter of the gudgeon pin.(8)
(b) Explain with mathematical expressions. Maximum principal stress theory and Von-Mises-Henky theory(8)
7. (a) Determine the diameter of the steel bar, which is a ductile in nature subjected to an axial load of 60KN and torsional moment of1600N-m.Use the factor of safety 2.5.E=200GPa.(8)
(b) Explain with mathematical expressions. Maximum shear theory Venant’s theory and (8)
8. A steel member is subjected to a 3-D stress system and resulting principal stress are 120N/mm2 tension, 80N/mm2and 40N/mm2compression.
If the proportional limit of the material in simple tension is280N/mm2 and its poison’s ratio is O.3.Determine the factor of safety according to (a) Maximum principal stress theory (b) Maximum principal strain theory (c) Maximum shear stress theory.(16)
9. A bolt is subjected to a tensile load of 25KN and a shear load of 10KN.Determine the diameter of the bolt according to
(a) Maximum principal stress theory
(b) Maximum principal strain theory
(c) Maximum shear stress theory. Assume factor of safety 2.5, Yield point stress in simple tension300N/mm2, Poisson’s ratio is 0.25.(16)
10. Taking stress concentration in to account find the maximum stress induced when a tensile load of 20KN is applied to
(i) Rectangular plate80mm wide and 12mm thick with a transverse hole of 16mm diameter
(ii)Stepped shaft of diameters 60mm and 30mm width a fillet radius of6mm.(16)
Unit 2
Design of Gears and Gear boxes :
Two marks :
1. state the merits and demerits of helical gears.
2. State any two methods of designing a helical gears.
3. State the types of helical gear .
4. Why the crossed helical gear drive not used for power transmission?
5. Mention few gear material.
6. What is a herring bone gear? Where is it used?
7. What is the advantage of helical gear over spur gear?
8. What is backlash in gears?
9. When are bevel gears preferred?
10. What is herring bone gear? Where is it used?
11. what are the generally used gear profiles?
12. Specify the significance of minimum number of teeth in pinion.
13. How does failure by pitting happen in gears?
14. Mention the merits of non metallic gears?
15. What is the effect of increasing the pressure angle in gears?
16. When do we employ crossed helical gear?
17. Mention two characteristics of hypoid gear?
18. Compare the contact between mating teeth of spur and helical gears.
19. Define factor of safety for bending and pitting.
20. What is a herring bone gear? Where is it used?
Unit 3
Brakes and Clutches :
Two marks :
1. Classify the types of brakes
2. What is shoe brake?
3. What is drum brake?
4. What is coefficient of friction?
5. What is braking torque?
6. What is angle of contact?
7.What is self-locking?
8.What is double shoe brake?
9.What is band brake?
10. Differentiate a brake and a dynamo meter.
11. Differentiate a brake and a clutch.
12.What is the function of a clutch?
13.Name a few commonly used friction materials.
14. Differentiate a dry and wet operations of a clutch.
15.What is service factor?
16. Differentiate cone and centrifugal clutch.
17. Differentiate disc and cone clutch.
18.What are the materials used for internal expansion in clutches?
19.What is semi cone angle?
20. What is block brake?
I need to know whether it is 2013 or 2008 regulation.