Riveted Joints

Riveted Joints

1. Lap joint

When the plates to be joint, are bring together which overlap each other at face, and rivet inserted in overlap section as shown in figure, the joint is known as lap joint 

According to the number of rows of rivets and its arrangement, this joint is further classified as follow 

a. Single riveted lap joint:

In this joint, the rivets are inserted in the single line, that's why it is called as single riveted lap joint.

b.Double riveted lap joint:

In this joint, the rivets are inserted in the double line, that's why it is called as double riveted lap joint. 

c.Chain riveted lap joint:

d.Zig-Zag riveted lap joint:

Butt joint:

In this type of rivet joint both plates are bring together without overlap each other and joint are made by use of one or two cover plate as shown in figure. 

According to cover plates, number of rows of rivets and arrangement, this joint is classified as follow 

a.Single straps butt joint:

In this joints, there is only one cover plate used so it is known as single strap butt joint.

b.Double straps butt joint:

In this joint cover plates are used both side of the work piece, so it is known as double straps butt joint.

Rivet

Rivet and Riveting

A rivet is a permanent mechanical joint which are broadly used to joint structure, ships, barrels etc. These joints are widely used in ship and boiler industries to join the structure member.

Parts of Rivet

The process by which two plates are joints together by use of rivet is called riveting

Types of Rivet Heads

According to Indian standard specifications, the rivet heads are classified into the following three types :

1. Rivet heads for general purposes (below 12 mm diameter) as shown in Fig. 9.3, according to IS : 2155 – 1982 (Reaffirmed 1996).

2. Rivet heads for general purposes (From 12 mm to 48 mm diameter) as shown in Fig. 9.4, according to IS : 1929 – 1982 (Reaffirmed 1996).

3. Rivet heads for boiler work (from 12 mm to 48 mm diameter, as shown in Fig. 9.5, according to IS : 1928 – 1961 (Reaffirmed 1996).

FILING PRACTICE

 Filing practice

Hand files are normally held in both hands. The file is held flat against the surface it is to cut / smooth. The file is then pushed forward and it cuts on the forward stroke. It is then lifted away from the metal and returned to the starting point for the next push forward.
This is called ‘through filing’

If the surface produced by through filing is not good enough - the next stage is ‘draw filing’. The diagram above shows how the file is held during this process. The file is held in both hands by the blade and pushed forwards and backwards along  the material. This will further smooth the material.

If the surface produced by through filing is not good enough - the next stage is ‘draw filing’.
The diagram above shows how the file is held during this process.
The file is held in both hands by the blade and pushed forwards and backwards along
 the material. This will further smooth the material.

The safe edge of a file does not have teeth. This is extremely useful when filing in corners as shown in the diagram below. The safe edge is placed into the corner and because it is smooth it does not damage the surface of the metal.

GAS WELDING

GAS WELDING - OXYACETYLENE

Oxyacetylene gas welding is commonly used to permanently join mild steel. A mixture of oxygen and acetylene, burns as an intense / focussed flame, at approximately 3,500 degrees centigrade. When the flame comes in contact with steel, it melts the surface forming a molten pool, allowing welding to take place. Oxyacetylene can also be used for brazing, bronze welding, forging / shaping metal and cutting.

Mechanical Questions

1. One micrometer (U) is equal to...

A. 0.1mm

B. 0.01mm

C. 0.001mm

D. 0.0001mm

2. The caliper meant for measuring the width of a slot is...

A. Odd leg caliper

B. Outside caliper

C. Jenny caliper

D. Inside caliper

3. For cutting thin tubing, the most suitable pitch of thehacksaw blade is...

A. 1.8mm

B. 1.4mm

C. 1mm

D. 0.8mm

4. For cutting solid brass, the most suitable pitch of thehacksaw blade is...

A. 1.8mm

B. 1.4mm

C. 1mm

D. 0.8mm

  .

 .

