RRB JE electrical practice paper-2 | RRB JE Electrical

Ques.11. A single phase full bridge inverter can be operated in load commutation mode in case when the load consists of

  1. RL
  2. RLC underdamped
  3. RLC over Damped
  4. RLC critically damped

Answer.2. RLC underdamped

 

Ques.12. Which of the following relay is preferred for phase fault on the short transmission line

  1. Reactance Relay
  2. Impedance Relay
  3. MHO relay
  4. Induction type Relay

Answer.2. Reactance Relay

 

Ques.13. Wave winding is preferred for which of the following rating?

  1. Low current and low voltage
  2. High current and high voltage
  3. Low current and high voltage
  4. High current and low voltage

Answer.3. Low current and high voltage

 

Ques.14. Materials having a high dielectric constant which are non-linear are known as

  1. Elastomers
  2. Ferroelectric materials
  3. Super dielectrics
  4. Hard dielectrics

Answer.2. Ferroelectric materials

 

Ques.15. The melting point of carbon is

  1. 2000°C
  2. 2500°C
  3. 3000°C
  4. 3550°C

Answer.4. 3550°C

 

Ques.16. The chemical with the lowest melting point is

  1. Helium
  2. Carbon
  3. Aluminum
  4. Sodium

Answer.1. Helium

 

Ques.17. A body contains electrons more than its normal number has

  1. Positive charge
  2. Negative charge
  3. No charge
  4. None of these

Answer.2. Negative charge

 

Ques.18. Any charged conductors, which receives electricity from the earth when connected to it, is said to be

  1. Positive potential
  2. No potential
  3. Negative Potential
  4. None of these

Answer.3. Negative Potential

 

Ques.19. When the resistance are connected in the parallel circuit then

  1. Branch current are additive
  2. Conductance are additive
  3. Power are additive
  4. All of the above

Answer.4. All of the above

 

Ques.20. Which of the following generators have two field windings?

  1. Series wound generator
  2. Shunt wound generator
  3. Compound wound generator
  4. All of the above

Answer.3. Compound wound generator

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