About this course
Dr. A.P.J. Abdul Kalam Technical University (APJAKTU)
Fundamentals Of Mechanical Engineering
Common for all Branch
B.Tech-1st Year
Sem-1&2
The entire syllabus is covered topic-by-topic in the form of question answers.
Comments (0)
Unit-1: Introduction to Mechanics
33 Parts
- 2:45 Hr
Que 1.1. Define moment of forces. Also give its applications.
AKTU
5 Min
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Que 1.2. Write a short note on: Couple.
AKTU
5 Min
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Que 1.3. Define the principle of transmissibility of forces
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5 Min
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Que 1.4. State and prove Varignon's theorem.
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5 Min
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Que 1.5. Calculate the moment of 90 N force about point O for the condition θ= 15°. Also, determine the value of θ for which the moment about O is zero.
AKTU
5 Min
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Ques.1.6. What do you understand by like parallel forces and unlike parallel forces ?
AKTU
5 Min
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Ques.1.7. Give the classification of system of forces and also explain the systems involved.
Important
5 Min
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Ques.1.8. Describe the component of forces in space and also give the formula for resultant.
AKTU
5 Min
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Que 1.9. Derive an expression for the resultant of collinear coplanar forces.
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5 Min
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Ques.1.10. Three collinear horizontal forces of magnitude 200 N, 100 N and 300 N are acting on a rigid body. Determine the resultant of the forces analytically when i. All the forces are acting in the same direction.
ii. The force 100 N acts in the opposite direction.
5 Min
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Que 1.11. Derive an expression for the resultant of concurrent coplanar forces when two or more than two forces act on a point.
AKTU
5 Min
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Que 1.12. Discuss resultant of non-concurrent coplanar forces in detail.
AKTU
5 Min
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Que 1.13. Discuss in short about the various types of supports.
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5 Min
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Que 1.14. What are the different types of loading ? Explain.
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5 Min
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Ques.1.15. Explain free body diagram with example.
AKTU
5 Min
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Ques.1.16. What are the steps in making of a free body diagram?
AKTU
5 Min
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Ques. 1.17. Write in short about principle of equilibrium.
AKTU
5 Min
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Que 1.18. Write down the equations of equilibrium for coplanar non-concurrent force system and coplanar concurrent force system.
AKTU
5 Min
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Que 1.19. Determine the reaction at support A and D in the structure shown in Fig. 1.19.1.
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5 Min
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Que 1.20. Calculate the support reactions in the given cantilever beam as shown in Fig. 1.20.1.
AKTU
5 Min
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Ques.1.21. Define stress and also classify it.
AKTU
5 Min
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Ques.1.22. Define strain. What are different types of strain ?
Important
5 Min
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Ques.1.23. Write short notes on: i. Hooke's law, ii. Longitudinal strain, iii. Lateral strain, and iv. Poisson's ratio.
Important
5 Min
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Que 1.24. Explain the various types of elastic constants.
AKTU
5 Min
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Que 1.25. Draw and explain the stress-strain diagram for mild steel under tensile load.
AKTU
5 Min
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Ques.1.26. Define brittle material. Explain the stress strain diagram for brittle material.
AKTU
5 Min
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Ques.1.27. What do you mean by Factor of Safety (FOS) ?
AKTU
5 Min
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Ques.1.28. Derive the following expression for the elastic constant, K=E/3(1-2µ ).
AKTU
5 Min
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Ques.1.29. Determine the Poisson's ratio and bulk modulus of a material, for which Young's modulus is 120 GPa and modulus of rigidity 48GPa.
AKTU
5 Min
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Ques.1.30. Develop the relationship between E (Young's modulus), C (Shear modulus), K (Bulk modulus) and u (Poisson ratio).
AKTU 2021-22, Marks 10
5 Min
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Ques.1.31. Establish the relation between modulus of elasticity (E) and shear modulus (G).
AKTU
5 Min
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Unit-2: Introduction to IC Engines and Electric Vehicles
30 Parts
- 2:30 Hr
Quws.2.1. What is Internal Combustion (IC) engine ? Classify IC engine.
AKTU
5 Min
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Que.2.2. Describe the basic parts terminologies used in internal combustion engine with neat sketch.
AKTU
5 Min
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Ques.2.3. List out the main parts of internal combustion engine and explain with neat sketches any two important parts.
