What is grab sampling - Study guides, Class notes & Summaries

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CCIL EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADEA+ Sampling from a mixer/truck agitator- Where is sample taken? Correct Answer: Between 10% and 90% (Not when testing with Super P) How is a sample taken when sampling plastic concrete? Correct Answer: Either pass a receptacle completely through a discharge stream OR divert a discharge stream completely into a sampling container. How many grab samples are needed when testing for uniformity of samples? Cor...

Sampling from a mixer/truck agitator- Where is sample taken? - Between 10% and 90% (Not when testing with Super P) How is a sample taken when sampling plastic concrete? - Either pass a receptacle completely through a discharge stream OR divert a discharge stream completely into a sampling container. How many grab samples are needed when testing for uniformity of samples? - 3 What size sample is needed when casting 3 100mm x 200mm cylinders? - Minimum 20L What size sample is needed when cas...

1. How much does a cubic foot of water weigh? - Answer-a. 8.34 lbs b. 7.48 lbs c. 62.38 lbs d. 15.82 lbs 2. What is the best way to store a 150# chlorine gas cylinder? - Answer-a. On its side b. Above ground level c. Upright, secured from falling 3. Which is not a proper alternative for treatment of industrial wastewater? - Answer-a. Pretreatment by the IWTS followed by discharge to the POTW b. Direct discharge to receiving waters c. Discharge to POTW for treatment d. Complete treatme...

CCIL Exam Study Guide | 100 Questions with 100% Correct Answers | Updated & Verified 2024 Sampling from a mixer/truck agitator- Where is sample taken? - Correct Answer Between 10% and 90% (Not when testing with Super P) How is a sample taken when sampling plastic concrete? - Correct Answer Either pass a receptacle completely through a discharge stream OR divert a discharge stream completely into a sampling container. How many grab samples are needed when testing for uniformity of samples?...

What is the turbidity measurement that is visible to the naked eye? - ️️5 NTU What is the purpose of flocculation? - ️️To achieve optimum size particles which will readily settle out of the water or can be easily filtered. Addition of too much or too little coagulant decreases the efficiency of the treatment process. What are packing glands? - ️️Seals which prevent the pumped fluid from leaking from a pump and prevent air from entering What is backflow siphonage caused by in di...

Sampling from a mixer/truck agitator- Where is sample taken? - CORRECT AN-SWER Between 10% and 90% (Not when testing with Super P) How is a sample taken when sampling plastic concrete? - CORRECT ANSWER Either pass a receptacle completely through a discharge stream OR divert a discharge stream completely into a sampling container. How many grab samples are needed when testing for uniformity of samples? - CORRECT ANSWER 3 What size sample is needed when casting 3 100m...

ABC Class 1 Physical/Chemical Operator Exam 1. How much does a cubic foot of water weigh? - a. 8.34 lbs b. 7.48 lbs c. 62.38 lbs d. 15.82 lbs 2. What is the best way to store a 150# chlorine gas cylinder? - a. On its side b. Above ground level c. Upright, secured from falling 3. Which is not a proper alternative for treatment of industrial wastewater? - a. Pretreatment by the IWTS followed by discharge to the POTW b. Direct discharge to receiving waters c. Discharge to POTW...

What are grab samples and when is it used? - ️️A single sample taken at one place and time. Used when water quality and quantity are not variable What is used to measure flow in an open channel? - ️️Weirs or flumes. Flow is determined by the height of water at a particular point Why are particles that cause turbidity harmful? - ️️They can hide or entrap harmful organisms so that the disinfectant is unable to reach them. It calls increases CL demand which can be carcinogenic Wh...

1. How much does a cubic foot of water weigh? - Answer-a. 8.34 lbs b. 7.48 lbs c. 62.38 lbs d. 15.82 lbs 2. What is the best way to store a 150# chlorine gas cylinder? - Answer-a. On its side b. Above ground level c. Upright, secured from falling 3. Which is not a proper alternative for treatment of industrial wastewater? - Answer-a. Pretreatment by the IWTS followed by discharge to the POTW b. Direct discharge to receiving waters c. Discharge to POTW for treatment d. Complete treatme...

What are colloids? - Very small particles suspended in water which are resistant to settling. What is turbidity measured in? - Nephelometric Turbidity Units (NTU) What is the turbidity measurement that is visible to the naked eye? - 5 NTU What is an important indicator of treatment efficiency and particularly the efficiency of filters and disinfection processes? - Turbidity Why are particles that cause turbidity harmful? - They can hide or entrap harmful organisms so that the disinfe...