Workshop Technology detailed syllabus for Diploma in Refrigeration and Air Conditioning (RAC) for C20 regulation curriculum has been taken from the APSBTET official website and presented for the RAC students. For course code, course name, number of credits for a course and other scheme related information, do visit full semester subjects post given below.
For Diploma in Refrigeration and Air Conditioning 1st Year scheme and its subjects, do visit RAC 1st Year C20 regulation scheme. The detailed syllabus of workshop technology is as follows.
Course Objectives
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Course Outcomes:
- Categorise basic workshop tools , i.e., marking and measuring tools, cutting tools etc., Explain different operations used in carpentry, fitting, forging and sheet metal.
- Describe the process like marking, sawing, chiselling in wood working process and fitting, upsetting drawing down and punching in forging, shearing, bending, drawing, squeezing in sheet metal
- Describe the functions of sensitive and radial drilling machines and operations on drilling machine
- Describe the sequence of pattern making operations
- Describe casting and special casting processes
- Describe the hot working and cold working processes
1. Introduction
Methods of manufacturing processes – casting, forming, metal removal processes, joining processes, surface finishing processes, basic workshop processes – carpentry, fitting, hand forging, machine forging, sheet metal work, cold and hot working of metals.
Carpentry
Marking & measuring tools: scales, rules, fourfold wooden rule, flexible measuring rule (tape), straight edge, try square, bevel square, combination square, marking knife, marking gauge, mortise gauge, cutting gauge, wing compass, trammel, divider, outside calliper, inside calliper, odd leg calliper, spirit level, plum bob, specifications- uses.
Cutting Tools
- Saws: ripsaw, cross cut saw (hand saw), panel saw, tenon or back saw, dovetail saw, bow saw, coping saw, compass saw, pad or keyhole saw, specifications & uses.
- Chisels: Firmer chisel, bevelled edge firmer chisel, parting chisel, mortise chisel, inside and outside gauges, specifications and uses.
- Planes: Jack plane (wooden jack plane, metal jack plane),rough plane, smoothing plane, rebate plane, plough plane, router, spoke shave, special planes and their specifications and uses.
Boring Tools:
Gimlet, braces- wheel brace, ratchet brace, bit-shell bit, twist bit (auger bit), expansive bit, centre bit, router bit, countersink bit, drill, reamer their specifications & uses.
Striking Tools:
Hammers – Warrington hammer, claw hammer, mallet, Specifications & uses.
Holding Devices
Bench vice, bench stop, bench hold fast, sash cramp (bar cramp) G- cramp, Hand screw, specifications & uses.
Miscellaneous Tools
Rasps and files, scraper, oilstone, glass paper, pincer, screw driver, cabinet screw driver, ratchet-screw driver, saw set, oil stone slipspecifications and uses.
Carpentry Processes
Marking, measuring, sawing, chiselling, planning, boring, grooving, Rebating & moulding.
Carpentry Joints
Halving Joint, mortise and tenon joint, bridle joint, butt joint. dowel joint, tongue & groove joint, screw & slot joint, dovetail joint, corner joint.
Wood Working Machines
Wood working lathe (wood turning lathe), circular saw, band saw, wood planer, sanding machine, belt sander, spindle sander, disc sander and grinder, specifications and uses.
Fitting
Cutting tools
- Chisels: Flat chisel, cross cut chisel, half round chisel, diamond point chisel, side chisel, specifications and uses.
- Files: Different parts of a file – sizes and shapes – flat file, hand file, square file ,piller file ,round file, triangular file, half round files, knife edge file, needle file – specifications and uses.
- Scrapers: Flat, triangular, half round scrapers, specifications & uses.
- Saws: Hand hacksaw – solid frame, adjustable frame, specifications & uses, hand hacksaw blades. Power hack saw -description(horizontal reciprocating type), power hacksaw blade, specifications and uses, teeth set – saw material.
- Drill bits: Flat drill, straight fluted drill, twist drill, parallel shank, tapered shank, specifications & uses.
- Reamer: Hand reamer, machine reamer, straight and spiral flutes
- reamers, specifications and uses.
- Taps: Hand taps – taper tap, plug tap and bottoming tap,specifications and uses.
- Dies & Sockets: Dies- solid, adjustable – specifications and uses.
Striking Tools
Hammers: Parts, ball peen, cross peen, straight peen hammers, soft hammer, sizes, specifications and uses.
Holding Devices
Vices: Bench vice, leg-vice, hand vice, pin vice, tool maker’s vice, pipe vice, care of vices, specifications and uses.
Marking Tools
Surface plate, V-block, angle plate, try square, scriber, punch, prick punch, centre punch, number punch, letter punch, specifications and uses.
Miscellaneous Tools
Screw drivers, spanners, single ended & double ended, box type, adjustable spanners, cutting pliers, nose pliers, allen keys, specifications and uses.
Checking and Measuring Instruments
Checking Instruments:
- Callipers: Outside & Inside callipers, hermaphrodite (odd leg) calliper with firm joint, spring callipers, transfer calliper sizes & uses, dividers -sizes & uses.