AKTU
5 Min
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Que 2.4. With a neat sketch explain the working of a two stroke SI engine.
AKTU 2020-21 (Sem-1), Marks 10
5 Min
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Ques.2.5. Explain the working of four stroke petrol engine with diagram.
AKTU 2021-22, Marks 10
5 Min
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Que 2.6. With a neat sketch explain the working of a four stroke CI engine.
AKTU 2020-21 (Sem-1), Marks 10
OR
Explain the working of four stroke CI engine with P-V diagram and
with suitable sketch.
AKTU 2021-22 (Sem-2), Marks 10
5 Min
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Ques.2.7. Give the merits and demerits of 4 stroke engine.
Important
5 Min
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Que 2.8. Give the merits and demerits of 2 stroke engine.
AKTU
5 Min
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Que 2.9. What is scavenging process ?
AKTU
5 Min
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Que 2.10. What is the effect of inadequate scavenging in a two stroke engine ?
AKTU
5 Min
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Que 2.11. What are the different stages of scavenging process?
AKTU
5 Min
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Que 2.12. Differentiate between four stroke and two stroke engines.
OR
Compare the following: 4-stroke engine and 2-stroke engine.
AKTU 2021-22(Sem-1), Marks 05
5 Min
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Que 2.13. Compare the SI Engine and CI Engine.
AKTU 2021-22, Marks 05
5 Min
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Que 2.14. Explain in brief about electric vehicles.
AKTU
5 Min
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Ques.2.15. What are the various types/categories of electric vehicle?
AKTU
5 Min
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Que 2.16. Discuss the basic EV components.
AKTU
5 Min
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Que 2.17. What are EV batteries ?
AKTU
5 Min
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Que 2.18. Explain the working of lithium-based batteries.
AKTU
5 Min
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Que 2.19. Mention the advantages and disadvantages of lithium- ion batteries.
AKTU
5 Min
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Que 2.20. Write a short note on : EV chargers.
AKTU
5 Min
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Que 2.21. Discuss on-board charger (OBC) for EV batteries.
AKTU
5 Min
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Que 2.22. Discuss off-board charger for EV batteries.
AKTU
5 Min
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Que 2.23. Explain the drive system of electric vehicle.
AKTU
5 Min
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Que 2.24. Give the overview of single speed transmission system for the electric vehicle. Also mention its advantages and disadvantages.
Important
5 Min
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Que 2.25. Give the overview of two speed transmission system for the electric vehicle. Also mention its advantages and disadvantages.
AKTU
5 Min
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Que 2.26. What are power devices used in an electric vehicle ?
AKTU
5 Min
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Que 2.27. Mention advantages and disadvantages of electric vehicles.
AKTU
5 Min
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Que 2.28. Write a short note on : Hybrid Electric Vehicles (HEVs).
AKTU
5 Min
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Que 2.29. What are various HEV drive train components ?
AKTU
5 Min
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Que 2.30. What are the various advantages and disadvantages of hybrid vehicles ?
AKTU
5 Min
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Unit-3: Introduction to Refrigeration and Air-Conditioning
15 Parts
- 1:15 Hr
Que 3.1. What do you mean by refrigeration ? Also write applications of refrigeration.
AKTU
5 Min
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Que 3.2. Define the following terms : i. Refrigerating effect, ii. Unit of refrigeration, iii. Coefficient of performance (COP), and iv. Ton of refrigeration.
Important
5 Min
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Que 3.3. What are the different methods of producing refrigeration ?
AKTU
5 Min
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Que 3.4. Explain the construction and working of domestic refrigerator with neat sketch.
OR
Explain the working of a domestic refrigerator with a neat sketch.
AKTU 2020-21 (Sem-1), Marks 10
OR
What do you mean by refrigeration ? Explain basic components and working of domestic refrigerator with suitable sketch.
AKTU 2021-22 (Sem-2), Marks 10
5 Min
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Que 3.5. Explain the working of vapour compression refrigeration system by T-S diagram with related block diagram.
AKTU 2021-22, (Sem-1), Marks 10
5 Min
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Ques.3.6. What do you mean by heat reservoir ?
AKTU
5 Min
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Que 3.7. Write short note on the following : i. Heat pump, ii. Refrigerator.
AKTU
5 Min
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Que 3.8. What do you understand by air conditioning? Describe three major ways of classifying air conditioning systems.
AKTU
5 Min
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Que 3.9. What are the basic components used in an air conditioning system ?
