The air-fuel ratio in gas turbines is of the order of ______________________?
A. 7 : 1
B. 15 : 1
C. 30 : 1
D. 40 : 1
E. 50: 1
A. 7 : 1
B. 15 : 1
C. 30 : 1
D. 40 : 1
E. 50: 1