5. A new hacksaw blade after a few strokes becomes loosebecause of the...

A. Stretching of the blade

B. Wing-nut threads being worn out

C. Wrong pitch of the blade

D. Improper selection of the set of saws.

6. While cutting small diameter pipes, it is advisable towatch regularly and ensure that...

A. The cut is along the curved line

B. More saw teeth are in contract

C. The work is not overheated

D. Proper balancing of hacksaw is maintained

7. The vice clamps are used to...

A. Protect hard jaws

B. Clamp the work pieces rigidly

C. Protect the finished surfaces

D. Prevent the movable jaw being filed

8. The number of threads per inch can be checked with a

A. tool gauge

B. metric rule by counting

C. ring gauge

D. screw pitch gauge

9. The bottom surface joining the two sides of adjacent thread ( external thread ) is...

A. Flank

B. Root

C. Crest

D. Pitch

10.The dial test indicator shows the measurement as...

A. The actual size of the component

B. The difference between the two steps of 5 mm

C. The magnified small variations in sizes through a pointer

D. The direct reading of the dimension

2nd Semester Multiple Choice Questions

TRADE FITTER

2nd Semester Multiple Choice Questions

Exercise-01 Lathe Construction

1. Which one of the following is not a part of the centre lathe?

(a) Saddle                           (b) Feed rod

(c) Arbor                             (d) Lead screw

2. The headstock of a lathe is situated at the

(a) Right-hand end of the lathe bed       (b) Left-hand end of the lathe bed

(c) Middle of the lathe bed                      (d) Bottom of the lathe bed

3. The horizontal feed, cross feed and screw cutting movement in a lathe is

controlled by

(a) Headstock                       (b)Tailstock

(c) Cross-slide                      (d) Apron

4. A face plate is held at

(a) Headstock spindle         (b) Tailstock

(c) Tool post                      (d) Bed

5. Tumbler gear quadrant is used for

(a) Increasing the speed of the spindle

(b) Decreasing the speed of the spindle

(c) Changing the direction of rotation of the lead screw

(d) Changing the direction of the spindle

6. In a gap bed lathe, the gap is provided

(a) Just below the nose of the headstock spindle

(b) Just below the spindle of the tailstock

(c) In the middle of the bed        

(d) Anywhere in the bed

7. While drilling in lathe, the drill is held in the

(a) Headstock (b) Tailstock

(c) Compound rest (d) Bed

8. Back-gear mechanism is provided in cone pulley headstock to

(a) Reduce the speed of spindle

(b) Increase the speed of spindle

(c) Reverse the speed of spindle

(d) Transmit power from spindle gear to stud gear

9. Lathe bed is made of

(a) Mild steel                       (b) Cast iron

(c) High carbon steel              (d) High alloy steel

10.To prevent lathe bed guideways from damaging by chuck while mounting

(a) Take the help of the supervisor

(b) Support it with screw jack

(c) Lift it with hand crane

(d) Place a wooden piece on the guideways

11.The sliding surfaces of the lathe bed are

(a) Flame hardened              (b) Case hardened

(c) Normalised                      (d) Tempered

12.Which one of the following on a lathe is used to give depth of cut?

(a) Compound slide                (b) Top slide

(c) By adjusting the tool         (d) Cross slide

13.A tumbler gear unit consists of

(a) One gear                      (b) Two gears

(c) Three gears                   (d) Four gears

14.The lathe bed has

(a) One set of 'V guideways and flatways

(b) Two sets of 'V guideways and flatways

(c) Three sets of 'V guideways and flatways

(d) Four sets of 'V guideways and flatways

15.The cross-slide in a lathe moves

(a) Parallel to the axis of rotation                   (b) At any angle to the axis of rotation

(c)Perpendicular to the axis of rotation            (d) Either 'a' or 'b'

16.The carriage in a lathe moves

(a) Parallel to the axis of rotation

(b) At any angle to the axis of rotation

(c) Perpendicular to the axis of rotation

(d) Either 'a' or 'b'

17.Which among the following parts of a lathe should have high compressive

strength?

