Q2. Define Numerical Control. What are the different components of an N/ C system? Q6. List the advantages of CNC. How CNC is different from NC?

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1 Assignment-I CNC Machines & Automation (Up to Mid-Semester Exam) Q1. How an N / C machine tool is different from a conventional machine tool. Q2. Define Numerical Control. What are the different components of an N/ C system? Q3. What is direct numerical control? How it is different from computerized Numerical Control (CNC). Q4. Differentiate between NC, DNC and CNC. Q5. Mention some characteristics that are desirable for a component to be machined on a CNC system. Q6. List the advantages of CNC. How CNC is different from NC? Q7. How the conventional machine tools and CNC machine tool is different in design and construction. Q8. What are the advantages of recirculating ball screw over the conventional lead screws? Q9. Explain the different types of spindle and feed drives used in CNC machines. Q10. What do you understand by PLC? Explain its advantages and disadvantages. Q11. What are the applications and limitations of PLC machine? Q12. Explain the different types of slide ways. Q13. What are the various characteristic of cutting tools materials of CNC machine? Q14. What are different types of cutting tool material? Explain each one of them in detail. Q15. What are the advantages of using indexible inserts in CNC machines? Q16. What are different types of tool magazines used in CNC machine tools? Discuss their advantages and disadvantages also. Q17. What do you understand by PLC? Explain its advantages and disadvantages. Q18. Explain the different work holding devices used in CNC machining. Q19. How NC / CNC systems are classified? Discuss in detail. Q20. How a closed loop control system is more advantageous as compared to an open-loop control system?.x.

2 Assignment-I Computer Integrated Manufacturing (Up to Mid-Semester Exam) Q1. Explain the product cycle of conventional manufacturing environment. Q2. Explain the following. (a) (b) Mass production Batch production Q3. Where does CAM Find applicability Q4. What are the advantages of using CAM? Q5. Show the common data bases for manufacturing applications. Q6. What does the term computer Aided Manufacturing mean? Q7. What are the major components of CAD / CAM? Q8. What is the basic configuration of a typical computer system? Q9. What is the importance of a CPU in a computing system? Q10. Describe the various types of semiconductor memory devices used in microcomputers. Q11. Specify a digitizer for the CAD application and justify your choice. Q12. What do you understand by a raster scanning? Why is it preferred to the storage tube in the display of graphics information? Q13. What type of printers would be useful for printing graphic information? Q14. How would you classify software? Q15. What is meant by numerical control of machine tools? Q16. How does Numerical control increase the precision of a machine tool? Q17. Explain the function of MCU in an NC tooling and Conventional tooling. Q18. Explain the principles of designating the axes of NC machines. Q19. Explain the steps of automatic tool changing in an NC machining Centre. Q20. What is meant by interpolation? How is it implemented on an NC machine tool?

3 Assignment-I Industrial Engineering (Up to Mid-Semester Exam) Q1. Explain the concept and factors of production system. Q2. What is Analysis of production system? Q3. What are the goals & objectives required to take the decision in a plant or industry. Q4. Explain the Concept of Productivity. Q5. How would you increase productivity of resources? Q6. What are the various kinds of productivity measures? Q7. What were the sources of information for developing measures of productivity? Q8. What were the Advantages of selecting a rural site as compared to urban site? Q9. What are the various objectives of good plant layout? Q10. Explain the disadvantages of process layout as compared to product layout. Q11. Explain fixed position layout. Q12. Describe the various methods of plant and factory layouts. Q13. What are the various considerations to be taken while designing a factory building? Q14. What are the various advantages & disadvantages of Multi Storey Buildings? Q15. Explain the need for work study. Q16. Describe process charts symbols. Q17. Explain flow diagram & string diagram. Q18. Explain design considerations for work place layout. Q19. What are therbligs? Q20. Explain stop watch procedure for collecting time study data.

