Air conditioning processes
state the psychometric properties of air.
explain air conditioning processes: heating, cooling, humidification, air cleaning and filtering.
differentiate between latent heat and sensible heat, saturated air
read property diagram.
International practical temperature and pressure values
list the acceptable international practical values of temperature and pressure for oxygen and water;
state uses of suction and high pressure gauges;
use suction and high pressure gauges to determine the performance of refrigerants in the refrigeration
system.
Power
explain the meaning of power and state its unit
calculate power used by a compressor
Energy
define heat energy.
explain the meaning of enthalpy in fluid, and its relationship with pressure, volume, and temperature as well as internal energy;
draw and explain the p.h diagram ofrefricerant
Servicing an air conditioner
List five basic tools and state their uses.
Basic Tools used in Refrigeration and Air conditioning System
identify, select and use basic tools in refrigeration and air- conditioning work.
Evaporators
state the types, function of evaporators.
describe the construction of evaporators.
explain the working principles of evaporator.
Compressors
state the types, and functions of reciprocating, rotaryand screws centrifugal compressors etc.
describe the construction of com pressors.
explain the basic working of compressors.
Refridgerants
define refrigerant
identify the different types of refrigerants using the colour code.
state the properties and uses of refrigerants.
state the chemical name and formulae of refrigerants e.g organic, hydrocarbons, mixtures, secondary etc
Introduction to Refridgeration
describe the refrigeration cycle.
draw layout diagrams of a basic refrigeration systems example: fridge.
Temperature and pressure
state the effects of temperature, pressure and volume on refrigeration and air-conditioning system.
state Gas laws, Boyies law, Charles law and Dalton law.
demonstrate calculations involving gas law formulae.
Pressure and its Measurement
explain the concept of pressure.
state the units of measuring pressure.
describe different types of pressure measuring devices.
measure pressure using appropriate measuring instrument
Temperature and its Measurement
define temperature.
state the units of measuring temperature.
describe the different types of thermometers.
convert one temperature scale to another.
Nature of Matter
define matter
list the state of matter.
explain the process of changing matter from one state to another.
Energy
define energy state the different types of energy.
explain the processes of energy conversion.
First Aid
list first aid materials.
apply the materials in administering first aid on accident victims.
Safety in the Workshop
state workshop rules and regulations
identify safety devices and equipment
dress properly to the workshop
,observeworkshop rules
state some accident prevention measures.
Agricultural Extension
At the end of this lesson, the students should be able to understand Agricultural Extension
Farm Records And Account (V)
At the end of the lesson, the student should be able to understand more on Farm Records And Account
Farm Records And Account (II)
At the end of the lesson, the student should be able to understand more on Farm Records And Account