(a) Bed                             (b) Main spindle

(c) Lead screw                   (d) Sliding gears in headstock

18.The compound slide swivel base is set at 45° to the centre line of lathe. The

degree of the reading at the cross slide index will be

(a) 135°                          (b)90°

(c) 45°                                (d)30°

19.The special gear of 127 teeth or 63 teeth may be used to cut metric threads in a

lathe having British lead screw. It is known as

(a) Idler gear                              (b) Change gear

(c) Translating gear                (d) Compound gear

20.Which one of the following statements is true with respect to the half nut?

(a) It is detachable part of the saddle

(b) It is an integral part of the saddle

(c) It is an integral part of the apron

(d) It is detachable part of the apron

21.What is the function of the drop worm provided in the apron of the centre lathe?

(a) Engages / disengages the power feed

(b) Changes the direction of rotation of the workpiece

(c) Changes the feed direction

(d) Engages / disengages the lead screw

22.The tailstock barrel has an internal taper. Which one of the following standard

tapers is provided in the barrel bore?

(a) Metric taper         (b) Morse taper

(c) Jorno taper            (d) Brown and Sharpe taper

23.A jib is provided between the top slide and the swivel base assembly of the

compound slide. Its purpose is to

(a) Allowing dismantling the top slide easily

(b) Eliminate the backlash of the screw and the nut in the assembly

(c) Adjust the slackness developed due to wear

(d) Permit flow of the lubricant between the sliding surfaces

24.One of the parts of a centre lathe is tumbler gear unit. It is provided to

(a) Change the direction of feed

(b) Transmit motion from feed shaft to the carriage

(c) Change the direction of rotation of the work

(d) Alter the spindle speed

25.The graduations are marked at the base of the tailstock. To offset the body these

graduations are given in

(a) Degrees (b) Taper per foot

(c) mm (d) Radians

26.The capacity of a lathe is expressed as

(a) Horsepower and chuck diameter

(b) Swing and distance between centres

(c) Bed length and spindle speed

(d) Tool post size and lathe travel

27.The carriage of a lathe travels along which axis?

(a) "B" axis              (b) "Z" axis

(c) "Y" axis               (d)"X"axis

28.The basic turning lathe is

(a) Turret lathe                     (b) Automatic lathe

(c) Engine lathe                       (d) Swiss lathe

Key to Exercise - 01

1. c ,2.b, 3.d ,4.a, 5. C,6. a ,7.b ,8.a ,9.b, 10.d,11.a, 12.d ,13.c ,14.b ,15.c,16.a, 17.a,18.c, 19.c ,20.d,21.a ,22.c ,23.c ,24.a, 25.b,26.b, 27.b ,28.c

THE CENTRE LATHE

                                    THE CENTER LATHE

The Centre Lathe is used to manufacture cylindrical shapes from a range of materials including; steels and plastics. Many of the components that go together to make an engine work have been manufactured using lathes.. A basic manual centre lathe is shown below. This type of lathe is controlled by a person turning the various handles on the top slide and cross slide in order to make a product / part.

The headstock of a centre lathe can be opened, revealing an arrangement of gears. These gears are sometimes replaced to alter the speed of rotation of the chuck.The speed of rotation of the chuck is usually set by using the gear levers. These are usually on top of the headstock or along the front and allow for a wide range of speeds.

However, sometimes the only way to set the lathe to a particular speed is to change the gear arrangement inside the headstock.

