Water Distribution Grade I - Practice Exam 1 Accurate 100%

A check valve must - ANSWER Be able to withstand hydraulic shock loads Excessive amounts of iron & manganese in drinking water are objectionable because they - ANSWER Stain Clothes Check valve important feature(s) must - ANSWER Must close watertight Routine service calls frequently to a well pump facility depends on - ANSWER Manpower availability An operator should never enter a room containing a high chlorine gas concentration without - ANSWER (All are correct) -Help standing by -Notifying supervisor -Notifying proper authorities -A self contained air supply Water quality criteria important for a good municipal water supply - ANSWER Attractive taste During water supply reservoir inspection, a water quality that should be notes is - ANSWER Odor The pH scale goes from - ANSWER 0-14 What is the purpose(s) of flushing water distribution line? - ANSWER Clean out lines Task(s) conducted during a routine valve inspection are - ANSWER Determine valve location accuracy on system map Distribution systems are expected to deliver - ANSWER (All are correct) -Adequate pressure -Water of sustainable quality -Potable water -Sufficient water Thrust blocks prevent - ANSWER Joint separation The units of turbidity