Water Distribution Grade I - Practice Exam 1 Questions and Answers 100% Correct!

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 are - ANSWER-NTU Water systems can be divided into two parts - ANSWER-Treatment and distribution system Water velocity in mains is usually expressed as - ANSWER-Feet per second Water table is defined as - ANSWER-Groundwater upper surface