Compressors, Gas Turbines and Jet Engines
Choose the correct statement

Gas turbine is capable of rapid start up and loading
Gas turbines has flat efficiency at part loads
Gas turbine requires lot of cooling water
Gas turbines have high standby losses and require lot of maintenance

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Compressors, Gas Turbines and Jet Engines
In n₁ and n₂ are the indices of compression for the first and second stage of compression, then the ratio of work-done on the first and second stages (W₁/W₂) with perfect intercooling is given by

W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
W₁/W₂ = n₂/n₁
W₁/W₂ = n₁/n₂
W₁/W₂ = n₂(n₁ - 1)/n₁(n₂ - 1)

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