AKTU
5 Min
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Ques.3.10. What are the applications of air conditioning in industry?
AKTU
5 Min
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Ques.3.11. What do you mean by psychrometry? Briefly describe the terms related with psychrometry.
Important
5 Min
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Que3.12. Discuss in brief about thermal analysis of human body.
AKTU
5 Min
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Que 3.13. Explain the factors which affect human comfort. What is the use of comfort chart for comfort air conditioning ?
AKTU
5 Min
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Que 3.14. Differentiate between the comfort and industrial air conditioning.
AKTU
5 Min
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Que 3.15. Draw a labelled sketch and explain working of window air conditioning system.
OR
Explain the construction and working of window air condition.
AKTU 2020-21 (Sem-1), Marks 10
OR
Explain basic components and working of window air conditioner.
AKTU 2021-22 (Sem-2), Marks 10
5 Min
Attachments:
Unit-4: Introduction to Fluid Mechanics and Applications
21 Parts
- 1:45 Hr
Que 4.1. Discuss some physical properties of fluids in brief.
AKTU
5 Min
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Que4.2. State Newton's law of viscosity and derive the same. What are its applications ?
AKTU
5 Min
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Que 4.3. What is the difference between dynamic viscosity and kinematic viscosity ?
AKTU
5 Min
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Que 4.4. Explain the following : i. Compressibility, ii. Surface tension, and iii. Incompressible flow.
AKTU
5 Min
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Que 4.5. Determine the bulk modulus of elasticity and compressibility of a liquid. If the pressure of liquid is increased from 70 N/cm2 to 130 N/cm2. The volume of liquid decreases by 0.15%.
AKTU
5 Min
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Que 4.6. What should be the diameter of a droplet of water, if the pressure inside is to be 0.0018 kg(f)/cm2 greater than the outside ? Given the value of surface tension of water in contact with air at 20 degree Cent. as 0.0075 kg(f)/m.
AKTU
5 Min
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Que 4.7. Define the following terms : i. Absolute pressure, ii. Atmospheric pressure, iii. Gauge pressure, and iv. Vacuum pressure.
Important
5 Min
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Que 4.8. What are the types of fluid ?
AKTU
5 Min
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Ques.4.9. State Pascal's law and give examples where it is applied.
AKTU 2020-21, Marks 10
OR
State and prove the Pascal's law.
5 Min
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Que 4.10. Derive the continuity equation for fluid flow through a pipe.
AKTU
5 Min
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Que4.11. What are hydraulic turbines ? Classify hydraulic turbines with examples in detail.
OR
What are hydraulic turbines ? How are they classified ? Write their advantages and disadvantages.
AKTU 2020-21, Marks 10
5 Min
Attachments:
Que 4.12. Explain construction and working of Pelton wheel turbine.
OR
What is Turbine ? Explain construction details of Pelton Turbine
with diagram.
AKTU 2021-22 (Sem-1), Marks 10
5 Min
Attachments:
Que 4.13. What is Francis Turbine ? Describe briefly the function of various components of Francis turbine (radial flow reaction turbine) with neat sketch.
AKTU
5 Min
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Que 4.14. With the help of neat sketch explain the working of Francis turbine.
AKTU
5 Min
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Que 4.15. Show that the work done per second per unit weight of water in reaction (Francis) turbine is given as 1/g (Vw1u1).
Where,
Vw1 = Velocity of whirl at inlet, and
u1 =Tangential velocity of wheel at inlet.
5 Min
Attachments:
Ques.4.16. Explain governing mechanism of Francis turbine.
AKTU
5 Min
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Que 4.17. What are hydraulic pumps ? Enlist the various types of pumps.
AKTU: (Sem-1), Marks 10
OR
Give classification of pumps. What do you mean by centrifugal and
reciprocating pump ?
5 Min
Attachments:
Que 4.18. With a neat sketch illustrate the construction and working of Centrifugal Pump.
AKTU 2021-22 (Sem-2), Marks 10
OR
Give the constructional details of a centrifugal pump. Also explain its working.
5 Min
Attachments:
Que .4.19. Explain the working and construction details of reciprocating pump.
AKTU 2021-22 (Sem-1), Marks 10
5 Min
Attachments:
Que 4.20. Explain the working of Hydraulic Lift with the help of a neat diagram.
