The depth of a sludge soak pit varies from _____________
(a) 0.5-1.75 m
(b) 2.5-4 m
(c) 5-6.5 m
(d) 8-9.5 m
This question was addressed to me during a job interview.
This interesting question is from Systems of Plumbing in chapter Plumbing for Buildings of Construction & Building Materials