200+ câu Trắc nghiệm Tiếng Anh chuyên ngành kỹ thuật điện có đáp án - Phần 8

Since most of the ......... is provided by air, overhead power lines are generally the lowest-cost method of power transmission for large quantities of electric energy.

Primary of a ........... is connected in serieswith the power circuit.

Electric generators transform kinetic energy(động năng) into electricity.

........... is a device designed to detect the faults in the power system.

............... are used to "transform" voltage from one level to another.

If all of the plant's main generators are shut down, station service power is supplied by drawing power from the .... through the plant's transmission line.

In switching substation, there is not any .......

Where a substation has a metallic fence, it must be properly ........ , to protect people from this hazard.

The instantaneous values of a sinusoidal waveform is given by the formula :

The symbol of electric currentis

the current in a wire………….

In ............, voltage is changed for transmission and distribution.

“The sum of I one, I two, and I three equals I four” is the full expression of

Write out V 1 = V 2 + V 3 in full

one kilowatt hour of electrical energy is the same as……..

The electric power which ...... is stepped up to a higher voltage at which it connects to the transmission grid.

The unit of the reactive poweris

Write out R 2 + 15Ω = R 1 in full

Write out V 2 + V 3 = V 1 in full

Generation of ...... is a process whereby electrical energy is obtained from some other form of energy