In transformer, bushing failure occurs due to<br/>(i) transformer vibrations<br/>(ii) dielectric losses<br/>(ii) partial discharge

MGVCL Exam Paper (30-07-2021 Shift 2)
In transformer, bushing failure occurs due to
(i) transformer vibrations
(ii) dielectric losses
(ii) partial discharge

(i) and (ii) only

(ii) and (iii) only

(i) and (iii) only

(i), (ii) and (iii)

(i) and (ii) only

(ii) and (iii) only

(i) and (iii) only

(i), (ii) and (iii)

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MGVCL Exam Paper (30-07-2021 Shift 2)
જે ક્રિયા દર્શાવે પણ વાક્યનો અર્થ પૂર્ણ કરે એ એને ____કહેવાય. - આપેલ વિકલ્પોમાંથી યોગ્યનું ચયન કરી વાક્ય પૂર્ણ કરો

વિભક્તિ

કૃદંત

ક્રિયા-વિભક્તિ

નીપાત

વિભક્તિ

કૃદંત

ક્રિયા-વિભક્તિ

નીપાત

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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

(IRcosφ_r + IXsinφ_r)/V_r

(IXcosφ_r + IRsinφ_r)/V_r

(IXcosφ_r - IRsinφ_r)/V_r

(IRcosφ_r - IXsinφ_r)/V_r

(IRcosφ_r + IXsinφ_r)/V_r

(IXcosφ_r + IRsinφ_r)/V_r

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MGVCL Exam Paper (30-07-2021 Shift 2)
Operating system is

a layer between the user and the hardware

a program that runs for short duration

a program that runs during log off

a layer between the user and the hardware

a program that runs for short duration

a program that runs during log off

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MGVCL Exam Paper (30-07-2021 Shift 2)
A generating station having 'n' section busbars each rated at Q kVA with ×% reactance is connected on the tie-bars systems through busbar reactances of b%. Determine the short circuit kVA if a 3-phase fault takes place on one section.

Q[(1/x) + (n+1)/(bn+x)]

Q[(1/x) + (n-1)/(bn+x)]

Q[(1/x) - (n+1)/(bn-x)]

Q[(1/x) + (n+1)/(bn-x)]

Q[(1/x) + (n+1)/(bn+x)]

Q[(1/x) + (n-1)/(bn+x)]

Q[(1/x) - (n+1)/(bn-x)]

Q[(1/x) + (n+1)/(bn-x)]

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MGVCL Exam Paper (30-07-2021 Shift 2)
The magnitude of the generator earth-fault current is limited by

controlling field exciter

inserting the stabilizing resistance in series with the relay

inserting suitable resistance in neutral grounding circuit

using higher rating CTs

controlling field exciter

inserting the stabilizing resistance in series with the relay

inserting suitable resistance in neutral grounding circuit

using higher rating CTs

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MGVCL Exam Paper (30-07-2021 Shift 2)

MGVCL Exam Paper (30-07-2021 Shift 2) In transformer, bushing failure occurs due to(i) transformer vibrations(ii) dielectric losses(ii) partial discharge

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.

MGVCL Exam Paper (30-07-2021 Shift 2) Operating system is

MGVCL Exam Paper (30-07-2021 Shift 2) A generating station having 'n' section busbars each rated at Q kVA with ×% reactance is connected on the tie-bars systems through busbar reactances of b%. Determine the short circuit kVA if a 3-phase fault takes place on one section.

MGVCL Exam Paper (30-07-2021 Shift 2) The magnitude of the generator earth-fault current is limited by

MGVCL Exam Paper (30-07-2021 Shift 2)
In transformer, bushing failure occurs due to
(i) transformer vibrations
(ii) dielectric losses
(ii) partial discharge

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.

MGVCL Exam Paper (30-07-2021 Shift 2)
Operating system is

MGVCL Exam Paper (30-07-2021 Shift 2)
A generating station having 'n' section busbars each rated at Q kVA with ×% reactance is connected on the tie-bars systems through busbar reactances of b%. Determine the short circuit kVA if a 3-phase fault takes place on one section.

MGVCL Exam Paper (30-07-2021 Shift 2)
The magnitude of the generator earth-fault current is limited by