4 Assignment-I Refrigeration & Air Conditioning (Up to Mid-Semester Exam) Q1. Give some applications of refrigeration. Q2. What are the methods of refrigeration? Give a brief description of each method. Q3. What do you mean by a ton of refrigeration? Q4. Explain the term Co-efficient of Performance. Q5. Explain the difference between refrigerating capacity and ice making capacity of a refrigerating machine. Q6. Explain the working of a vapour compression system by drawing a flow diagram. Q7. How does an actual vapour compression cycle differ from theoretical cycle? Q8. What is the effect of sub-cooling and superheating the refrigerant in a vapour compression system? Q9. Give a comparison between an expansion cylinder and a throttle valve. Q10. Give the advantages of a vapour compression system over air refrigeration system. Q11. Name the various refrigerant absorbent combinations used in vapour absorption refrigeration system. Q12. What is the working principle of a vapour absorption system? Q13. What improvements are necessary in a simple absorption system so as to make it more practical? Q14. Draw a neat line diagram of an Electrolux refrigerator and explain its working principle. Q15. Give a comparison of vapour absorption system with a vapour compression system. Q16. Define a refrigerant and classify the refrigerants. Name the various refrigerants commonly used. Q17. Enumerate the desirable properties of a good refrigerant. Q18. (a) Explain why refrigerant from Freon group are increasingly used for small and big plants. (b) Compare the various properties of NH 3, R-11, R-12 AND R-22. Q19. Name various methods which are commonly used for leak detection of various refrigerants. Describe each briefly. Q20. Describe the factors which are considered while selecting a refrigerant for a particular system. x

5 Assignment-I Theory of Machines (Up to Mid-Semester Exam) Q1. What is meant by lower kinematic pair, higher kinematic pair and a kinematic chain? Q2. Explain double slider crank chain mechanism and tits inversion with neat sketch. Q3. Classify the kinematic pairs according to the relative motion between the elements. Q4. What is a mechanism? What are its different types? Explain. Q5. Derive an expression for the fluctuation of energy. Q6. Explain coefficient of fluctuation of speed and energy. Q7. A horizontal 200 KW compound steam engine runs at 100 r.p.m. The speed of the engine is maintained by 1% on either side of the mean speed. The flywheel possesses a mass of 2000 kg and radius of gyration of flywheel is 1 m. Calculate the coefficient of fluctuation of energy. Q8. A flywheel having a mass of 6.5 tonnes has a radius of gyration of 1.8 meter. What amount of energy this flywheel will store in changing its speed from 119 r.p.m. to 121 r.p.m.? Q9. Describe a simple watt governor and point out the limitation of watt governor. Q10. Derive an expression for the power of porter governor. Q11. Calculate the speed of porter governor, if each arm is 200 mm long, mass of each ball is 4 kg, central mass on sleeve is 20 kg on the radius of rotation is 130 mm. Q12. In a porter governor, the mass of each ball is 2 kg and the mass of central load is 20 kg. The arms form an equal sided parallelogram in all positions and each arm is 250 mm long. What must be the equilibrium speed of the governor if the balls rotate in a circle of 200 mm radius? Q13. Give and explain the complete classification of cams with the help of neat sketches. Q14. With the help of neat sketch, explain at least five terms relating to radial or disc cam. Q15. Draw the profile of cam to raise a knife edge follower with S.H.M. through 50 mm in cam rotation, keep it raised for 30 0 rotations and to lower it with S.H.M. in The minimum radius of cam is 25 mm. Q16. A cam drives flat reciprocating follower in the following manner: During first rotation of the cam, follower move outwards through a distance of 20 mm with S.H.M. The follower dwells during next 30 0 of cam rotation. During next of cam rotation, the follower moves inwards with S.H.M. The follower dwells for the next 90 0 of am rotation. The minimum radius of cam is 25 mm. Draw the profile of cam. Q17. What is slip? Derive an expression for the total slip in the belt drive. Q18. What is chain drive? What are the advantages and disadvantages of chain drive over belt drive? Q19. Find the length of the open belt driving two parallel shafts 3.5 m apart. The shafts are mounted by tow pulleys of 30 cm and 60 cm diameters. What additional length is required in cross belt drive? Q20. The initial tension in a belt connecting two pulley is 1000 N. The maximum angle of lap of the belt is and coefficient of friction between the belt and pulley is Find the tension on tight and slack side of the belt..x..

