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Description :

Explain the method of repetition to measure horizontal angle using transit theodolite. 

Answer :

Procedure: 1 Suppose the angle AOB is to be measured by the repetition process. The theodolite is set over O. The instrument is centered and levelled properly.Vernier A is set at 00 and vernier is at 1800 ... 8 The mean of the two angles obtained from two faces gives the actual angle AOB. 

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Description :

What is GPS. State any four uses of GPS

Answer :

GPS is satellite navigation system used to determine the ground position of an object. Uses of GPS: 1.To prepare contour map 2 It is widely used in navigation. 3. To locate different points of ... fix alignment , positions of piers etc. 6 It gives accrate timing to banks, mobile oprators etc.

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Description :

Explain the procedure of establishing grade contour on ground.

Answer :

The grade contour along hill side can be established by following procedure. Suppose a grade contour of 1 in 30 is to be established on ground at an interval of 40 m. The points of grade contour ... joining all the marked points will give us the required grade contour of 1 in 30 accurately  

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Description :

State the fundamental axes of theodolite. 

Answer :

1 Vertical axis 2 Axis of plate level 3 The line of collimation 4 Horizontal axis or Trunnion axis 5 The bubble line of the altitude level 

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Description :

Define degree of curve.

Answer :

The angle subtended at the centre of the circle by a chord of standard length of 30m is known as degree of curve. 

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Description :

State four objective of tachometry.

Answer :

1. Preparation of contour maps 2. Used in hydrographic survey 3. Location of roads, railways , reservoir. 4. To enable horizontal and vertical distances to be computed from readings upon a stadia rod in difficult terrain. .

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Description :

Define swing of telescope

Answer :

It the process of turning the telescope in horizontal plane about vertical axis.

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Description :

Define the terms- latitude and departure. 

Answer :

Latitude : The projection of survey line parallel to meridian is called latitude. OR Projection of survey line parallel to N-S direction is called latitude. Departure: The projection of survey ... is called departure. OR Projection of survey line parallel to E-W direction is called departure.

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Description :

State the advantages of digital planimeter.. 

Answer :

1.It gives more accurate reading. 2.No calculation are required for area. 3. Less time required for measurement of area. 4 Area can be measured in any desired unit.

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Description :

State the uses of contour map. 

Answer :

Following are the uses of contour maps. 1.The nature of the ground surface or topography of a country weather hilly, undulating ,or flat can be understood. 2. For determining the ... volume of cutting and embankment in given gradient. 6.For determining intervisibility of given points. 

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Description :

Define horizontal equivalent .

Answer :

The horizontal distance between any two successive contours is called horizontal equivalent.

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Description :

Explain seam welding process with the help of neat sketch.

Answer :

Seam Welding is a Resistance Welding (RW) process used for producing continuous joint of overlapping sheets by passing them between two rotating electrode wheels. Heat generated by the electric current flowing through ... the electrodes and cool the work rapidly to speed up the operation.    

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Description :

List the materials used in press work for automobile components parts with example.

Answer :

Materials used in press work: 1) Aluminium, 2) Copper, 3) Brass, 4) Mild Steel, 5) Galvanized iron (G.I) sheets, 6) Duralumin, 7) Y-alloys, 8) Naval Brass, 9) Cartridge Brass, ... 8) Carburettor bodies 9) Valves 10) Combustion Chamber 11) Cylinder heads , blocks,  12) Gear box cases

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Description :

Explain the following press operations (a) Punching (b) Drawing

Answer :

a) Punching: In punching operation, a hole is the desired result. The size of hole is determined by the size of punch and clearance is allowed on the die. The figure shows the spacing of hole on plate2 ... between punch and die is greater. [5] The drawing operation is illustrated in Fig.  

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Description :

Explain drop forging with neat sketch. 

Answer :

Drop Forging Process: Drop forging is carried out by using drop hammers. They are board or gravity hammer, air lift hammer and power drop hammer. Anvil of drop forging hammer is attached to the frame ... [5] This energy will be delivered to the metal work-piece to produce plastic deformation.  

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Description :

State the meaning of G90, G91.

Answer :

Meaning of following G-Codes: G90 :- Absolute Dimensioning G91:- Incremental Dimensioning

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Description :

Define Soldering. Give one application of soldering. 

Answer :

Definition of Soldering:- Soldering is a method of uniting two or more piece of metal by means of a fusible alloy or metal, called solder, applied in the molten state. Applications of Soldering ... 9. Refrigeration and plumbing machine tools components,  10. Copper foil in stained glass work. 

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Description :

Give Classification of Presses.

Answer :

1. Classification on the basis of source of power. Manual Presses.  Mechanical presses. Hydraulic Presses. Pneumatic Presses. 2. Classification on the basis of number of slides. Single ... - Frame Presses. Gap Frame Presses. Straight Side Presses. Horn Presses. Inclibable Press

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Description :

Enlist any four forgeable materials.