SYLLABUS FOR THE TRADE OF FITTER-Third and Fourth Semesters

Third Semester (Semester                   Code no. FTR - 03)

Duration : Six Month

Week	Trade Practical	Trade Theory
No.
	True job on four jaw chuck using	Safely precautions to be observed while
	knife tool, face both the ends for	working on a lathe, Lathe specifications,
	holding between centers, Using	and constructional features. Lathe main
	roughing tool parallel turn ± O.1 mm.	parts descriptions- bed, head stock, carriage,
01	Measure the diameter using outside	tail stock, feeding and thread cutting
	caliper and steel rule.	mechanisms. Holding of job between
		centers, works with catch plate, dog, simple
		description of a facing and roughing tool
		and their applications.
	Lathe operations- the facing, parting	Lathe cutting tools- Brief study of the
	and form tools, plain turn, step turn,	nomenclature of Lathe cutting tools and
	holding job in three jaw chuck-	necessity of correct grinding, solid and
02	deburr, chamfer-corner, round, the	tipped, throw away type tools, cutting speed
	ends, Shoulder turn: square, filleted,	and feed and comparison for H.S.S., carbide
	beveled undercut shoulder, turning-	tools. Use of coolants and lubricants.
	filleted under cut, square beveled.
	Cut grooves- square, round „V‟	Chucks and chucking the independent four-
	groove, Make a mandrel-turn	jaw chuck. Reversible features of jaws, the
	diameter to sizes. Knurl the job.	back plate, Method of clearing the thread of
03		the chuck-mounting and dismounting,
		chucks, chucking true, face plate, drilling -
		method of holding drills in the tail stock,
		Boring tools and enlargement of holes.
	Bore holes –spot face, pilot drill,	General turning operations- parallel or
	enlarge hole, using boring tools,	straight, turning. Stepped turning, grooving,
	make a bush step bore-cut recess,	and shape of tools for the above operations.
	turn hole diameter to sizes.	Appropriate method of holding the tool on
04	Turn taper (internal and external).	tool post or tool rest, Knurling: - tools
	Turn taper pins. Turn standard tapers	description, grade, uses, speed and feed,
	to suit with gauge.	coolant for knurling, speed, feed
		calculation.
		Taper – definition, use and
		method of expressing tapers. Standard
		tapers-taper, calculations morse taper.
	Threading practice by using cut	Screw thread definition – uses and
	threads using taps, dies on lathe by	application. Terminology of screw threads,
	hand, „V‟ thread – external. Prepare a	square, worm, buttress, acme ( non
	nut and match with the bolt.	standard-screw threads),Principle of cutting
05		screw thread in centre lathe –principle of
		chasing the screw thread – use of centre
		gauge, setting tool for cutting internal and
		external threads, use of screw pitch gauge
		for checking the screw thread.
	Assembly sliding for using keys and	Screws: material, different types (inch &
06	dowel pin and screw, ± 0.02 mm	metric), uses
	accuracy on plain surface. Testing of	Testing scraped surfaces: ordinary surfaces

