Govt Exams Mock Test FREE | Online Quiz Competition

Q1. A single phase semi converter has \(400 \sin 314t\) as the input voltage and R as the load. For the firing angle of 60 ˚ for the SCR, the average output voltage is

600/ \(\pi\)

300/ \(\pi\)

240/ \(\pi\)

100/ \(\pi\)

Q2. Circuit breaker used for over current protection of thyristor operates when the fault current is

of long period

of short duration

Both (A) and (B)

Neither (A) and (B)

Q3. A single phase fully controlled dual converter uses _________ Thyristors.

2

8

4

6

Q4. How much is the ripple frequency in a bridge rectifier with respect to the input frequency?

3 \(\times\) input frequency

4 \(\times\) input frequency

2 \(\times\) input frequency

Same as input frequency

Q5. MOSFET are suitably used were

Latching characteristics required

frequency is comparatively high

Both A & B

none of the above

Q6. In boost converter, the critical capacitance value of the capacitor 'C' connected across the load is

inversely proportional to the square of the
switching frequency

inversely proportional to the switching frequency

directly proportional to the switching frequency

directly proportional to the square of the switching frequency

Q7. After triggering an SCR, the gate pulse is removed, the current in the SCR will

remain the same

immediately fall to zero

rise up

rise a little and fall to zero.

Q8. A current transformer

should have its secondary open while the primary is carrying current

should never have its secondary open while the primary is carrying current

is never used with the secondary circuit closed through ammeters, wattmeters, current coils or relay coils

may keep the secondary circuit closed without any serious trouble

Q9. The secondary winding of which of the following transformers is always kept closed?

Current transformer

Voltage transformer

Power transformer

Stepdown transformer

Q10. Consider the following two statements and identify the correct option.
Statement 1: Piezoelectric transducer requires external power supply for their operation and is not self generating.
Statement 2 : Thermistor do not require any external source of supply for their operation and is self generating.

Statement - 1 is FALSE and Statement – 2 is TRUE

Both Statement -1 and Statement – 2 are TRUE

Both Statement -1 and Statement – 2 are FALSE

Statement - 1 is TRUE and Statement – 2 is FALSE

Quiz

Year 2024

June
Week # 4 Quiz 2

Q1. A single phase semi converter has \(400 \sin 314t\) as the input voltage and R as the load. For the firing angle of 60 ˚ for the SCR, the average output voltage is

Q2. Circuit breaker used for over current protection of thyristor operates when the fault current is

Q3. A single phase fully controlled dual converter uses _________ Thyristors.

Q4. How much is the ripple frequency in a bridge rectifier with respect to the input frequency?

Q5. MOSFET are suitably used were

Q6. In boost converter, the critical capacitance value of the capacitor 'C' connected across the load is

Q7. After triggering an SCR, the gate pulse is removed, the current in the SCR will

Q8. A current transformer

Q9. The secondary winding of which of the following transformers is always kept closed?

Quiz

Year 2024

December Week # 1 Expire on 31 Dec 2024

December Week # 2 Expire on 07 Jan 2025

December Week # 3 Expire on 14 Jan 2025

December Week # 4 Expire on 21 Jan 2025

June Week # 4 Quiz 2

Q1. A single phase semi converter has \(400 \sin 314t\) as the input voltage and R as the load. For the firing angle of 60 ˚ for the SCR, the average output voltage is

Q2. Circuit breaker used for over current protection of thyristor operates when the fault current is

Q3. A single phase fully controlled dual converter uses _________ Thyristors.

Q4. How much is the ripple frequency in a bridge rectifier with respect to the input frequency?

Q5. MOSFET are suitably used were

Q6. In boost converter, the critical capacitance value of the capacitor 'C' connected across the load is

Q7. After triggering an SCR, the gate pulse is removed, the current in the SCR will

Q8. A current transformer

Q9. The secondary winding of which of the following transformers is always kept closed?

Record & Track Your Performance

June
Week # 4 Quiz 2