6 Assignment-I Workshop Technology III (Up to Mid-Semester Exam) Q1. What is chem.-milling? Describe briefly its principle of working, process and applications. Q2. Explaing clearly the ultrasonic machining process. Briefly describe its advantages and disadvantages. Q3. Define laser. Briefly describe the principle, process and applications of laser beam machining. Q4. Briefly describe advantages and disadvantages of Electron Beam Machining. Q5. Briefly describe advantages and disadvantages of Explosive Forming Process. Q6. Briefly explain the process of AJM and give its applications. Q7. Briefly describe the process of electro discharge machining. Give its applications. Q8. Give advantages and disadvantages of electro-chemical grinding. Q9. Write a short note on electro-chemical machining. Q10. Give advantages and disadvantages of laser beam machining. Q11. What do you understand by the term plastics? Q12. Give classification of plastics. Q13. Write about plastic processing methods. Q14. What do you understand by plastic Moulding techniques? Q15. Write short notes on:- (a) Plastics (b) Blow Moulding Q16. Explain Metal Spraying Process. Q17. What is Hot Dipping? Explain. Q18. Explain the process of Galvanizing. Q19. What is Electroplating? Explain. Q20. What is Anodizing? Explain...x.

7 Assignment-II CNC Machines & Automation (Up to Final Exam) Q1. Define part programming. Differentiate between manual part programming and computer aided part programming. Q2. What are the different types of part programming formats? Q3. Write the basic structure of the part program with example? Q4. Distinguish between Model and no model code. Explain with example. Q5. Differentiate between absolute programming and incremental programming. Q6. Why the repetitive programming is used? Explain its various types. Q7. Explain the concept of cutter radius compensation with the help of diagram. Q8. Explain the steps involved in preparing a part programme. Q9. Distinguish between G code and M code. Q10. Explain the following terms (a) Subroutine (b) Do Loops Q11. Explain the use of following code. M02, M03, M05, M30. Q12. Explain the following terms (i) Preparatory functions (ii) Miscellaneous functions. Q13. What are common problems in? (i) Mechanical components of CNC (ii) Electrical components of CNC. Q14. Explain the various fault-finding techniques. Q15. Explain in details the line fault diagnosis tools CNC. Q16. Define Automation. Discuss its various types. Q17. State advantages and disadvantages of automation Q18. How mechanization is different from automation? Explain briefly. Q19. List the various components of an automated system. Explain the function of each briefly. Q20. What is the need of automation?.....x

8 Assignment-II Computer Integrated Manufacturing (Up to Final Exam) Q1. What is process planning? Q2. Explain CAPP System? Q3. Explain (a) (b) Retrieval type CAPP System Generative CAPP System. Q4. What are application programme. Explain Q5. What is database system for machineability? Q6. What are the modules for development of a programme? Q7. Explain parameter selection and post processing. Q8. What are the points to be kept in mind while machine and tools selection. Q9. What is Implementation and Coding? Explain Q10. What is the Conclusion for Computer Aided process planning? Q11. Identify & describe the various building block modules of the FMS existing in your laboratory or for the FMS observed during an industrial visit. Q12. Explain the use of B axis of machining centers in the manufacture of prismatic component in FMS. Q13. Explain the advantages of modular Construction of machining centre. Q14. List steps in various methods of tool supply in an FMS. Q15. Discuss with the help of an information flow chart a tool management system meant for FMS. Q16. Describe the need and details of five work piece measurement cycles. Q17. Describe the hardware & Software configurations of an FMS system. Q18. Explain the Advantages of FMS with examples of components which can be manufactured. What are the limitations of FMS? Q19. What is the need of tool and work piece coding? Explain with examples. Q20. What is meant by AS / RS? How is it implemented in FMS? X.

