Madanswer Technologies Interview Questions Data|Agile|DevOPs|Python - Recent questions and answers in Power System

Answered: Read the following statements:

Fri, 11 Nov 2022 14:58:14 +0000

B. Only II is correct

To supply base load the operation cost should be minimum, but Diesel power plant has very high operating cost. Diesel power plants are best suitable to supply peak loads. Gas turbine can be started in less time and so it is suitable to supply peak loads.

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Answered: Thermal power plants are not suitable for supplying base peak loads.

Fri, 11 Nov 2022 14:56:24 +0000

A. True

To operate as peak load plant, a power plant must be able to meet sudden variation of load. The major drawback of a steam power plant is that it requires appreciable time to start up, synchronize and take up load. Hence thermal power plant is not suitable to work as peak load plant.

Answered: Which of the following system is more reliable?

Fri, 11 Nov 2022 14:55:40 +0000

C. Combined operating steam and hydroelectric power plant

The reliability of steam power plant depends upon the coal supply, that of hydroelectric power plant on stream flow. Due to greater diversity a combine operation of various types of power plant would be more reliable than individual steam or hydro power plant.

Answered: Gas turbine power plants are most suitable for which of the following loads?

Fri, 11 Nov 2022 14:54:57 +0000

B. Only Peak load

Gas turbine power plants have advantage of low initial cost and low startup time. So, it is ideally suited for supplying peak loads.

Answered: Plants with maximum operating costs are put on load for :

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C. Emergency conditions

Power plants with minimum operating cost are put on load for maximum time. Plants with medium operating cost are only loaded when required by the load demand on the system. Plants with maximum operating cost are kept in reserve and would operate only in emergency.

Answered: Plants with higher operating cost and greater flexibility are suitable for?

Fri, 11 Nov 2022 14:53:49 +0000

B. Only Peak load

Plants which can meet sudden variation of load demand are said to have higher flexibility. Plants with higher operating cost can’t be used as base load plants. Plants with such capabilities are most suitable for peak load plants as they can respond immediately.

Answered: Which of the following power plants can be profitably employed for supplying base loads as well as peak loads?

Fri, 11 Nov 2022 14:53:10 +0000

C. Hydroelectric power plant

Seam and Nuclear power plants are only used to supply base load. Diesel power plants are suitable for only peak load. Only hydroelectric power plant can supply both peak load as well as base load because of its flexibility in operation and low operating cost.

Answered: Which of the following power plant are put on load for maximum time?

Fri, 11 Nov 2022 14:52:38 +0000

A. Plant with minimum operating cost

The power plants with minimum operating cost are put on load for maximum time. Plants with medium operating cost are only loaded when required by the load demand on the system. Plants with maximum operating cost are kept in reserve and would operate only in emergency.

Answered: In combined operation of several power plants the reserve capacity requirement is reduced.

Fri, 11 Nov 2022 14:50:10 +0000

a) True

Answered: In impedance diagram different power system elements are represented by symbols.

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b) False

Answered: Single line diagram does not represents

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a) Neutral wire of transmission lines

Answered: Single line diagram of which of the following power system is possible?

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a) Balanced power system

Answered: A 200 bus power system has 160 PQ bus. For achieving a load flow solution by N-R in polar coordinates, the minimum number of simultaneous equation to be solved is ___________?

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Total number of equation = (40-1)*1 + (160*2) = 359

Answered: For a given power system, its zero and maximum regulation will occur at the impedance angle of

Fri, 11 Nov 2022 14:47:50 +0000

c) 45

Answered: A power system will have greater flexibility of operation if they have __________.

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d) Various types of power plants operating in combination