Answer :

Following are the forgeable materials; Forgeable Materials:  1) Aluminium alloys 2) Magnesium alloys 3) Copper alloys. 4) Carbon and low alloy steels 5) Martensitic stainless steels 6) ... ) Columbium alloys 10) Tantalum alloys 11) Molybdenum alloys 12) Tungsten alloys 13) Beryllium.

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Description :

What is interpolation? State its types. Explain linear interpolation with neat sketch

Answer :

Definition : When the feed rates of individual axis are not constant and they vary continuously through the move it is called interpolation. Following are the types of interpolation: 1. G00- Rapid Traverse 2. ... to clear the job for loading /Unloading N9 M02 EOB  Programme End.  

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Description :

Explain buffing process with neat sketch. 

Answer :

Buffing process :- Buffing is used to give a much higher, lustrous, reflective finish that cannot be obtained by polishing. The buffing process consists in applying very fine ... sporting items, tools, store fixtures, commercial and residential hardware and household utensils and appliances. 

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Description :

State the function of G00, G94, M08 and M30 used in CNC part programming. 

Answer :

1) G00 :- Rapid Traverse Function G00 is the basic G-code for CNC programming to initiate rapid motion mode i.e used for quickly positioning the tool. G00 can be used where the tool is not ... production. As soon as the program ends he can place the next component and start the next cycle. 

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Description :

What are the application of CNC machines?.

Answer :

Drill press Milling and turning centres Boring machines Surface grinders Manufacturing industries etc.

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Description :

What are the factors considered while selecting the components for machining on CNC machines?

Answer :

Following are the factors to be considered in selecting components of CNC machines? 1. High precision and repeatability. 2. Reliability. 3. Efficiency -To meet the requirement of high precision. ... should be such that removal of swarf is easy and the chips do not fall on the slideways.

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Description :

State salient features of CNC machines.

Answer :

Salient Features of CNC machines .. 1. A part program can be fed to the controller unit through a keyboard. 2. The part program once entered can be used again and again. That is why ... control unit allows compensation for any changes in the dimensions of cutting tools caused due wear or otherwise. 

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Description :

List various surface finishing processes. Explain lapping.

Answer :

List of Surface Finishing Processes: [1] Grinding [2] Honing [3] Lapping [4] Burnishing [5] Buffing [6] Polishing Lapping Lapping is basically an abrasive process in which ... constantly changing. The effective path is of cycloid in nature. Figure shows the lapping process.  

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Description :

Explain metal spraying process and give two applications.

Answer :

Metal praying of metalizing literally means to treat with or coat with a metal or metallic compound. Metalizing as a process normally includes the preparation of base material, the spraying on ... Its other applications are in having decorative films, reflecting surfaces and special metal forms. 

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Description :

Describe in brief the equipments required for oxy-acetylene welding.

Answer :

The following equipments are required for oxy-acetylene welding. 1. Welding torch or Blowpipe: It is the tool for mixing two gases in the desired volumes and burning the mixture at the end of a ... particularly when the oxides of the base metal have a higher melting point than the metal itself.

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Description :

Describe briefly soldering and brazing operation.

Answer :

Soldering: It is a method of joining two or more pieces of metal sheets by means of a fusible alloy or metal , called solder, applied in the molten state. The melting point of the ... by metallic bonding. Copper, Copper alloys, Silver alloys and Aluminium alloys are used for brazing process. 

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Description :

Name the types of dies used in press work. Explain any one with neat sketch.

Answer :

The various types dies used in press work are: 1. Types of dies according to operations performed (i) Shearing (ii) Bending (iii) Drawing (iv) Squeezing 2. Types of ... giving output. These dies are simple in construction and can manufacture by conventional machining processes.     

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Description :

Describe with neat sketch: (i) Spot Welding (ii)Seam Welding

Answer :

(i) Spot Welding: Spot welding is employed to join overlapping strips, sheets or plates of metal at small areas .The pieces are assembled between two electrodes, which must possess high electrical & ... used to conserve the electrodes and cool the work rapidly to speed up the operation.   

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Description :

List common equipments used for arc welding process.

Answer :

1. A.C. or D.C. machine 2. Electrode (bare or coated) 3. Electrode Holder 4. Cables and its connectors 5. Chipping Hammer 6. Earthing Clamps 7. Wire-brush 8. Helmet 9. Safety Goggles 10. Hand Gloves 11. Apron Sleeves etc.

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Description :

List various pressed products which are used in automobiles.

Answer :

The various pressed products used in automobiles are: 1) Gears 2) Crank Shafts 3) Automobile panels 4) Wires 5) Frames and Chassis 6) Connecting Rods 7) Springs 8) Carburettor bodies 9) Valves 10) Combustion Chamber 11) Cylinder heads , blocks  12) Gear box cases etc.

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Description :

Describe briefly any two die accessories.

Answer :

1. Stops: The stops are used for correct spacing of the sheet metal as it is fed below the punch to give the greatest output in given length of the plate. 2. Pilots: The pilot ... 5. Pressure pad: It is used for drawing operation for maintaining flat surface of the cup   

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Description :

Explain forming and punching operation with neat sketch.

