1.

(P) Duralumin - (Al = 95%, Cu = 4%, Mn = 0.5%, Mg=0.5%) (Q) Solder- (Sn = 50% to 60% Pb = 50% to 40%) (R) Brass- (Cu = 60% to 80% Sn = 0% to 40%)

A. (P)         (Q)        (R) False          True           False
B. (P)         (Q)        (R) True         False         True
C. (P)         (Q)        (R) False         True         False
D. (P)         (Q)        (R) True         False         False
Answer» C. (P)         (Q)        (R) False         True         False


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