MGVCL Exam Paper (30-07-2021 Shift 2)
In a 3-phase, 4-wire, 400/230 V system, a lamp (L1) of 100 W is connected to one phase and neutral and a lamp (L2) of 150 W is connected to the second pahse and neutral. If the neutral wire is disconnected accidently, then

100 W lamp (L1) becomes brighter and 150 W lamp (L2) becomes dim
100 W lamp (L1) becomes dim and 150 W lamp (L2) becomes brighter
both 100 W lamp (L1) and 150 W lamp (L2) becomes dim
both 100 W lamp (L1) and 150 W lamp (L2) becomes brighter

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MGVCL Exam Paper (30-07-2021 Shift 2)
If no load is connected to solar PV system,

it will stop absorbing light
it will start reflecting the light
it will dissipate energy in the panel and increase its temperature
its voltage will go on increasing till its breakdown

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which of the following does the term 'feeder automation' include?

All of these
substation reactive power control
automatic reclosing
feeder remote point voltage control

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MGVCL Exam Paper (30-07-2021 Shift 2)
The expression for voltage regulation of a short transmission line for leading power factor is given by: ____, where, 'I' is the line current, 'V_r' is the receiving end voltage, 'R' is the line resitance and 'X' is the line reactance.

(IXcosφ_r + IRsinφ_r)/V_r
(IRcosφ_r + IXsinφ_r)/V_r
(IXcosφ_r - IRsinφ_r)/V_r
(IRcosφ_r - IXsinφ_r)/V_r

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