AKTU
5 Min
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Que 4.21. Draw neat sketch and explain suspended hydraulic lift.
AKTU
5 Min
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Unit-5: Introduction to Measurement and Mechatronics
56 Parts
- 4:40 Hr
Que 5.1. What is measurement ? Write down the scope and requirement of measurement.
AKTU
5 Min
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Que.5.2. Explain various methods of measurement.
AKTU
5 Min
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Que 5.3. Draw a block diagram representation of a generalized measurement system. Identify various elements and explain their functions.
AKTU
5 Min
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Que 5.4. What is error ? Also explain sources of error.
AKTU
5 Min
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Que 5.5. Explain the various errors in measurement and the practices which are needed to minimize them.
AKTU 2020-21 (Sem-1), Marks 10
OR
Explain classification of measurement errors.
5 Min
Attachments:
Que 5.6. Define error in measurement. Discuss different types of errors in measurement in detail.
AKTU 2021-22 (Sem-2), Marks 10
5 Min
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Que 5.7. Write short notes on calibration and static calibration.
AKTU
5 Min
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Que 5.8. Define pressure and give the classification of pressure measurement devices.
AKTU
5 Min
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Que 5.9. Define pressure. Write the classification of pressure measurement instruments. Explain the working of bourdon tube pressure gauge with neat sketch.
AKTU 2021-22 (Sem-1), Marks 10
OR
Define Pressure. Explain the construction and working of Bourdon Tube pressure gauge.
AKTU 2021-22 (Sem-2), Marks 10
5 Min
Attachments:
Que 5.10. What do you understand by manometers Also write down the types of manometers. Explain any one.
AKTU
5 Min
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Que 5.11. What is the principle of temperature measurement ?
AKTU
5 Min
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Que 5.12. Describe the thermocouples with neat sketch.
AKTU
5 Min
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Que5.13. Briefly explain temperature measuring device based on the principle of radiation with neat sketch.
AKTU 2021-22 (Sem-2), Marks 10
OR
Explain briefly the construction and working of a radiation pyrometer.
5 Min
Attachments:
Que 5.14. Explain the construction and working of optical pyrometer.
AKTU 2021-22 (Sem-1), Marks 10
OR
Describe an optical pyrometer and explain its working.
5 Min
Attachments:
Que 5.15. Write assumption of Bernoulli equation. Also state Bernoulli theorem.
AKTU
5 Min
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Ques.5.16. What are the parts of venturimeter ? Derive a formula to measure the rate of flow of a liquid through venturimeter. Q={a1a2/(√a1^2-a1^2)}√2gh
AKTU 2021-22 (Sem-1), Marks 10
OR
Define venturimeter. Also derive the expression for the same.
5 Min
Attachments:
Ques.5.17. What is orifice meter ? Derive the formula of orifice meter.
AKTU
5 Min
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Que 5.18. What is strain gauge ? Give various types of strain gauge.
OR
Explain briefly, the mechanical strain gauge.
5 Min
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Que.5.19. Write a short note on: Bonded Strain Gauge.
AKTU
5 Min
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Que 5.20. Write a short note on: Unbonded Strain Gauge.
AKTU
5 Min
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Que 5.21. What are the strain gauge circuits ?Discuss Wheatstone bridge circuit as static strain measurement.
AKTU
5 Min
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Que 5.22. What is proving ring ? Explain its construction and working.
AKTU
5 Min
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Que 5.23. Explain in detail prony brake dynamometer for torque measurement with neat sketch.
AKTU
5 Min
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Que 5.24. Define accuracy, precision and resolution.
AKTU
5 Min
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Que 5.25. What is the difference between precision and accuracy?
AKTU
5 Min
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Que 5.26. What do you understand by mechatronics ? Give the evolution level of mechatronics.
AKTU
5 Min
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Que 5.27. Enlist the features/characteristics of mechatronics system.
AKTU
5 Min
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Que 5.28. What are the objectives and scope of mechatronics ?
AKTU
5 Min
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Que 5.29. Mention advantages, disadvantages and applications of mechatronics
AKTU
5 Min
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Que 5.30. Write a short note on use of mechatronics in industries. Give examples of mechatronics systems.
AKTU
5 Min
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Que 5.31. Discuss the various key elements of a mechatronics system and write any four-mechatronics system.
AKTU 2021-22, Marks 10
5 Min
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Que 5.32. Explain the term autotronics. Give the application of autotronics in automobiles.
