mechanical supervisor|Nepal Electricity Authority | NEA | leVEl 5 |Engineering Ebook , Notes ,Project report

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1. General

· Types of hydropower and thermal power stations

· General layout of hydro power stations

· Advantages and disadvantages of hydro and thermal power stations

· Importance of safety rules. Safety tools and devices.

· Fire fighting equipments. Application of DCP, CO2, Chemical Foam in firefighting

· Types of Gates, hoist & their applications

2. Fundamentals

· Physical properties of metal and Difference between carbon steel and cast iron

· Heat treatment and their effect in properties of metal

· First and second law of thermodynamics

· Basics of free and forced vibrations, Vibration damping

· Load factor, plant Availability and Reliability of a power station.

· Current, voltage, frequency, power, power factor and energy

· Importance of earthing of electrical equipments.

3. Hydraulics, Hydraulic machines, I.C.Engines & auxiliaries

Types of hydro turbines and their selection with respect to Head
Basics of compressible & non compressible flow, friction loss due to sudden enlargement & contraction
Functions of turbine runner, wearing ring, guide vanes, nozzles, needle, deflector and deflector servomotor, BF Valve
Different types of pumps & their application
Types of compressors and their use
Types of bearing and their applications
Operating principle of IC Engine. Two stroke & Four stroke Engines
Diesel & Petrol engine. Their respective advantages & disadvantage
Power train system of automobile & construction equipments
Working principle of Hydraulic system, brakes in automotive & construction equipments
Turbochargers, Heat Exchangers, Cooling Towers, Separators, Purifiers & filters
Types of fuel, Lubricating Oil and their properties
Quality of Cooling Water, Chemical treatment of cooling water

4. Workshop Practice

Different Types of measuring tools & equipments
Types of welding & their application
Principle of arc welding, oxy-acetylene welding, their advantages and limitations
Welding equipments, tools and accessories, safety precautions in welding
Types of electrodes, application & care
Welding defects, causes, remedies and testing of welding defects
Types of machine tools & equipments used in Mechanical work shop
Uses of fits and tolerances
Types of Non-destructive testing

5. Operation and Maintenance

Operation and Maintenance planning, Concept of various maintenance system
General operational rule, assignment, duties and communication, Supervision, inspection & recording
Pre-requisite for starting of generator in a hydro & thermal power station
Role of governors in hydro as well as thermal power station, speed droop & other parameters of a governor
Importance of air conditioning and ventilation
Condition monitoring
Cavitations, wear & pitting of runner and other parts and their remedy
Corrosion, its effects & protective measures
Trouble shooting in power plants

6. INSTITUTIONAL KNOW-HOW

· General knowledge of Nepal Electricity Authority, its organizational structure and function of various business groups

· General knowledge of various power plants of Nepal, their types, salient features, and their geographical locations

· General knowledge on Nepalese power transmission system, voltage levels and lengths.

Engineering Ebook , Notes ,Project report