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MCQs on Transmission and Distribution

May 5, 2017 by admin

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1. The dielectric strength of air under normal condition is
(a) 30 kV/cm.
(b) 100 kV/cm.
(c) 150 kV/cm.
(d) 200 kV/cm.  

Answer

           A 

2. Peterson coil is used in
(a) DC transmission line.
(b) AC transmission line.
(c) DC generator.
(d) Alternator.    

Answer

           B 

3. Bundled conductors in EHV transmission lines
(a) increase inductance.
(b) increase capacitance.
(c) decrease inductance.
(d) decrease capacitance.    

Answer

           C 

4. The most commonly used lighting arrester in substations is
(a) horn gap.
(b) god gap.
(c) thyrite.
(d) multi gap.   

Answer

           C 

5. The reflection coefficient for a open circuit line is
(a) 1.
(b) zero.
(c) 0.5.
(d) – 1.   

Answer

           A 

6. The reflection coefficient for a short circuit line is
(a) 1.
(b) Zero.
(c) 0.5.
(d) – 1.     

Answer

           D 

7. The voltage regulation of a transmission line is greatest for
(a) lagging power factor.
(b) leading power factor.
(c) zero power factor.
(d) none of these.   

Answer

           A 

8. The function of booster in the circuit is to
(a) reduce current.
(b) increase current.
(c) reduce voltage drop.
(d) compensate for voltage drop.    

Answer

           D 

9. The rated voltage of a 3-phase power system is given as
(a) rms line to line voltage.
(b) peak line to line voltage.
(c) rms phase voltage.
(d) peak phase voltage.    

Answer

           A 

You may also read
• Why all the voltage levels are multiples of 11 kV?
• Why Motor rated in kW instead of kVA?

10. The number of strands of ACSR conductor for 3 layer transmission line are
(a) 3.
(b) 11.
(c) 19.
(d) 23.   

Answer

           C 

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Also Read :

  • Why all the voltage levels are multiples of 11 kV? asked by Bahu
  • What is the function of a choke in tube light? asked by varu
  • What is the difference between Earthing and Grounding? asked by admin
  • Why Motor rated in kW instead of kVA? asked by Guma


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