AKTU
5 Min
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Que 5.33. What do you mean by bionics? Explain bionics, with an example.
AKTU
5 Min
Attachments:
Que 5.34. Define avionics. Give the major applications of avionics.
AKTU
5 Min
Attachments:
Que 5.35. Define sensors. Discuss various types of sensors along with their applications, advantages and limitations.
Important
5 Min
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Que 5.36. What is Sensor ? Explain classification of sensors based on various Inputs and Outputs.
AKTU 2021-22 (Sem-1), Marks 10
5 Min
Attachments:
Que 5.37. Discuss in brief, the static performance characteristics of a sensor.
AKTU
5 Min
Attachments:
Ques.5.38. Give definition of a transducer. What are the characteristics of transducer? '
Important
5 Min
Attachments:
Que 5.39. Classify transducers.
AKTU
5 Min
Attachments:
Que 5.40. What is an actuator ?Classify actuator.
OR
Explain different types of "Mechanical Actuation System" based on
power inputs.
AKTU 2021-22 (Sem-1), Marks 10
5 Min
Attachments:
Que 5.41. What do you mean the chain and chain drive ?
AKTU
5 Min
Attachments:
Que 5.42. Define cam. Explain its different types.
Important
5 Min
Attachments:
Que 5.43. Write short note on ratchet and pawl mechanism.
AKTU
5 Min
Attachments:
Que 5.44. Give a brief classification of toothed wheels or gears.
AKTU
5 Min
Attachments:
Que 545. Discuss in brief about gear transmission. Also write down advantages and disadvantages of gear drive.
AKTU
5 Min
Attachments:
Que.5.46. Define belt ?What are the different types of belts and drives ?
Important
5 Min
Attachments:
Que 5.47. Define the term bearing and write down its functions.
AKTU
5 Min
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Que 5.48. Give the classification of bearing.
AKTU
5 Min
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Que 5.49. Discuss about hydraulic actuation system.
AKTU
5 Min
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Que.5.50. What are the functions of pressure control valve? Also classify it on the basis of their primary function.
AKTU
5 Min
Attachments:
Ques.5.51. What is fluid power hydraulic cylinder ? Also mention various type of cylinder.
AKTU
5 Min
Attachments:
Que 5.52. Define direction control valves also classify it.
OR
Explain directional control valve and its significance with neat sketch.
AKTU 2021-22 (Sem-2), Marks 10
5 Min
Attachments:
Que 5.53. Discuss pneumatic actuation system with their advantages and disadvantages.
AKTU
5 Min
Attachments:
Que 5.54. Write short note on rotary actuators.
AKTU
5 Min
Attachments:
Que 5.55. Write short note on accumulators.
AKTU
5 Min
Attachments:
Que 5.56. Discuss in brief about pneumatic cylinder sequencing.
AKTU
5 Min
Attachments:
Short Questions(Unit-1 to Unit-5)
44 Parts
- 3:40 Hr
Q.1. Define moment of forces, Couple, Varigon's Theorem.
AKTU
5 Min
Attachments:
Q.2. Give the names of various types of supports
AKTU
5 Min
Attachments:
Q.3. Define point load, UDL and UVL.
Important
5 Min
Attachments:
Q.4. What is free body diagram ? State principle of equilibrium.
AKTU
5 Min
Attachments:
Q.5. Define Hooke's law and Poisson's ratio.
AKTU 2020-21 (Sem-1), Marks 02
AKTU 2021-22(Sem-1), Marks 02
5 Min
Attachments:
Q.6. Explain the following terms : i. Young's modulus. ii. Modulus of rigidity iii. Bulk modulus of elasticity iv. elastic limit.
Important
5 Min
Attachments:
Q.6. What are internal combustion engines ?
AKTU 2020-21, Marks 02
5 Min
Attachments:
Q.8. What do you mean by displacement volume or piston swept volume ?
AKTU
5 Min
Attachments:
Q.9. What is a two stroke engine ? What is a four stroke engine ?
AKTU
5 Min
Attachments:
Q.10. What is scavenging process ? Name the different stages of scavenging process.
AKTU 2020-21, 2021-22,Marks 02
5 Min
Attachments:
Q.11. Compare SI and CI engine with respect to compression ratio and ignition.
AKTU
5 Min
Attachments:
Q.12. Define electric vehicle. What are the various types/categories of electric vehicle ?
