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Power Systems

Power Systems
If sparsity of a 5 bus transmission line is 0.4. Find the number of transmission lines?

 5
 6
 4
 3

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Power Systems
Which one of following is employed as a moderator by CANDU type of slow thermal nuclear reactors

 Graphite.
  Heavy water.
 Beryllium.
 Water.

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Power Systems
Pin insulators are used up to

 33 kV
 any voltage level
 11 kV
 120 kV

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Power Systems
Oxide film arrestor has which of the following properties?

 Does not require daily charging.
 Both A and B.
 It is expensive.
 Installed at points of transmission line where daily visit is difficult.

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Power Systems
A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time?

 -0.76 Hz
 -0.85 Hz
 0.85 Hz
 0.76 Hz

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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
 Transmission system must be more efficient with minimum line losses
 nether 1 nor 2

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