Answer :

Forming: Forming processes are particular manufacturing processes which make use of suitable stresses (like compression, tension, shear or combined stresses) to cause plastic deformation of the materials to produce ... metal from being lifted along with the punch 3 after punching operation.   

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Description :

Name the different types of presses used in industry. State the working principle of press. 

Answer :

Types of presses used in industry: According to Source of power to ram: 1. Crank 2. Cam 3. Eccentric 4. Power screw 5. Rack and pinion 6. Toggle 7. ... ) hydraulic, mechanical, pneumatic and respectively working on principle of Pascal law, Mechanical Pressure and Pneumatic Pressure.

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Description :

Write down the sequence for manufacturing of crankshaft.

Answer :

Forging Sequence for Manufacturing Crank Shaft: [1] Stock is redistributed and size is increased at certain place and reduced at other place by roll forging. [2] After preliminary roll forging, stock is ... 5] Then the finished part is then trimmed in blanking die to remove excess metal or flash. 

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Description :

Describe briefly, hand forging and machine forging. 

Answer :

Hand Forging: [1] Hand forging is the oldest type of metal working process and has influenced the formation of other materials through the age. [2] Smith forging was formerly the process ... the height from which they fall, the higher will be intensity of blow the hammer will provide.

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Description :

Write forging sequence for spanners.

Answer :

Forging Sequence for Spanner: (1) The heated stock is elongated by reducing its cross section in first die. The operation is known as Fullering . (2) The metal is redistributed, increasing the cross ... . (5) Flash is removed. (6) Heat treatment and machining is done as per requirement. 

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Description :

What is Forgability? On which factors it depends?

Answer :

Forgability is defined as the ability of a metal to change size and shape when heated to required temperature and compressed by applying some pressure. OR The ease with which forging is done is called ... of Metals [3] Mechanical Properties of Metals [4] Shape and Size of part to be forged 

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Description :

List any four applications of forging process. 

Answer :

Applications of Forging Process: 1. Connecting rod 2. Crankshaft 3. Camshaft 4. Spanner 5. Alloy wheel 6. Differential gears 7. Drive shafts 8. Clutch hubs 9. Universal joints 10. Hand Tools

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Description :

What is the part programming?

Answer :

Part Programming: [1] A part program is a set of instructions given to a computerized numerical control (CNC) machine to control its operation. [2] CNC part program contains a combination of machine tool ... speed  (d) Feed  (e) Auxiliary functions such as coolant on and off, spindle direction

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Description :

List the components of NC machines.

Answer :

Components of NC Machines: 1. Program input device  2. Memory storage 3. Microprocessor 4. Machine control Unit (MCU) 5. Drive system 6. Machine Tool 7. Feedback system 8. Programmable logic controller (PLC) 9. Machine control panel 10. Operator control panel 11. Tape Reader

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Description :

Name various surface coating processes.

Answer :

Surface coating process: (1) Metallic coating (2) Plastic coating (3) Organic coating (4) Inorganic coatings (5) Conversion coating (6) Other metal coating processes

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Description :

Classify butt welding process.

Answer :

Classification of Butt Welding Processes: 1. Flash Butt Welding 2. Resistance Butt Welding 3. Hand Welding 4. Upset Welding

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Description :

State the factors on which weldability depends.

Answer :

Factors on which weldability depends: 1. Material grade, material thickness, design, weld property requirement 2. Equipment type, edge preparation design 3. Tip / work piece distance, ... Cost of materials 15. Code or specification requirements 16. Mechanical properties desired in joints

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Description :

Explain blanking operation. 

Answer :

Blanking: The blanking is the operation of cutting of flat sheet to the desired shape. The piece detached from strip is known a blank. The metal punched out is the required product and the plate ... die and the clearance is left on the punch. Blanking is always performed as the first operation. 

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Description :

State any two advantages of forging process. 

Answer :

Advantages of forging processes: 1) Complex shaped parts can be forged 2) Mass production with greater accuracy is achieved. 3) It is very easy to maintain close tolerances. 4) ... highly skilled operator. 6) Better reproducibility. 7) Machining is not necessary to obtain final shape 

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Description :

Enlist press operations . Explain lancing and piercing. 

Answer :

Press Operations: [1] Cutting or Shearing Operations: Blanking, Punching, Piercing, Notching, perforating, trimming, shaving, slitting, lancing. [2] Bending Operation: Angle bending [3] Forming ... clearance is provided on the die. Figure shows punch and die set for piercing. 

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Description :

Give application of lapping, honing, buffing and burnishing.

Answer :

Applications of Lapping: Press work dies, Moulding dies, Limit gauges, Surface plates, Engine valve and valve seat, Races of ball and roller bearings, Gears, Piston rings, Slip gauges, ... the surface. Burnishing components are Cam & followers, matting parts of engine, aesthetical components etc.

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