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Power Systems

Power Systems
Which of following materials can be used as coolant

 Helium.
  Any of above.
 Heavy water.
 CO2.

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Power Systems
For n bus power system size of Y bus matrix is

 (n-1)×(n-2)
 (n-1)×(n-1)
 n×n
 (n-2)×(n-2)

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Power Systems
Normally Z bus matrix is a

 null matrix
 full matrix
 unit matrix
 sparse matrix

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Power Systems
The power output from an hydroelectric plants depend on

 type of dam, type of catchment area and discharge.
 type of turbine, type of dam and type of catchment area.
 type of dam, head, system efficiency.
  discharge, system efficiency.

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Power Systems
Critical disruptive voltage is a voltage at which

 both 1 and 2
 nether 1 nor 2
 corona is visible with blue or violet colour
 corona is just initiated

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Power Systems
The internal flux linkage due to internal flux of a conductor is

 I/2*10-7 wb-T/m
All of these
 I/4*10-7 wb-T/m
 I/6*10-7 wb-T/m

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