MGVCL Exam Paper (30-07-2021 Shift 3) In which of the following situations, there is no need to provide directional overcurrent protection. ring main double end fed, single feeder single end fed, parallel feeder single end fed, single feeder ring main double end fed, single feeder single end fed, parallel feeder single end fed, single feeder ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Directional overcurrent relay protection is used for parallel feeder and ring main system.It is not used for the protection of radial system.
MGVCL Exam Paper (30-07-2021 Shift 3) Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 400 W and -50 W. Calculate the reactive power taken by the load 350√3 VAR 450√3 VAR 350/√3 VAR 450/√3 VAR 350√3 VAR 450√3 VAR 350/√3 VAR 450/√3 VAR ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Reactive power taken (Q) = √3*(W1 - W2)= √3*(450 + 50)= √3*450 kVAR
MGVCL Exam Paper (30-07-2021 Shift 3) The current in the coil of a large electromagnet falls from 6 A to 2 A in 10 ms. The induced emf across the coil is 100 V. Find the self-inductance of the coil. 0.5 H 1.25 H 0.75 H 0.25 H 0.5 H 1.25 H 0.75 H 0.25 H ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Equation of self inductance:V = Ls*(di/dt)Ls = V/(di/dt)= 100/((6 - 2)/(0.01))= 0.250 H= 250 mH
MGVCL Exam Paper (30-07-2021 Shift 3) Find the word which is correctly spelt from the given options. Dimnished Profitable Clasification Idantical Dimnished Profitable Clasification Idantical ANSWER DOWNLOAD EXAMIANS APP
MGVCL Exam Paper (30-07-2021 Shift 3) કામકાજમાં ધ્યાન કન્દ્રિત કરજો'.આ આજ્ઞાર્થ વાક્યની સંભાવનાર્થ વાક્યરચના કઈ હોઈ શકે? કામકાજમાં ધ્યાન કેન્દ્રિત કરી લીધું છે. હવે તો તમે કામકાજમાં ધ્યાન કેન્દ્રિત કરો. કામકાજમાં ધ્યાન કેન્દ્રિત નથી કરવું? હવે તો કામકાજમાં ધ્યાન કેન્દ્રિત કરશો ને? કામકાજમાં ધ્યાન કેન્દ્રિત કરી લીધું છે. હવે તો તમે કામકાજમાં ધ્યાન કેન્દ્રિત કરો. કામકાજમાં ધ્યાન કેન્દ્રિત નથી કરવું? હવે તો કામકાજમાં ધ્યાન કેન્દ્રિત કરશો ને? ANSWER DOWNLOAD EXAMIANS APP
MGVCL Exam Paper (30-07-2021 Shift 3) In a series RLC circuit, the supply voltage is 230 V at 50 Hz. The resonant current is 2 A at the resonant frequency of 50 Hz. Under the resonant condition, the voltage across the capacitor is measured to be equal to 460 V. What are the values of L and C? 0.53 mH and 15.83 pF 0.73 H and 13.85 pF 0.73 mH and 13.85 pF 0.53 H and 15.83 pF 0.53 mH and 15.83 pF 0.73 H and 13.85 pF 0.73 mH and 13.85 pF 0.53 H and 15.83 pF ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Vc = I*Xc460 = 2*(1/(2*ᴨ*50*C))C = 2/(460*2*50*ᴨ)= 1.385*10⁻⁵ F= 13.85 FV_L = I*X_LL = V/(I*2*ᴨ*f)= 460/(2*ᴨ*50*2)= 0.7345 H
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