California Water Distribution Operator Exam, Equipment Operation, Maintenance and Inspections: all 35 questions
All questions from the Equipment Operation, Maintenance and Inspections section for California Water Distribution Operator Exam, each with the correct answer.
- 3001Which valve is normally used to isolate a section of main and is operated fully open or fully closed?
- 3002What is the purpose of a check valve on a pump discharge?
- 3003Where is an air release valve normally installed?
- 3004Which valve type takes many turns of the operator to close, which helps limit water hammer?
- 3005What is a valve exercising program?
- 3006A valve box is found paved over after a street resurfacing. What should the operator do?
- 3007Which meter type is most common for single-family residential service?
- 3008Why is it important to choose the correct meter size for a customer?
- 3009A compound meter is used for which type of service?
- 3010What is the main difference between a dry-barrel and a wet-barrel hydrant?
- 3011After shutting off a dry-barrel hydrant, how can an operator confirm the barrel is draining?
- 3012Why are thrust blocks installed on a water main?
- 3013How should a hydrant be operated during flushing to limit surges?
- 3015How is the feed rate of a chemical metering pump typically adjusted?
- 3016How is a chemical feed pump calibrated using a graduated cylinder?
- 3017A chemical feed pump runs but delivers no chemical. Which is a likely cause?
- 3018What is the purpose of a sacrificial anode in cathodic protection?
- 3019What does a corrosion cell need besides an anode and a cathode?
- 3020What is the purpose of SCADA in a water system?
- 3021A SCADA tank level transmitter outputs 4 to 20 mA. What does 4 mA normally represent?
- 3022Which pump type is most common for booster stations in water distribution?
- 3023What happens in a centrifugal pump when the discharge valve is shut with the pump still running?
- 3024Which condition indicates abnormal pump operation?
- 3025How much leakage should a packed centrifugal pump gland normally show?
- 3026What must be done before working on an electric motor or pump?
- 3027What should be checked before starting a standby generator for a routine test?
- 3028Why must a standby generator never be connected to a building panel without a transfer switch?
- 3029What routine attention do in-line chlorine analyzers need?
- 3030What is proper backfill practice around a newly installed pipe?
- 3031What is the purpose of pipe bedding?
- 3032Which finding during inspection shows that a pipe is damaged and should not be installed?
- 3033How can thrust be resisted where a concrete block is not practical?
- 3034What does a sanitary seal on a well do?
- 3035What is the purpose of a tank overflow pipe?
- 3036Which security measure is commonly used for storage facilities?