MGVCL Exam Paper (30-07-2021 Shift 2)
The wind speed increases with height because of

reduction in the gravitational force
enhancement of drag effect on the earth surface
reduction of drag effect of the earth surface
reduction in lift effect of the air

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MGVCL Exam Paper (30-07-2021 Shift 2)
A single phase motor connected to 415 V, 50 Hz supply takes 30 A at a power factor of 0.7 lagging. Calculate the capacitance required in parallel with the motor to raise the power factor to 0.9 lagging.

96.32 µF
76.32 µF
66.32 µF
86.32 µF

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MGVCL Exam Paper (30-07-2021 Shift 2)
The necessary equation to be solved during the load flow analysis using Fast-Decoupled method is given below:
where B' and B'' are formed using the imaginary part of the bus admittance matrix, Ybus. If the system consists of 6 buses of which one of the bus is slack bus and 2 bues are voltage regulated buses, then then the matrix B' is of order ____and the matrix B'' is of order____, respectivity.
∆P/|Vi| = - B'∆δ
∆Q/|Vi| = - B''∆|V|

6 and 3
3 and 6
3 and 5
5 and 3

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MGVCL Exam Paper (30-07-2021 Shift 2)
Interposing current-transformer (CT) is used in differential protection of a transformer to

limit the main CT secondary current
increase the sensitivity of the relay
minimize the effect of saturation of the main CTs
match the standard ratio of CTs used on both sides of the transformer winding

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MGVCL Exam Paper (30-07-2021 Shift 2)
નીચે માંથી ક્યાં રુઢિપ્રયોગનો અર્થ 'છેતરવું' એવો થાય

હથેળીમાં ચાંદ દેખાડવો
દસ મારવો
આડા ઉતરવું
બે પાંદડે થવું

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