MGVCL Exam Paper (30-07-2021 Shift 1) Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___ Turns ratio values Movement of the windings (change in capacitance) Whether the oil test indicates moisture Condition of paper insulation (change in watts losses) Turns ratio values Movement of the windings (change in capacitance) Whether the oil test indicates moisture Condition of paper insulation (change in watts losses) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A form of AC testing that applies voltage and measures the leakage/loss current of electrical insulation.It is a type of insulation testing used to evaluate the integrity of electrical insulation.
MGVCL Exam Paper (30-07-2021 Shift 1) Murray loop test is performed on a faulty cable 300 m long. At balance, the resistance connected to the faulty core was set at 15 Ω and the resistance of the resistor connected to the sound core was 45 Ω. Calculate the distance of the fault point from the test end. 75 m 150 m 225 m 450 m 75 m 150 m 225 m 450 m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Where,R2 is the resistance connected to the faulty core in ohmR2 is the resistance of the resistor connected to the sound core in ohmR1 Distance of fault location (Lx) = R2/(R1 + R2)*(2*L)= (15/60)*600= 150 m
MGVCL Exam Paper (30-07-2021 Shift 1) A fully controlled natural commutated 3-phase bridge rectifier is operating with a firing angle α = 30°, The peak to peak voltage ripple expressed as a ratio of the peak output dc voltage at the output of the converter bridge is 1-(√3/2) 0.5 √3 -1 √3-1 1-(√3/2) 0.5 √3 -1 √3-1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Where,φ is firing angleVoltage ripple for 3-phase bridge rectifier = cos(φ) = Cos(30)= 1/2
MGVCL Exam Paper (30-07-2021 Shift 1) Which of the following are the advantages of Aerial Bunched Cables (ABC)? Elimination of theft of energy Higher safety and reliability All of these Reduced height of supports Elimination of theft of energy Higher safety and reliability All of these Reduced height of supports ANSWER DOWNLOAD EXAMIANS APP
MGVCL Exam Paper (30-07-2021 Shift 1) Who has won the ‘World Games Athlete Of the Year 2019’ ? Rani Rampal Rhea Stinn Stanislav Horuna Marina Chernova Rani Rampal Rhea Stinn Stanislav Horuna Marina Chernova ANSWER DOWNLOAD EXAMIANS APP
MGVCL Exam Paper (30-07-2021 Shift 1) Dena Bank and Vijaya Bank recenlty got merged with which of the following banks? Punjab National Bank Bank of Baroda Indian Overseas Bank State Bank of India Punjab National Bank Bank of Baroda Indian Overseas Bank State Bank of India ANSWER DOWNLOAD EXAMIANS APP
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