9 Assignment-II Industrial Engineering (Up to Final Exam) Q1. Define job evaluation? Explain its concept. Q2. Explain the various commonly used methods or system of job evaluation. Q3. Explain objectives & procedure for job evaluation. Q4. Explain rating scale method and check list method of merit rating. Q5. What are the Advantages and Disadvantages of point method? Q6. Explain continuous & intermittent production. Q7. What were the characteristics of continuous or process production and job order production? Q8. Explain closed job shop and open job shop. Q9. Define forecasting and explain its concepts. Q10. Explain correlation analysis and linear regression analysis. Q11. A comparison of monthly sales of an expensive item, against the total number of visits made by salesman during the previous month, yields the following data. Is the correlation of the two variables good enough to enables the number of sales visits, to be adopted as an efficient indicator of future sales? Sales ( x ) Visits made ( y ) Q12. What is Technological Forecasting? Explain. Q13. Explain the various strategies used to absorb fluctuations in demand. Q14. Explain the procedure of process planning. Q15. Find the economic batch quantity using the data given below: Set-up cost = Rs. 20 per set-up Annual requirements or yearly consumption of parts Inventory carrying cost Cost per part = 1000 = 10% of value/year = Rs.2 Q16. Explain the concept of scheduling. Q17. What is production control? Explain? Q18. Explain centralized and decentralized dispatching. Q19. Explain line of balance. Q20. Explain the advantages and application of line of balance. x.

10 Assignment-II Refrigeration & Air Conditioning (Up to Final Exam) M.M. =100 Q1. Explain the terms: (a) Relative humidity. (b) Specific humidity. Q2. Explain the following in brief: (a) Dew point temperature. (b) Vapour pressure. Q3. Describe the use of psychrometric chart in solving air conditioning problems. Q4. Explain the terms: (a) Room sensible heat factor. (b) By pass factor. Q5. Show the following processes on psychrometric chart and draw on your answer sheet: (a) Sensible heating and cooling (b) Heating and humidification Q6. (a) Define humidity ratio. (b) What is by pass factor? Q7. Explain the following in brief. (a) Enthalpy (b) Specific heat Q8. How the air conditioning systems are classified? Q9. Give a brief description of the various components of an air conditioning system. Q10. Explain the working of a window type air conditioner by drawing a line sketch. Q11. Give the layout of a modern air conditioning system. Q12. Describe with a neat sketch the working of a year the round air-conditioning system. Q13. What is the meaning of air conditioning? Q14. Explain the principle of evaporative cooling. Q15. Why desert cooler fails to work during rainy season? Q16. Give the comparison of desert cooler and a window type air conditioner. Q17. Explain the method of manufacturing ice for commercial purpose. Q18. Draw the layout of an ice plant? Q19. How good quality ice is produced? Q20. Draw the layout of a cold storage and briefly explain the function of each part...x..

