Dual Converters-3 Online Exam Quiz
Dual Converters-3 GK Quiz. Question and Answers related to Dual Converters-3. MCQ (Multiple Choice Questions with answers about Dual Converters-3
A protection system engineer is planning to provide the complete protection, he can achieve this by ___
Options
A : three phase fault relays and two earth fault relays
B : two phase fault relays and three earth fault relays
C : a two phase fault relays and three earth fault relays
D : a two phase fault relays and two earth fault relays
If the specified fault setting for a winding is mentioned as 20%, then what can be inferred about it?
Options
A : If a terminal fault has its current limited to the full load rating, then 20% of winding from neutral end will be unprotected
B : If a terminal fault has its current limited to the full load rating, then 80% of winding from neutral end will carry current
C : If a terminal fault has its voltage limited to the full load rating, then 20% of winding from neutral end will be unprotected
D : Any of the mentioned
If V1 and V2 are the converter output voltages then the reactor voltage is
Options
A : V1 + V2
B : V1 ? V2
C : V1 x V2
D : none of the mentioned
In the below given figure the converter 1 (to the right side) has firing angle = ?1, converter 2 has firing angle = ?2. For the dual converter to operate in the second quadrant.^
Options
A : ?1 > 90?
B : ?2 > 90?
C : ?1 < 90?>>>>> b) ?2 < 90?
D : -
In the below given figure, the converter 1 (to the right side) has firing angle = ?1, converter 2 has firing angle = ?2. For the dual converter to operate in the fourth quadrant.^
Options
A : ?1 > 90?
B : ?2 > 90?
C : ?1 < 90?>>>>> b) ?2 < 90?
D : -
The given figure shows protection system scheme for one phase of generator. A high resistance fault occurs near the neutral end with the current distribution as marked. The slope of the relay is 10% and pick-up current of 0.15A.^ The CT ratio is 500/5.^ Will the relay operate under given circumstances?
Options
A : TRUE
B : FALSE
C : -
D : -
The reactor is required in a circulating current type dual converter to
Options
A : improve the power factor
B : smooth-en the waveform of circulating current
C : limit the circulating current
D : increase the circulating current
We need the biasing of differential relay biased to avoid mal operation when used for transformer protection due to __
Options
A : mismatch of CT
B : saturation of
C : difference in connection of both sides of CT
D : current setting mismatch
When a line commutated converter operates in the inverter mode then
Options
A : it draws real and reactive power from the supply
B : it delivers both real and reactive power to the supply
C : it delivers real power to the supply
D : it delivers reactive power to the supply
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