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Power Systems

Power Systems
Pipes carrying steam are generally of

 cobalt.
 aluminium.
  steel.
 cast iron.

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Power Systems
For a lossy transmission line, the characteristic impedance does not depend on

 The operating frequency of the line.
 The conductivity of conductors.
 The load terminating the line.
 The permittivity of the dielectric separating the conductor.

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Power Systems
Mho relay is usually employed for protection of

 any line
 short transmission lines only
 long transmission lines only
 medium transmission lines only

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Power Systems
A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

 1.232 mH
 1.043 mH
 1.093 mH
 1.182 mH

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Power Systems
A 3 layer and diameter of each strand is d, then find the total diameter of ACSR conductor?

 3d
 d
 2d
 5d

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Power Systems
In which of the following frequency control method tie line may be overloaded?

 flat frequency control
 flat tie line control
 parallel frequency
All of these

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