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MGVCL Exam Paper (30-07-2021 Shift 1)

MGVCL Exam Paper (30-07-2021 Shift 1)
જ્વાળા: ધુમાડો:: બરફ : ___

બાષ્પ
ગરમી
તાપમાન
શીતળતા

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MGVCL Exam Paper (30-07-2021 Shift 1)
A transformer designed for operation at 60 Hz supply is working at 50 Hz supply system without changing its voltage and current ratings. Compared to the full load efficiency at 60 Hz, the full load transformer efficiency at 50 Hz.

decreases marginally
remains unaltered
increases by 30%
increases marginally

ANSWER DOWNLOAD EXAMIANS APP

MGVCL Exam Paper (30-07-2021 Shift 1)
An alternator is supplying load of 300 kW at a power factor of 0.5 lagging. If the power factor is raised to unity, how many more kilowatts can alternator supply for the same kVA loading?

300 kW
450 kW
150 kW
600 kW

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

P = S*cosφ
S = P/cosφ
S = 300/0.5
S = 600 kVA
For same kVA rating and unity power factor,
P = 600*1
P = 600 kW
Pextra = 600 - 300
Pextra = 300 kW

MGVCL Exam Paper (30-07-2021 Shift 1)
The Prime Minister Rozgar Yojana (PMRY) was launched in which year?

1995
1993
2005
2003

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MGVCL Exam Paper (30-07-2021 Shift 1)
Rearrange the following to form a meaningful sentence and find the most logical order from the given options.

P: 60 countries using dance as a tool for
Q: building social cohesion and resolving
R: conflict throughout the world
S: battery Dance has travelled far and wide across

PQRS
PQSR
SPRQ
SPQR

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MGVCL Exam Paper (30-07-2021 Shift 1)
An eight-pole wave-connected armature has 600 conductors and is driven at 625 rev/min. If the flux per pole is 20 mWb, determine the generated emf.

325 V
500 V
125 V
250 V

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let,
E→EMF in volt
φ→Flux in weber
A→Parallel path (for wave winding = 2)
Z→No. of armature conductors
N→speed in rpm
P = Number of poles
E = PφNZ/(60A)
E = 8*0.020*625/(60*2)
E = 500 V

MORE MCQ ON MGVCL Exam Paper (30-07-2021 Shift 1)

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