METAL WORK SS 2 THIRD TERM

• 
  Definition of heat treatment,
  

1. 
   Heat treatment process
   
2. 
   Annealing
   

(iv) Hardening

Case Hardening

5. 
   Tempering etc.
   

should state the important of heat –treatment of metals

should explain heat –treatment in terms of changing the grain structure of the metal in order to refine its grain.

Heating temperature and the mode of heating and quenching should be very important depend on the type of heat-treatment.

• 
  Materials and equipment for heat-treatment,
  
• 
  Materials:- Coal, brine, water, air, oil etc
  
• 
  Equipment:- Furnace, pyrometers, oven, quenching talks. etc
  

• 
  Explains the function and equipment used for heat-treatments
  
• 
  State the coaling and heating equipment and how they are used.
  

• 
  Forging,
  
• 
  Definition of forging
  
• 
  Importance of forging
  
• 
  Method of forging
  

1. 
   Hand forging
   
2. 
   Drop forging
   
3. 
   Machine forging
   

State types of forging and important of forging metals work shape.

• 
  Hand equipment,
  
• 
  A Equipments
  

1. 
   Forge
   
2. 
   The anvil
   
3. 
   The Vice
   
4. 
   Swage
   

1. 
   Hammers
   
2. 
   Tongs
   
3. 
   Cold set and Hardies
   
4. 
   Hot set and hardies
   

-Use tong to hold the hot metals to the vice or anvil and ask student to hammer the piece of metal to shape.

• 
  Hand forging operations,
  

Drawing down

Setting down

Bending

List at least 4 types of forging operation and explain two

Demonstrates various forging operations organize a visits local black smith work shop. For sites seeing.

(i)power hack saws

(ii)Horizontal band saws

-Definition of stick cutoh machine

-Four kinds of stick cutoh machines

(i)power Hack saws

(ii)Horizontal band saws cold saws Abrasive cutoh saws.

List tools and machines for power sawing

Basic cutting operations

-size of lathes and their functions .

(i)Turret lathe

(ii)capstan lathe.

Describe the at lest four operations carried out in the lathe

-state at last 7 safety precautions e.g. turning and falling .

Cutting tools and tools holders cutting speed for the lath.

Explains cutting speed and solve the problem on the cutting speed.

-Quick – return machine

-cutting speed

-work holding

-tools and tolls holding

State various operation performed on the milling machine such milling, climb milling, ends milling and milling.

-Definition

-Basic milling operation

-classification of the milling machine and their main ports.

Milling cutter,

Direction of rotation and feed work holding.

Explain the in term index and use the formula for the gear calculation.

Universal head indexing

-Concept of electricity generation

-Types of generating station

-Principles of operation

. Hydro-power station

-Advantages and disadvantages of hydro-power generation.

-Principles of operation of;

.Gas power station

.Steam power station

.Thermal power station

-Advantages and disadvantages of the types of power station.

-Concept of transmission of electricity

-Method of transmission of electricity

-Differences between the short and medium transmission lines.

-Components of transmission system

--Function of components of transmission system.

-General layout for transmission of electric power.

-Basic concept of electricity distribution

-Layout and main components of electricity distribution

-Function of sub-station, transformers, distributors, and feeders.

Field trip

Induced EMF

Definition of DC generator

Principles of operation and main parts of DC generator

Calculation of generated voltage and output voltage.

Types of DC generators.

-Methods of connection of DC generators

-Differences between series, shunt and compound DC -generators.

-Uses of DC generators.

-Principles of AC generator

-Description of the constructional features of AC generator.

-Characteristics of AC generator.

-Application of AC generator.

-Definition of AC motors.

-Principles of operating AC motors.

-Description of main features of AC motor.

-Types of AC motors

-Differences between single and three phase motors.

Domestic and industrial application of AC motors.

-Identification of electrical measuring instruments.

Operational range of measuring instruments.

-Conversion of moving coil instrument into ammeter.

-Conversion of moving coil instrument into voltmeter.

Measurement of various electrical quantities using the measuring instruments.

-Identification of sources of errors in electrical measuring instruments.

-Reduction of electrical instruments errors.

Measurement of electrical quantities with electrical instruments with minimal errors.

-I.E.E regulation.

-Application of I.E.E regulation.

-Identification of hand tools.

-Identification of testing instruments.

-Application of tools and testing instruments.

Types of wiring; surface, conduit, trunking, ducting etc

-Identification of lighting points

-Identification of control switches.

-Preparation of cable ends.

-Method of termination of cables.

-Types of conduit materials.

-Classification of conduit materials.

-Application of conduit materials.

-Types of conduit fittings.

-Classification of conduit fittings.

-Application conduit fittings.

Conduit practical work; making out, preparing the conduit, termination, fixing, and drawing cables into conduit.

-Types of trunking and ducting

-Types of trunking and ducting fittings.

-Area of application of trunking and ducting.

-Layout diagram of radial circuit, ring circuit, final sub circuit, and spur.

-Areas of application.

-Types of maintenance; preventive and corrective.

-General preventive maintenance of electrical appliances.

-Trouble-shooting; faults and remedy.