Power Systems
The main objectives of electrical power transmission is/are

 both 1 and 2
 Voltage regulation of the transmission line must be zero or minimum
 nether 1 nor 2
 Transmission system must be more efficient with minimum line losses

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Power Systems
In boiler water reactor (BWR)

 enriched uranium is used as fuel.
 the feed water acts both coolant and a moderator.
  all of above.
 there is danger of radioactive contamination of steam.

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