# 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 : -

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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