AKTU
5 Min
Attachments:
Q.13. What are EV batteries and EV chargers?
Important
5 Min
Attachments:
Q.14. What are power devices used in an electric vehicle? Mention advantages and disadvantages of electric vehicles.
AKTU
5 Min
Attachments:
Q.15. Define refrigeration. What is the purpose of refrigeration ?
AKTU
5 Min
Attachments:
Q.16. What do you mean by refrigeration effect and unit of refrigeration ? What are the different methods of producing refrigeration ?
AKTU
5 Min
Attachments:
Q.17. What do you mean by heat reservoir and y heat pump ?
AKTU
5 Min
Attachments:
Q.18. Explain COP of refrigerator.
AKTU 2020-21 (Sem-1), Marks 02
5 Min
Attachments:
Q.19. List the components of a vapor compression refrigeration system and show them in sequence on a block diagram.
AKTU 2021-22 (Sem-2), Marks 02
5 Min
Attachments:
Q.20. Differentiate between refrigerator and heat pump.
Important
5 Min
Attachments:
Q.21. Define energy performance ratio (EPR) , AC, Dry Air.
AKTU
5 Min
Attachments:
Q.22. Define Dry and wet bulb temperature, Dew point temperature.
AKTU
5 Min
Attachments:
Q.23. Define the term fluid and specific gravity of fluid.
AKTU 2021,22 (Sem-2), Marks 02
5 Min
Attachments:
Q.24. Write any four properties of fluid.
AKTU 2021-22 (Sem-1), Marks 02
5 Min
Attachments:
Q.25. Define viscosity. State Newton's law of viscosity.
Important
5 Min
Attachments:
Q.26. What is the difference between dynamic viscosity and kinematic viscosity ?
AKTU
5 Min
Attachments:
Q.27. Differentiate between gauge pressure and absolute pressure.
AKTU 2021-22 (Sem-2), Marks 02
5 Min
Attachments:
Q.28. What are Newtonian and non-Newtonian fluids ?
AKTU 2020-21 (Sem-1), Marks 02
5 Min
Attachments:
Q.29. Discuss the equation of continuity.
AKTU 2021-22 (Sem-1), Marks 02
5 Min
Attachments:
Q.30. Define i. Hydraulic Turbines ii. Francis Turbines iii. Hydraulic Pumps iv. centrifugal pumps v. Reciprocating pump.
Very Important
5 Min
Attachments:
Q.31. What do you mean by hydraulic lift ?
AKTU
5 Min
Attachments:
Q.32. What is measurement ? Define error of measurement.
AKTU
5 Min
Attachments:
Q.33. Explain the calibration in measurement.
AKTU 2021-22 (Sem-2), Marks 02
5 Min
Attachments:
Q.34. What do you understand by manometers, thermocouple, venturimeter?
Important
5 Min
Attachments:
Q.35. What is orifice meter ? What is proving ring ?
AKTU
5 Min
Attachments:
Q.36. Differentiate between accuracy and precision.
AKTU 2020-21, 2021-22, (Sem-1), Marks 02
5 Min
Attachments:
Q.37. Define mechatronics and its key elements.
AKTU 2021-22 (Sem-2), Marks 02
5 Min
Attachments:
Q.38. Describe the range and span of a measuring instrument.
AKTU 2021-22 (Sem-2), Marks 02
5 Min
Attachments:
Q.39. Define transducer. Differentiate active and passive transducers.
AKTU 2021-22 (Sem-1), Marks 02
5 Min
Attachments:
Q.40. What is an actuator ? Write any four mechanical actuators.
AKTU 2021-22 (Sem-2), Marks 02
5 Min
Attachments:
Q.41. Explain pressure control valves and directional control valve.
AKTU 2020-21 (Sem-1), Marks 02
5 Min
Attachments:
Q.42. What is an accumulator ? What is the function of an accumulator?
AKTU 2021-22 (Sem-1), Marks 02
5 Min
Attachments:
Q.43. What is hydraulic actuation system ?
AKTU
5 Min
Attachments:
Q.44. Define avionics, sensors, autotronics.
AKTU
5 Min
Attachments:
Solved Papers(2020-21 to 2021-22)
3 Parts
- 0:15 Hr
(SEM. I) ODD SEMESTER THEORY EXAMINATION, 2020-21
Question Paper
5 Min
Attachments:
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