For a diesel generating station the useful life is expected to be around_________Years?
A. 15 to 20 years
B. 20 to 50 years
C. 50 to 75 years
D. 75 to 100 years
A. 15 to 20 years
B. 20 to 50 years
C. 50 to 75 years
D. 75 to 100 years