Electrical Power Engineering Interview Questions and Answers

Power Plants Economics Interview Questions and Answers: 1. State factors on which generating cost depends. Ans. The generating cost per unit (kWh) of energy depends upon the cost covering the purchase, installation and erection of equipment, cost of fuel, labour, repair etc. 2. What items constitute the fixed and running charges of generation of electrical […]

Interconnected Systems Interview Questions and Answers: 1. Why are alternators put in parallel ? Ans. For high efficiency of operation, reliability, convenience and economy in maintenance and repair and possibility of additions to plant capacity with the growth in load on the power station. 2. What is meant by synchronizing of alternators ? Ans. The

Cogeneration and Energy Conservation Interview Questions and Answers: 1. What do you mean by word ‘cogeneration’ ? Ans. Cogeneration is sequential of energy contained in fuel into two or more usable forms. In one manifestation coal is burnt in the boiler to generate steam. The steam so gener­ated provides heat for manufacturing process in addition

Environmental aspects of Electric Energy Generation Interview Questions and Answers: 1. Name various stack emissions. Ans. Thermal power plants using fossil fuels emit large amount of harmful gases such as SO2, nitrogen oxides (NOx), CO, CO2, certain hydrocarbons and particulates. 2. What are particulates ? What are their harmful effects ? Ans. Particulates are small particles

Combined Operation of Power Plants Interview Questions and Answers: 1. Why is it necessary to operate hydro and steam plants in combination ? Ans. It is necessary to operate hydro and steam plants in combination because such a combination provides (i) flexibility of operation, (ii) reliability of power supply, (iii) reduced reserve capacity, (iv) better

Economic Operation of Power Plants Interview Questions and Answers: 1. Is the cost of fuel directly proportional to power output ? Ans. No, the cost of fuel does not vary directly in proportion to the power output. It is directly proportional to the power output plus the losses in the conversion process. 2. What is

Selection of Power Plant Interview Questions and Answers: 1. Why are diesel power plants rarely used ? Ans. Diesel power plants have limited field of application as emergency power plants in private industries and other installations to supply power for short intervals in the event of failure of power supply from grid. This is because

Non Conventional Methods of Power Generation Interview Questions and Answers: 1. What are renewable and non-renewable energy resources ? Ans. Renewable energy resources are those resources which can be used to produce energy again and again e.g., hydro energy, solar energy, tidal energy, geothermal energy etc. Non-renewable energy resources are those sources which cannot be

Turbine Power Plants Interview Questions and Answers: 1. What for a starting motor is required in a gas turbine power plant ? Ans. An electric motor is required for starting the compressor, which is required to be started before starting of turbine. 2. Why are majority of gas turbine power plants employed as peak load

Diesel Electric Power Plants Interview Questions and Answers: 1. What is the basic difference between a diesel engine and steam turbine ? Ans. The basic difference between a diesel engine and a steam turbine is that in the first case the chemical energy of combustion is released inside the cylinder whereas in the second case