- Measuring instruments:Combination square, bevel protractor, universal bevel protractor, sine bar, universal surface gauge, engineer’s parallels, slip gauges, plane gauge, feeler gauge, angle gauge, radius & template gauge, screw pitch gauge, telescopic gauges, plate & wire gauge, ring and plug gauges, snap gauges specifications & uses, vernier callipers, vernier height gauge, vernier depth gauge, micrometer – outside & inside, stick micrometer, depth micrometer, verniermicrometer, screw thread micrometer specifications and uses.
Fitting Operations
Marking, sawing, chipping, filing, scrapping, grinding, drilling, reaming, tapping and dieing.
Forging
- Hand forging tools: Anvil, swage block, hand hammers – types; sledge hammer, specifications and uses, tongs – types, specifications & uses, chisel – hot & cold chisels specifications & uses. swages – types and sizes, fullers, flatters, set hammer, punch and drift – sizes and uses.
- Equipment: Open and closed hearth heating furnaces, hand and power driven blowers, open and stock fire, fuels-charcoal, coal, oil gaseous fuels.
- Smith Operations: Upsetting, drawing down, setting down, punching, drifting, bending, welding, cutting, swaging, fullering and flattering.
- Machine Forging: Need of machine forging, forging hammers – spring hammer, pneumatic hammer, drop hammer, forging press, hydraulic press – line diagram, machine forging operations – drawing, upsetting, punching, tools used in machine forging.
- Forging defects: Types and remedies.
Sheet Metal Work
Metals used for sheet metal work.
- Sheet metal hand tools:Measuring tools – steel rule, circumference rule, thickness gauge, sheet metal gauge, straight edge, scriber, divider, trammel points, punches, chisels, hammers, snips or shears, straight snip, double cutting shear, squaring shear, circular shear, bench & block shears.
- Stakes: Double seaming stake, beak horn stake, bevel edged square stake, Hatchet stake, needle stake, blow horn stake, hollow mandrel stake, pliers (flat nose and round nose), grocers and rivet sets, soldering iron, specifications & uses.
Sheet Metal Operations
- Shearing: Cutting off, parting, blanking, punching, piercing, notching, slitting, lancing, nibbling and trimming.
- Bending: Single bend, double bend, straight flange, edge hem, embossing, beading, double hem or lock seam.
- Drawing: Deep drawing, shallow or box drawing.
- Squeezing:Sizing, coining, hobbing, ironing, riveting.
Sheet Metal Joints
Hem Joint: single hem, double hem & wired edge, seam joint -lap seam, grooved seam, single seam, double seam, dovetail seam, burred bottom seam or flanged seam.
Fastening Methods
- Rivetting, soldering, brazing & spot welding.
2. Drilling
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3. Foundry.
- Introduction: Development of foundry as a manufacturing process, advantages and limitations of casting over other manufacturing processes.
- Foundry equipment:Hand moulding tools: shovel, riddle, rammers, trowels, slicks, lifter, strike – off bar, sprue pin bellow, swab, gate cutter, mallet, vent rod, draw spike, rapping plate or lifting plate, pouring weight, gagger, clamps, spirit level, moulding boxes, snap box & flash box.
- Sands: Properties of moulding sand – porosity, flowability, collapsibility, adhesiveness, cohesiveness and refractoriness.
- Types of moulding sand : green sand, dry sand, loam sand, facing sand, backing sand, parting sand, core sand, system sand their ingredients and uses.
- Pattern making: Materials such as wood, cast Iron, aluminium, brass, plastics their uses and relative advantages, classification of patterns such as solid (one piece), two piece and three pieces, split patterns, gate patterns and shell patterns, sequence in pattern making, pattern allowances and colour codes.
- Cores: Need of cores, types of cores.
- Casting: green sand and dry sand moulding, cement bonded moulding, shell moulding, ceramic moulding, defects in castings and their remedies.
- Special casting processes: (Principles and applications only) die casting – hot chamber and cold chamber, centrifugal casting, CO2 process, investment casting
4. Mechanical Working of Metals
- Introduction: Hot working and cold working
- Hot working processes: rolling – types of rolling, two high mill, three high mills, four high mills, piercing or seamless tubing, drawing or cupping, spinning, extrusion – direct or forward extrusion, indirect or backward extrusion, tube extrusion, Impact extrusion.
- Effects of hot working of metals, advantages & limitations of hot working of metals.
- Cold working process:Rolling, drawing – wire drawing, tube drawing, bending, roll forming, angle bending, spinning, extrusion, squeezing, cold heading, thread rolling, peening.
- Effects of cold working of metals, advantages & limitations of cold working.
Reference Books:
- Production Technology by Jain & Gupta (Khanna Publishers)
- Elementary Workshop Technology by HazraChowdary & Bhattacharya (Media Promoters)
- Manufacturing Technology (VolI ) by P N Rao (McGraw Hill)
- Workshop Technology Vol I & II by 97 Raghuvamshi
For detailed syllabus of all other subjects of Diploma in Refrigeration and Air Conditioning, C20 regulation curriculum do visit RAC 1st Year subject syllabuses for C20 regulation.
For all Diploma in Refrigeration and Air Conditioning exam timetable, visit APSBTET RAC all semester exam timetable direct link.