Electrical Engineering Online Quiz Competition

 

 

1. Which of the following is the transformer configuration can be used as distribution transformer? 

Star-Delta

Star-Star

Delta-Star

Delta-Delta

Answer: Delta-Star

 

2. Most efficient electrical device is ________ 

Generator

Motor

Transformer

All are equal efficient

Answer: Transformer

 

3. What is correct colour code for 47 ohm resistor? (Format: Colour, Colour, Multiplier colour, Tolerance) 

Yellow, Violet, Black, Black

Yellow, Green, Black, Brown

Yellow, Violet, Black, Red

Yellow, Violet, Black, Brown

Answer: Yellow, Violet, Black, Brown

 

4. What is the ohmic resistance between Gate terminal and Emitter terminal in case of IGBT? 

Greater than 10 Kilo-Ohm

Greater than 500 Kilo-Ohm

Approximately Open(Very High Resistance)

Approximately Close(Very Low Resistance)

Answer: Approximately Open(Very High Resistance)

 

5. The illumination fixture which consumes lowest energy is 

Incandescent lamp

CFL

LED

Fluorescent Tube Light

Answer: LED

 

6. Calculation formula to find 3-phase power : 

Power= Line Voltage Line Current  Power Factor

Power= 1.732  Line Voltage Line Current Power Factor

Power= 1.732 Phase Voltage Phase Current Power Factor

Power= 3   Line Voltage   Line Current   Power Factor 7

Answer: Power= 1.732  Line Voltage Line Current Power Factor

 

7. The power transmission is transmitted at 

Low Voltage ,Low Current

Low Voltage ,High Current

High Voltage, High Current

High Voltage, Low Current

Answer: High Voltage, Low Current

 

8. What is Industry 4.0 also called? 

The Data Acquisition Revolution

The Semantic Web Revolution

The Smart Factory Revolution

The Information Revolution

Answer: The Information Revolution

 

9. Which optocoupler has less current range? 

Diode

Traic

Transistor

Thyristor

Answer: Diode

 

10. Why (4-20) mA is is considered over (0-10) V signal? 

Voltage Signal has tendency to be weaken over long distance due to resistance

Voltage signal has distortion property

As mA (mili ampere) current range is safe to use

None of the above

Answer: Voltage Signal has tendency to be weaken over long distance due to resistance

 

11.The electrical energy generated at power plant is standard of 

33 kV,60 Hz

33 kV, 50 Hz

11 kV, 50 Hz

11 kV,60 Hz

Answer: 11 kV, 50 Hz

 

12. Purpose of making Earth Pit is to get 

High resistance

Low resistance

Resistance as per system requirement

None of the above

Answer: Low resistance

 

13. Minimum number of earth terminals required for 1-phase system & 3-phase system are 

1 no. for both 1-phase as well as 3 phase system

1 no. for 1-phase & 2 nos. for 3-phase

1 no. for 1-phase & 3 nos. for 3-phase

Any of the above

Answer: 1 no. for 1-phase & 2 nos. for 3-phase

 

14. Which device is used to improve power factor of electrical system? 

Reactor

Capacitor Bank

Resistance

Filter circuit

Answer: Capacitor Bank

 

15. What is the use of rectifier & inverter circuit? 

Both Rectifier & Inverter: To convert AC to DC

Rectifier: DC to AC , Inverter : AC to DC

Both Rectifier & Inverter : DC to AC

Rectifier: AC to DC , Inverter : DC to AC

Answer: Rectifier: AC to DC , Inverter : DC to AC