Mr.karmt

1) Answer all the following questions: 1. Describe the working principle of the lathe. The main function of a lath is to remove metal from a job to give it the required shape and size . The job is securely and rigidly held in the chuck or in between centers on the lathe machine and the turn it against a single point cutting tool which will remove metal from the job in the form of chips.  2. Explain the parts of a centre lathe using neat sketch. 1. Speed lathe (a) Wood working  (b) Spinning (c) Centering (d) Po1ishing 2.Center or engine lathe a) Belt drive (b) Individual motor drive  (c) Gear head lathe  3.Bench lathe 4. Tool room lathe  5.Capstan purpose lathe  6. Special purpose lathe (a) Whee1 lathe  (b) Gap bed lathe (c) Dup1icating lathe ) (d) T -lathe  7.Automatic lathe 3. Explain the parts of a centre lathe using neat sketch. 4. Explain following parts of a lathe by neat sketches: (i) Lathe Bed (ii) Carriage (iii) Headstock (iv) Tailstock 5....

1) Answer all the following questions: 1. Show the nomenclature of a single point cutting tool using orthographic projections. 2. Show nomenclature of the following cutting tools: (i) Single point cutting tool (i) Back rake angle (ii) Side rake angle (iii) End relief angle (iv) Side relief angle (v) End cutting edge angle (vi) Side cutting edge angle 3. Explain orthogonal cutting and oblique cutting 4. Explain mechanism of chip formation with neat sketches. 5. Explain various types of chips with neat sketches. 6. Describe the various types of chips in metal cutting. 1. What is a chip breaker Chips are separated from the workpiece to impart the required size and shape to the workpiece. 2. Orthogonal cutting cutting edge at 90 to the direction of job tool motion 3. Oblique cutting cutting edge inclined in plane view 4. Friction of chip and tool. continuous chip with built-up edge. During cutting operation, the temperature rises and as the hot chip passes over s the face of the tool, allo...

1) Answer all the following questions: 1. What is welding? How is it classified? Welding is a process for joining two similar or dissimilar metals by fusion. 2. What are the advantages, disadvantages and applications of welding joints over other joints? ADVANTAGES OF WELDING 1. Welding is more economical and is much faster process as compared to other 2. Welding, if properly controlled results permanent joints having strength equal or sometimes more than base metal. 3. Large number of metals and alloys both similar and dissimilar can be joined by welding. 4. General welding equipment is not very costly. 5. Portable welding equipments can be easily made available. 6. Welding permits considerable freedom in design. 7. Welding can join welding jobs through spots, as continuous pressure tight seams, end-to-end and in a number of other configurations. 8. Welding can also be mechanized DISADVANTAGES OF WELDING  1. It results in residual stresses and distortion of the workpieces.  2....

1) Answer all the following questions: 1. Define casting. What four basic steps are generally involved in making a casting? *It means pouring molten metal into a refractory mold cavity and allows it to solidify.  1. Initially a suitable size of molding box for creating suitable wall thickness is selected for a two piece pattern. Sufficient care should also be taken in such that sense that the molding box must adjust mold cavity, riser and the gating system (sprue, runner and gates etc.) . 2.Next, place the drag portion of the pattern with the parting surface down on the bottom (ram-up) board  3.The facing sand is then sprinkled carefully all around the pattern so that the pattern does not stick with molding sand during withdrawn of the pattern 4. The drag is then filled with loose prepared molding sand and ramming of the molding sand is done uniformly in the molding box around the pattern. Fill the molding sand once again and then perform ramming. Repeat the process three four...

1) Answer all the following questions: 1. How are engineering materials classified? Metals and alloys are further classified into two major kind namely ferrous metals and non-ferrous metals. 2. How ferrous metals differ from non-ferrous metals? (a) Ferrous metals are those which have the iron as their main constituent, such as pig iron, cast iron, wrought iron and steels . (b) Non-ferrous metals are those which have a metal other than iron as their main constituent, such as copper, aluminium, brass, bronze, tin, silver zinc, invar etc 3. State the name of important iron ores? 1. Pig iron 2. Cast iron 3. Wrought iron 4. Steel 4. How cast iron differs from steel? cast iron varies from 1.7% to 6.67% but carbon content maximum up to 1.7%. 5. Write short notes on ? (i) Pig iron C=1.7% to 6.67%. (ii) Grey cast iron C = 2.5 to 3.8% (iii) White cast iron C = 3.2 to 3.6% (iv) Ductile cast iron C=3.2 to 4.2% (v) Malleable cast iron. 6. Discuss in brief the effect of impurities in cast iron? Impu...

1) Answer all the following questions: 1. What do you mean by industrial safety? What are major safety objectives? Industrial safety is defined as policies and protections put in place to ensure plant and factory worker protection from hazards that could cause injury 2. What is an accident? Describe briefly the common causes and sources of accidents. are the mishaps leading injury to man, machines or tools and equipment and may cause injury and result either death or temporary disablement or permanent disablement of the industrial employees. 3. Explain in brief the various methods of safety adopted in plant. 1. Because of ignorance to work with equipment's, hand tools, cutting tools and machine tools. 2. Operating machine and equipments without knowledge. 3. Extra curiosity to work without knowing. 4. Due to poor working conditions. 5. Because of speedy work. 6. Improper method to work. 7. Due to use of improper tools. 8. Because of lack of discipline. 9. Uninterested in w...

1) Answer all the following questions:   1. How do you classify the manufacturing processes? products may be classified into six major groups as primary shaping processes, secondary machining processes, metal forming processes, joining processes, surface finishing processes and processes effecting change in properties. 2. Define the manufacturing engineering? It is therefore a study of the processes required to make parts and to assemble them in machines. 3. List the advanced manufacturing engineering? 1. Process planning. 2. Process sheets. 3. Route sheets. 4. Tooling. 5. Cutting tools, machine tools (traditional, numerical control (NC), and computerized numerical control (CNC). 6. Jigs and Fixtures. 7. Dies and Moulds. 8. Manufacturing Information Generation. 9. CNC part programs. 10. Robot programmers. 11. Flexible Manufacturing Systems (FMS), Group Technology (GT) and Computer integrated manufacturing (CIM). 4. Distinguish between ‘primary’ and ‘secondary’ processes?...

1. In fiber optics, the signal source is ___ waves.  a) light b) radio c) infrared d) very low frequency  2. Which of the following primarily uses guided media?  a) cellular telephone system b) local telephone system c) satellite communications d) radio broadcasting  3. When we talk about unguided media, usually we are referring to ___.  a) metallic wires b) nonmetallic wires c) the atmosphere d) None of the above  4. Fiber-optic communication system uses.  a Simplex transmission b half-duplex c full-duplex d None of the above  5. The concept of connected computers sharing resources is called ___.  a) Internetworking b) Intranetworking c) Networking d) None of the above  6. A _______ is the physical path over which a message travels.  a) Path b) Medium c) Protocol d) Route 7. Which of this is not a network end device?  a) PC b) Smartphones c) Servers d) Switch 8. A _________ set of rules that governs data communication.  a...