	sliding fitting job, scrap on two flat	without a master plate.
	surfaces and curved surfaces.
	File & fit angular mating surface	Special files: types (pillar, Dread naught,
07	plain within an accuracy of ± 0.02	Barrow, warding) description.
	mm & angular 15 minutes angular
	fitting.
	Drill through and blind holes at an	System of drill size, Fractional size:
	angle, using swivel table of drilling	number, letter and metric. Templates and
08	machine,   Precision drilling,	gauges- Introduction, necessity, types. Limit
	reaming and tapping. Test- Job..	gauge: Ring gauge, snap gauge, plug gauge,
		description and uses.
09	Dovetailed fitting, radius fitting.	Description and uses of gauge- types
		(feeler, screw, pitch, radius, wire gauge),
	File and fit, combined fit with	Slip gauge: Necessity of using,
	straight, angular surface with ± 0.02	classification & accuracy, set of blocks
	mm accuracy, hexagonal fitting.	(English and Metric). Details of slip gauge.
	Check adherence to specification and	Metric sets 46: 103: 112. Wringing and
	quality standards using equipments	building up of slip gauge and care and
10	like Vernier calipers, micrometers	maintenance. Application of slip gauges for
	etc.,	measuring, Sine bar-Principle, application
		& specification. Procedure to check
		adherence to specification and quality
		standards.
	Drilling and reaming, small dia. holes	Locking device: Nuts- types (lock nut castle
	to accuracy correct location for fitting	nut, slotted nuts, swam nut, grooved nut)
11	Make male and female fitting parts,	Description and use.
	drill and ream holes not less than
	12.7 mm.
	Sliding fitting, Diamond fitting,	Lapping: Application of lapping, material
	Lapping flat surfaces using lapping	for lapping tools, lapping abrasives,
	plate.	charging of lapping tool. Surface finish
12		importance, equipment for testing-terms
		relation to surface finish. Equipment for
		tasting surfaces quality – dimensional
		tolerances of surface finish.
	Stepped keyed fitting-test job.	Honing: Application of honing, material for
13	Lapping holes and cylindrical	honing, tools shapes, grades, honing
	surfaces.	abrasives. Frosting- its aim and the methods
		of performance.
	Making a snap gauge for checking a	. Manufacture: The name and types of
	dia of 10 ± 0.02 mm.	gauge commonly used in gauging finished
14		product-Method of selective assembly „Go‟
		system of gauges, hole plug basis of
		standardization
	Scrape angular mating surface, scrape	Bearing-Introduction, classification (Journal
	on internal surface.	and Thrust), Description of each, ball
15		bearing: Single row, double row,
		description of each, and advantages of
		double row.
16	Practice in dovetail fitting assembly	Roller and needle bearings: Types of roller
	and dowel pins and cap screws	bearing. Description & use of each

	assembly.		Industrial visit.
	Industrial visit.
	Preparation of gap gauges.		Synthetic materials for bearing: The plastic
			laminate materials, their properties and uses
17			in bearings such as phenolic, teflon
			polyamide (nylon).
18	Dovetail and Dowel pin assembly,		Method of fitting ball and roller bearings
	scraps cylindrical bore.
	Scrapping cylindrical bore and to		.. Bearing metals – types, composition and
19	make a fit-make a cotter jib		uses, lubricants purpose of using different
	assembly.		types, description and uses of each type
	Scrapping cylindrical taper bore,		. Hardening and tempering, purpose of each
20	check taper angle with sine bar,		method, tempering colour chart.
	check in per angle (flat) with sine
	bar.
	Preparation of centre, squares, drills		Annealing and normalising, purpose of each
	gauges.		method.
21	File and fit straight and angular
	surfaces internally Identify different
	ferrous metals by spark test
22-23	Implant training / Project work (work in a team)
24-25		Revision
26		Examination

SYLLABUS FOR WORKSHOP SCIENCE AND CALCULATION

SEMESTER-III

Week No		Workshop Science and Calculation
1	-	Revision of 1st year course.
2	-	Heat and temperature, thermometric scales their conversions.
3	-	Rectangle, square, Rhombus, parallelogram and their properties.
4	-	Circle and properties circle: regular polygons.
	-	Application of geometrical to shop problems.
5-6	-	Forces definition.
	-	Compressive, tensile, shear forces and simple problems.
7	-	Temperature measuring instruments. Specific heats of solids & liquids, quantity of
		heat.
8	-	Heat loss and heat gain, with simple problems.
9	-	Mensuration: Plain figures-triangles, square, rectangle, parallelogram.
10	-	Mensuration : Plain figures-segment and sector of circle, ellipse, fillets.
	-	Plain figures. Trapezium, regular polygons, circle, hollow circles.
11	-	Mensuration: Solid figures: Prism, cylinder, pyramid, cone.
	-	Solid figures: frustum of a cone, sphere, spherical segment.
12	-	Material weight and cost problems related to trade.
13	-	Trigonometry: trigonometric ratios, use of trigonometric table.
14	-	Area of triangle by trigonometry.
15	-	Finding height and distance by trigonometry.
16	-	Application of trigonometry in shop problems.
	-	Industrial visit.
17-18	-	Application of trigonometry in shop problems.
19-20	-	Levers-definition, types and principles of levers.
21	-	Mechanical Advantage, velocity ratio and mechanical efficiency.
22-23		Implant training / Project work (work in a team)
24-25		Revision
26		Examination

