Diploma Manufacturing Technology 1 Question Papers
Dear Students
Welcome to Diploma Exam Corner, In this section you can find out the Diploma Manufacturing Technology 1 Previous Year Question paper with answer key for the February 2022 Board Examination. You can download DiplomaManufacturing Technology 1 Papers as pdf.
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Unit 1 CASTING PROCESSES
Chapter: 1.1: Patterns
Definition – pattern materials – factors for selecting pattern materials –
Types of Pattern – solid piece, split patterns, loose piece, match plate,
sweep, skeleton, segmental, shell – pattern allowances – core prints.
Chapter: 1.2: Moulding
Definition – moulding boxes, moulding sand – ingredients – silica – clay
– moisture and miscellaneous materials – properties of moulding sand –
sand additives – moulding sand preparation – moulding tools – mixing –
tempering and conditioning – types of moulding – green sand – dry sand
– machine moulding –Top and bottom squeezer machines – Jolting
machines – sand slinger- core – CO2 core making – types of core – core
boxes.
Chapter: 1.3: Casting
Definition – sand casting using green sand and dry sand – gravity die
casting – pressure die casting – hot and cold chamber processes –
centrifugal casting – continuous casting – chilled casting – malleable
casting – melting of cast iron – cupola furnace – melting of nonferrous
metals – crucible furnace melting of steel – arc furnaces – induction
furnaces – instrument for measuring temperature – optical pyrometer –
thermo electric pyrometer – cleaning of casting – tumbling, trimming,
sand and shot blasting – defects in casting – causes and remedies –
safety practices in foundry.
Unit 2 JOINING PROCESSES
Chapter: 2.1: Arc Welding
Definition – arc welding equipment – arc welding methods – carbon arc,
metal arc, Metal Inert gas (MIG), Tungsten inert gas (TIG), Atomic
hydrogen, Plasma arc, Submerged arc and Electro slag welding.
Chapter: 2.2: Gas welding
Definition Gas Welding Equipment– Oxy and acetylene welding – Three
types of flame– resistance welding – classification of resistance welding
– butt – spot – seam – projection welding – welding related processes –
oxy and acetylene cutting – arc cutting – hard facing bronze welding –
soldering and brazing special welding processes – cast iron welding –
thermit welding – solid slate welding, ultrasonic, diffusion and explosive
welding – explosive cladding – modern welding, electron beam and laser
beam welding – types of welded joints – merits and demerits of welded
joints – inspection and testing of welded joints – destructive and
nondestructive types of tests – magnetic particle test – radiographic and
ultrasonic test defects in welding – causes and remedies – safety
practices in welding .
BULK DEFORMATION PROCESSES AND HEAT TREATMENT
Chapter: 3.1: Forming
Hot working, cold working – advantages of hot working and cold
working– hot working operations – rolling, forging, smith forging, drop
forging, upset forging, press forging – roll forging Press working : Types
of presses – Mechanical and Hydraulic presses – press tool and
accessories – press working operations – bending operations – angle
bending – curling – drawing – shearing operations – blanking, piercing,
trimming – notching – lancing.
Chapter: 3.2: Heat treatment
Heat treatment processes – purpose – procedures – applications of
various heat treatment processes – Iron – carbon equilibrium diagram –
full annealing – process annealing stress relief annealing – spherodising
annealing – isothermal annealing – normalizing – hardening – tempering
– quenching medium – different types and their relative merits – case
hardening – pack carburizing – cyaniding – nitriding – induction
hardening and flame hardening.
Unit – 4 MANUFACTURING OF PLASTIC COMPONENTS AND POWDER
METALLURGY
Chapter: 4.1: Plastic Components
Types of plastics-Engineering plastics – thermosets – composite –
structural foam, elastomers – polymer alloys and liquid crystal polymers.
Chapter: 4.2: Processing of Plastics
Extrusion-general features of single screw extrusion – twin screw
extruders and types-Injection moulding types : Plunger type.-
Reciprocating screw injection – details of injection mould – structural foam
injection mould – sandwich moulding – gas injection moulding – injection
moulding of thermosetting materials calendaring and rotational moulding.
Design consideration for plastic components.
Chapter: 4.3: Powder Metallurgy
Methods of manufacturing metal powders – atomization, reduction and
electrolysis deposition – compacting – sintering – sizing – infiltration –
mechanical properties of parts made by powder metallurgy – design
rules for the power metallurgy process.
Unit – 5 CENTRE LATHE AND SPECIAL PURPOSE LATHES
Chapter: 5.1: Centre Lathe
Centre lathe: specifications – simple sketch with principal parts. Head stock: back geared type – all geared type – description only. Working
principle of tumbler gear mechanism, quick change gear box, apron
mechanism, carriage cross slide. Feed mechanism: automatic feed,
longitudinal feed and cross feed. Construction and working of tail stock.
work holding device: face plate – three jaw chuck – four jaw chuck –
catch plate and carrier – center. Operations: straight turning – step
turning – taper turning – knurling-Thread cutting – Facing – Boring –
chamfering. Cutting speed – feed – depth of cut.
Chapter: 5.2: Semi-Automatic Lathes
Types of semi-automatic lathes – capstan and turret lathes – difference
between turret and capstan.
Chapter: 5.3: Automatic Lathes
Automatic lathe – Construction and working principle of single spindle
automatic lathe – automatic screw cutting machines – multi spindle
automatic lathes.
