Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________?
A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
E. 60 : 40
A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
E. 60 : 40