1.As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

2.Efficiency of gas turbine is increased by

3.The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

4.The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is

5.The degree of reaction of an axial flow turbine is the ratio of is entropic temperature drop in a blade row to the