		SYLLABUS FOR ENGINEERING DRAWING
		SEMESTER-III
Week No		Engineering Drawing
1	-	Revision of first year topics.
2	-	Machined components and surface finish symbols.
3	-   Screw thread, their standard forms as per BIS, external and internal thread,
		conventions on the features for drawing as per BIS.
4	-	Sketches for bolts, nuts, screws and other screwed members.
5	-	Sketching of foundation bolts and types of washers.
6	-	Standard rivet forms as per BIS.
7	-	Riveted joints-Butt & Lap.
8-9	-	Sketches of keys, cotter and pin joints.
10-11	-	Sketches for simple pipe, unions with simple pipe line drawings.
	-   Concept of preparation of assembly drawing and detailing. Simple assemblies &
12		their details of trade related tools/job/exercises with the dimensions from the
		given sample or models.
13	-	Single Tool post for the lathe with washer and screw.
14	-	Details and assembly of Vee-blocks with clamps.
15	-	Details and assembly of Vee-blocks with clamps.
16	-	Details of assembly of shaft and pulley.
	-	Industrial visit.
17	-	Details1 of assembly of shaft and pulley.
18	-	Details of assembly of bush bearing.
19	-	Details of assembly bush bearing.
20	-	Details of assembly of a simple coupling.
21	-	Sketching of different gear wheels and nomenclature.
22-23		Implant training / Project work (work in a team)
24-25		Revision
26		Examination

	Fourth Semester
	(Semester Code no. FTR - 04)
	Duration : Six Month
Week	Trade Practical	Trade Theory
No.
01.	„H‟ fitting-	Case hardening and carburising and its
		methods, process of carburising (solid, liquid
		and gas).
02.	Exercises on lapping of gauges (hand	Solder and soldering: Introduction-types of
	lapping only)	solder and flux. Method of soldering, Hard
	Hand reams and fit taper pin, drilling	solder- Introduction, types and method of
	and reaming holes in correct location,	brazing.
	fitting dowel pins, stud, and bolts.	Production of gauges, templates and jigs. The
		objective of importance for preparing
		interchangeable components.
03.	Simple jigs and fixtures for drilling.	Drilling jig-constructional features, types and
	Prepare a „V‟ block and a clamp.	uses. Fixtures-Constructional features, types
	Marking out as per Blue print,	and uses.
	drilling, straight and curve filing.
	Threading with die, cutting slot, and
	cutting internal threads with taps,
	making an adjustable spanner.
04.	Flaring of pipes and pipe joints,	Pipes and pipe fitting- commonly used pipes.
	Cutting & Threading of pipe length.	Pipe schedule and standard sizes. Pipe bending
	Fitting of pipes as per sketch.	methods. Use of bending fixture, pipe threads-
	Conditions used for pipe work to be	Std. Pipe threads Die and Tap, pipe vices.
	followed. Bending of pipes- cold and
	hot.
05.	Practice-dismantling & assembling –	Standard pipefitting-. Methods of fitting or
	globe valves sluice valves, stop	replacing the above fitting, repairs and erection
	cocks, seat valves and non-return	on rainwater drainage pipes and house hold taps
	valve, fitting of pipes and testing for	and pipe work. Use of tools such as pipe
	leakage.	cutters, pipe wrenches, pipe dies, and tap, pipe
		bending machine etc.
06.	Practice in handling Fire	Fire precautions-causes and types of fires,
	extinguishers of different types,	precautions against out break of fire. Fire
	refilling of extinguishers.	Extinguishers-types and use.
07.	Marking detail includes male &	Working material with finished surface as
	female screw cutting, male and	aluminium, duralumin, stainless steel, the
	female fitting parts. Making and	importance of keeping the work free from rust
	tempering springs.	and corrosion. The various coatings used to
		protect metals, protection coat by heat and
		electrical deposit treatments.
		Treatments and provide a pleasing finish as
		chromium silver plating and nickel plating, and

