Govt Exams Mock Test FREE | Online Quiz Competition

Q1. A single phase AC regulator fed from 50 Hz system supplies a load having resistance and inductance of 4.0 Ω and 12.73 mH, respectively. The control range of firing angle is

\(135˚ < \alpha < 180˚ \)

\(45˚ < \alpha < 180˚ \)

\(90˚ < \alpha < 180˚ \)

\(0˚ < \alpha < 45˚\)

Q2. An AC voltage controller has a pure resistive load of \(10\:\Omega\) and input voltage is 150 V(RMS), 50 Hz. The thyristor switch is ON for 25 cycles and OFF for 75 cycles. Determine the RMS output voltage and input power factor.

75 V and 0.5

150 V and 0.5

150 V and 0.866

75 V and 0.866

Q3. A voltage source inverter is used for which of the following application?

UPS

Regulated DC power supply

Rotary converter

All of these

Q4. The MOSFET switch in its on-state may be considered equivalent to

resistor

inductor

capacitor

battery

Q5. For continuous conduction in a single phase semiconverter, each SCR conducts for___________.

\(\pi\)

\(\alpha\)

\(\pi - \alpha \)

\(\pi + \alpha \)

Q6. Which of the following exhibits negative resistance in a portion of its characteristic?

tunnel diode

Zener diode

JFET

MOSFET

Q7. A triac is a:

Three terminal bidirectional switch

Three terminal unilateral switch

Two terminal switch

Two terminal bilateral switch

Q8. Creeping in a single phase energy meter may be due to

Vibration

Overvoltages

Overcompensation of friction

All of above

Q9. In PMMC instruments the scale is

non-linear.

logarithmic.

exponential.

uniformally divided.

Q10. The most efficient form of damping employed in electrical instruments is

Air friction

Fluid friction

Eddy currents

None of the above

Quiz

Year 2024

November
Week # 4 Quiz 2

Q1. A single phase AC regulator fed from 50 Hz system supplies a load having resistance and inductance of 4.0 Ω and 12.73 mH, respectively. The control range of firing angle is

Q2. An AC voltage controller has a pure resistive load of \(10\:\Omega\) and input voltage is 150 V(RMS), 50 Hz. The thyristor switch is ON for 25 cycles and OFF for 75 cycles. Determine the RMS output voltage and input power factor.

Q3. A voltage source inverter is used for which of the following application?

Q4. The MOSFET switch in its on-state may be considered equivalent to

Q5. For continuous conduction in a single phase semiconverter, each SCR conducts for___________.

Q6. Which of the following exhibits negative resistance in a portion of its characteristic?

Q7. A triac is a:

Q8. Creeping in a single phase energy meter may be due to

Q9. In PMMC instruments the scale is

Q10. The most efficient form of damping employed in electrical instruments is

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

November Week # 4 Quiz 2

Q1. A single phase AC regulator fed from 50 Hz system supplies a load having resistance and inductance of 4.0 Ω and 12.73 mH, respectively. The control range of firing angle is

Q2. An AC voltage controller has a pure resistive load of \(10\:\Omega\) and input voltage is 150 V(RMS), 50 Hz. The thyristor switch is ON for 25 cycles and OFF for 75 cycles. Determine the RMS output voltage and input power factor.

Q3. A voltage source inverter is used for which of the following application?

Q4. The MOSFET switch in its on-state may be considered equivalent to

Q5. For continuous conduction in a single phase semiconverter, each SCR conducts for___________.

Q6. Which of the following exhibits negative resistance in a portion of its characteristic?

Q7. A triac is a:

Q8. Creeping in a single phase energy meter may be due to

Q9. In PMMC instruments the scale is

Q10. The most efficient form of damping employed in electrical instruments is

Record & Track Your Performance

November
Week # 4 Quiz 2