Sunday, August 14, 2016

Lucknow Metro Questoions



Q1:- In protection of transmission line against overvlotage due to lightning the lightning arrestor is connected b/w

  1. transmission line conductor and earth 
  2. transmission line conductor and primary bushing  of transformers
  3. transmission line condutor 
  4. transmission line condutor and overhead ground wires
ANSWER:- 1



Q2:- Which motor is used whee high starting torque and wide speed range control is required 

  1. 1- phase capacitor start motor
  2. dc motor
  3. induction motor
  4. synchronous motor
ANSWER:-2



Q3:- Overexcited synchronous motors are used for 

  1. reducing the copper losses of inductive load
  2. improving power factor of power systems with more inductive load 
  3. reducing power factor of power system with more inductive load
  4. maintaining the power factor to zero 
ANSWER:-2



Q4:- The standard rating HP OF an Induction Motor is equivalent to 

  1. 573.5 w
  2. 374.5 w
  3. 753.5 w
  4. 735.5 w 
ANSWER:-4



Q5:- Lighting arrestor is consists of 

  1. a spark gap with non linear resistor
  2. a spark gap in parallel non linear resistor
  3. a spark gap in series with linear resistor 
  4. a spark gap in parallel with linear resisitaor
ANSWER:-1


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