		galvanising.
08.	Exercises on finished material as	Aluminium and its alloys. Uses, advantages and
	aluminium and stainless steel,	disadvantages, weight and strength as compared
	marking out, cutting to size, drilling	with steel.
	etc. without damage to surface of
	finished articles.
09.	Marking out for angular outlines,	Tapers on keys and cotters permissible by
	filing and fitting the inserts into gaps.	various standards. Discuss non-ferrous metals
	Making a simple drilling jig, Marking	as brass, phosphor bronze, gunmetal, copper,
	out, filing to line, drilling and tapping	aluminium etc. Their composition and purposes
	brass and copper jobs.	where and why used, advantages for specific
		purposes, surface wearing properties of bronze
		and brass.
10.	Complete exercises covering the	Power transmission elements. The object of
	assembly of parts working to detail	belts, their sizes and specifications, materials of
	and arrangement – Drawings,	which the belts are made, selection of the type
	Dismantling and mounting of pulleys.	of belts with the consideration of weather, load
	Making replacing damaged keys.	and tension methods of joining leather belts.
	Repairing damaged gears and
	mounting. Repair & replacement of	Vee belts and their advantages and
	belts.	disadvantages, Use of commercial belts,
		dressing and resin creep and slipping,
		calculation.
11.	Complete exercises covering the	Power transmissions, coupling types-flange
	assembly of parts working to details	coupling,-Hooks coupling-universal coupling
	and arrangements as per drawings.	and their different uses.
	Dismantling and mounting of pulleys.
	Making, replacing damaged keys.
	Repairing damaged gears and
	mounting them on shafts.
12.	More difficult work in marking out	Pulleys-types-solid, split and „V‟ belt pulleys,
	including tangents, templates	standard calculation for determining size
	involving use of vernier protractor.	crowning of faces-loose and fast pulleys-jockey
		pulley. Types of drives-open and cross belt
		drives. The geometrical explanation of the belt
		drivers at an angle.
13.	Fitting of dovetail slides.	Power transmission –by gears, most common
		form spur gear, set names of some essential
		parts of the set-The pitch circles, Diametral
		pitch, velocity ratio of a gear set, Helical gear,
		herring bone gears, bevel gearing, spiral bevel
		gearing, hypoid gearing, pinion and rack, worm
		gearing, velocity ration of worm gearing.
		Repair to gear teeth by building up and dovetail
		method.
14.	Male and female dovetail fitting	Method or fixing geared wheels for various
	repairs to geared teeth. Repair of	purpose drives. General cause of the wear and
	broken gear tooth by stud. Repair	tear of the toothed wheels and their remedies,
	broker gear teeth by dovetail.	method of fitting spiral gears, helical gears,
		bevel gears, worm and worm wheels in relation
		to required drive. Care and maintenance of
		gears.

