Drain traps serve which of the following purposes:

Drain traps serve which of the following purposes:



i) to seal the outlet fixture
ii) to prevent back flow of sewer gas
iii) to deflect grease and oil for separate disposal


a) ii) only
b) i) only
c) both i) and iii)
d) both i) and ii)
e) i), ii) and iii)


Answer: D


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