11 Assignment-II Theory of Machines (Up to Final Exam) Q1. Explain with the help of neat sketch simple gear train and give an expression for its speed ratio. Q2. Explain with the help of neat sketch compound gear train and give an expression for its speed ratio. Q3. A spur gear has 36 teeth and 1.25 mm of module. It rotates at 250 r.p.m. Calculate their circulars pitch and pitch line velocity. Q4. Two parallel shafts are connected by spur gears. The distance between the shafts is 600 mm. If one shaft runs at 120 r.p.m and other at 240 r.p.m find the number of teeth on each wheel. Take common module as 8. Q5. A total speed reduction of 12 to 1 is required in two steps by means of spur gears. The wheel s available range from 20 teeth to that of 120 teeth in steps of 5. There is only one wheel having a particular number of teeth. Give the neat sketch of gear train also. Q6. Derive an expression for the force required to move a body up an inclined plane considering and without considering friction. Q7. What is clutch? What are its different types? Explain conical clutch with the help of neat sketch. Q8. A 200-mm diameter valve, against which a steam pressure of 2.5 N / mm 2 is acting, is closed by means of square threaded screw of 50 mm external diameter with 8 mm pitch. Find the torque required to turn the handle. Take µ = Q9. An axial thrust on a flat pivot is 10 KN. The coefficient of friction between the contacting surfaces is The diameter of the shaft is 250 mm and it rotates at 200 r.p.m. Find the power lost in overcoming friction using both conditions of uniform pressure and uniform wear. Q10. Find the maximum efficiency of screw jack if coefficient of friction between screw and nut is Q11. Explain the method of balancing of different masses revolving in the same plane. Q12. Explain the difference between static and dynamic balancing. Q13. Two masses of magnitude 5 kg and 10 kg are attached to disc. The radii of rotation of these masses are 60 cm and 90 cm respectively and are 90 0 apart. Find the magnitude and angular position and mass placed at 80 cm radius which will make the unbalanced force on the axis zero at all the speeds. Q14. A, B, and C are the centre of gravity of three masses revolving in the same plane about a centre O in that plane. OA = 0.35 m, OB = 0.5 m and OC = 0.4 m. AOB = 90 0 and BOC = The mass C is 25 kg. Find the masses A and B so that the system is in complete balance. Q15. A shaft has four discs P, Q, R and S along its length 100 mm apart. A mass of 0.8 kg is placed on Q at a radius of 20 mm. A mass of 2 kg is placed on R at a radius of 30 mm and rotated from the mass on Q. Find the masses to be placed on P and S at a radius of 25 mm that will produce total balance. Q16. What are the main causes and harmful effects of vibrations in machines? Also suggest remedial measures. Q17. What do you understand by vibrations? Name and explain different types of vibrations. What are the causes of vibrations in machine? Q18. A steel shaft 100 mm diameter is freely supported at two ends 1 m apart. It carries a mass of 200 kg at the midpoint. Neglecting mass of the bar, find the frequency of transverse vibrations. Take E = 200 GN / m 2.

12 Q19. A shaft 100 mm diameters and 1 m long are fixed at one end and carry a flywheel of mass 1 tonne at the other end. The radius of gyration of flywheel is 0.6 m. Find the frequency of torsional vibrations if the modulus of rigidity of the shaft material is 84 GN / m 2. Q20. Find the frequency of torsional vibrations in the above problem assuming radius of gyration as 0.6 m and modulus of rigidity for the shaft material as 80 GN / m 2..x...

13 Assignment-II Workshop Technology III (Up to Final Exam) Q1. What is the function of gears? Give the general utilization of spur and bevel gears. Q2. Explain module, pitch circle diameter and addendum as applied to spur gears. Q3. Define diametral and circular pitch and state the relationship that exists between the two. Q4. What are the common methods of gear making known to you? Classify gear generating process. Q5. Define the process of gear shaping and gear hobbing. Explain the difference between them. Q6. What are the advantages of gear hobbing process over other gear generating processes? Q7. List various operations carried out on a hobbing machine other than gear hobbing. Q8. What do you understand by surface roughness and how it is expressed? Q9. Name the characteristics of surface roughness measured to obtain and evaluation of the surface? Q10. Define lapping. Describe how lapping is done and name a few parts where it is used. Q11. Describe briefly various purpose of having a job. Name a few parts where honing is done. Q12. Compare and contrast the working principle of honing process with lapping process. Q13. Clearly make out the difference in honing and lapping as you understand. Mention at least two applications of each. Q14. Describe briefly lapping and honing processes and also write their applications in industries. Q15. Distinguish between Jig and Fixture. Give at least two applications of each. Q16. What are the fundamental principles of Jig and Fixtures design? Q17. What are the advantages and drawbacks of introducing Jigs and fixture? Q18. Why should a drill jig have four legs (or feet) and neither more and nor less? Q19. Name and sketch different types of clamping arrangements used in a jig or fixture Q20. What are the different types of bushes used in a jig? Make this clear with neat sketches. x.

Ch. 1 Theory of Metal Cutting

Ch. 1 Theory of Metal Cutting May 1 Nov - 1 1. Explain types of chips that occur in metal cutting. Why a built up edge on a tool is undesirable and also explain reason behind various chip formation. 4