As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio_____________________?

(A) increases ()
(B) decreases (X)
(C) remains same (X)
(D) first increases and then decreases (X)
(E) first decreases and then increases (X)

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