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1 . The raw power sent from the utility company is




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2 . The power used by equipment for useful work is




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3 . The power used by magnetizing circuits of some equipment is




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4 . The offset of current from voltage is




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5 . Select the odd




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6 . 3-phase AC lines do not use only 3 conductors.




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7 . It is easier to build circuit breakers for AC systems than DC systems




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8 . The transforming in AC substation is much easier than ???????????? in DC system




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9 . HVDC is less reliable and has lower availability due to




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10 .

In single phase AC circuits Active Power, P =






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11 .

In single phase AC circuits Reactive Power, Q =






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12 . In some cases, the receiving end voltage can be found to be higher than the sending end voltage according to ?????????????????????? effect.




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13 . A high power factor reduces the current ?owing in a supply system.




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14 . Power factor will be improved if the phase angle between current and voltage is




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15 . Skin effect reduces the effective ????????? of a conductor




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16 . Which is more affected by skin effect?




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17 . Corona effect is due to dielectric stress on




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18 .

In 3-phase AC circuits using line values, Active Power, P =






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19 .

In 3-phase AC circuits using phase values, Active Power, P =






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20 . The ratio of resistance to impedance is




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21 . Voltages are stepped up or down at the




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22 . Routes leading to transmission line structures for both line construction and maintenance are known as




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23 . The reactance of the lines affects the voltage regulation in an AC system.




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24 . two extreme condition used to determine the ABCD parameters of a transmission line




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25 . Capacitors ??... reactive power.




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26 . Inductors ??... reactive power.




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27 . Power factor can be improved by the use of




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28 . This phenomena of electrical discharge occurring in transmission line for high values of voltage is known as




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29 . Skin effect reduces the effective ????????? of a conductor




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30 .

In a purely inductive circuit, the voltage leads the current by 90 degrees.






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31 .

In a purely capacitive circuit, the voltage does not leads the current by 90 degrees






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32 .

In a purely resistive circuit, the voltage leads the current by 0 degrees






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33 . For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, Is is approximately Ir. YES/ NO




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34 .

For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, the vertical component of Vr is






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35 .

For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, the horizontal component of Vr is






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36 .

For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, the vertical component of Vs is






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37 .

For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, the horizontal component of Vs is






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38 . For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, ???.leads the current by 90 degrees




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39 . For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, is the receiving end phase angle approximately the sending end phase angle? YES/ NO




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40 . For a short transmission line where Vs is the sending end voltage, Vr the receiving end voltage, and Is and Ir are the sending end and receiving end currents respectively, Which is in phase with Ir.




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