15 -	Marking out on the round sections for	Lubrication and lubricants- Method of
16	geometrical shaped fittings. Finishing	lubrication. A good lubricant, viscosity of the
	and fitting to size, checking up the	lubricant, Main property of lubricant. How a
	faces for universality.	film of oil is formed in journal. Bearings,
		method of lubrication-gravity feed, force
		(pressure) feed, splash lubrication. Cutting
		lubricants and coolants: Soluble off soaps, suds-
		paraffin, soda water, common lubricating oils
		and their commercial names, selection of
		lubricants.
		Chains, wire ropes and clutches for power
		transmission. Their types and brief description.
		Discuss the various rivets shape and form of
		heads, riveting tools for drawing up the
		importance of correct head size. The spacing of
		rivets. Flash riveting, use of correct tools,
		compare hot and cold riveting.
17	Prepare different types of	Importance of Technical English terms used in
	documentation as per industrial need	industry –(in simple definition only)Technical
	by different methods of recording	forms, process charts, activity logs, in required
	information.	formats of industry, estimation, cycle time,
		productivity reports, job cards.
18	Inspection of Machine tools.	Installation, maintenance and overhaul of
&	Accuracy testing of Machine tools.	machinery and engineering equipment and
19		Hydraulics & pneumatic symbols & exercise.
		Hydraulics pneumatic circuits. Clutch: Type,
		positive clutch (straight tooth type, angular
		tooth type) .
20.	Study of power transmission system	Washers-Types and calculation of washer sizes.
	in machine tools.	The making of joints and fitting packing. The
		use of lifting appliances, extractor presses and
		their use. Practical method of obtaining
		mechanical advantage. The slings and handling
		of heavy machinery, special precautions in the
		removal and replacement of heavy parts.
21.	Simple repair of machinery, making	Foundation bolt: types (rag, Lewis cotter bolt)
	of packing gaskets, use of hollow	description of each erection tools, pulley block,
	punches, extractor ,drifts, various	crow bar, spirit level, Plumb bob, pipe 2 X 4‟,
	types of hammers and spanners, etc.	wire rope, manila rope, wooden block.

	Practicing, making various knots,
	correct loading of slings, correct and
	safe removal of parts. Erect sample
	machines.
22-23	Implant training / Project work (work in a team)
24-25		Revision
26	Examination

SYLLABUS FOR WORKSHOP SCIENCE AND CALCULATION

SEMESTER-IV

Week No		Workshop Science and Calculation
1-2	-	Centre of gravity, simple experimental determination, stable, unstable & neutral
		equilibrium, simple explanation
3	-	Friction- co-efficient of friction. Simple problem related to friction.
4	-	Magnetic substances- natural and artificial magnets.
5	-	Method of magnetisation. Use of magnets.
6	-	Electricity & its uses. Electric current-positive & negative terminals.
7	-	Use of fuses and switches, conductors and insulators.
8	-	Simple electric circuits, simple calculations.
9	-	Simple calculation based on Ohm‟s law.
	-	electrical insulating materials.
10-11	-	Transmission of power by belt, pulleys & gear drive.
	-	Calculation of Transmission of power by belt pulley and gear drive.
	-	Read images, graphs, diagrams –bar chart, pie chart.
12-13	-	Graphs: abscissa and ordinates, graphs of straight line, related to two sets of varying
		quantities.
14	-	Stress, strain, Hooks law, ultimate strength, factor of safety definitions and
		problems on them.
15-16	-	Mechanical properties of metals.
	-	Heat treatment and advantages.
17	-	Basic Electronic: Introduction to wiring symbols, units, resistor, capacitor and
		inductor.
18-21	-	Solution of NCVT test papers.
22-23		Implant training / Project work (work in a team)
24-25		Revision
26		Examination

		SYLLABUS FOR ENGINEERING DRAWING
		SEMESTER-IV
Week No		Engineering Drawing
1-2	-	Details and assembly of simple hand – vice.
3-4	-	Blue print Reading. Simple exercises related to missing lines.
5-6	-   Simple exercises relating missing symbols.
	-	Missing views
7-10	-	Simple exercises related to missing section.
11-12	-	Sketching of different types of bearings and its conventional representation.
13	-   Solution of NCVT test.
	-	Basic electrical and electronic symbols
14	-	Study of drawing & Estimation of materials.
15-16	-	Solution of NCVT test papers.
17	-	Solution of NCVT test papers.
18-21	-	Revision
22-23		Implant training / Project work (work in a team)
24-25		Revision
26		Examination