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Select the correct answer for the followings: 1. PVC pipe is not used in exposed services because; a. It's cost is high. b. It's strength is reduced by UV rays, c. It is available in small sizes. d. None of above answers. 2. Glob valve is seldom used in water distribution systems because of; a. It's short life. b. It's high head loss. c. It can't resist high water pressure. d. None of above answers. 3. When the average water demand for a city is 20000 m³/day, the maximum hourly water demand for this city is; a. 30000 m³/day. b. 54000 m³/day. c. 36000 m³/day. d. None of above answers. 4. Lime is always added when the used coagulant is; a. Alum. b. Ferric chloride. c. Aluminum sulfate. d. All of above answers. 5. Treatment of water with alum increases; a. Acidity and hardness of water. b. Alkalinity and hardness of water c. Sulfates in water. d. pH of water. 6. The fire storage required for a residential area composed of attached houses is; a. 5670m³. b. 453.6m³. c. 4082.4m³. d. None of above answers. 7. Thrust blocks are used at; a. Pipe bends when the joints are of push-on type. b. Pipe bends when the joints are of flanged type. c. Pipes end. d. Rivers crossing. 8. If treated water flowrate is 40000m³/day, alum dose is 20mg/l and solution strength is 5%, the volume of alum solution tank is; a. 800m³. b. 15.2m³. c. 16.0m³. d. None of above answers.

Select the correct answer for the followings: 1. PVC pipe is not used in exposed services because; a. It's cost is high. b. It's strength is reduced by UV rays, c. It is available in small sizes. d. None of above answers. 2. Glob valve is seldom used in water distribution systems because of; a. It's short life. b. It's high head loss. c. It can't resist high water pressure. d. None of above answers. 3. When the average water demand for a city is 20000 m³/day, the maximum hourly water demand for this city is; a. 30000 m³/day. b. 54000 m³/day. c. 36000 m³/day. d. None of above answers. 4. Lime is always added when the used coagulant is; a. Alum. b. Ferric chloride. c. Aluminum sulfate. d. All of above answers. 5. Treatment of water with alum increases; a. Acidity and hardness of water. b. Alkalinity and hardness of water c. Sulfates in water. d. pH of water. 6. The fire storage required for a residential area composed of attached houses is; a. 5670m³. b. 453.6m³. c. 4082.4m³. d. None of above answers. 7. Thrust blocks are used at; a. Pipe bends when the joints are of push-on type. b. Pipe bends when the joints are of flanged type. c. Pipes end. d. Rivers crossing. 8. If treated water flowrate is 40000m³/day, alum dose is 20mg/l and solution strength is 5%, the volume of alum solution tank is; a. 800m³. b. 15.2m³. c. 16.0m³. d. None of above answers.

Residential Construction Academy: House Wiring (MindTap Course List)
Residential Construction Academy: House Wiring (MindTap Course List)
5th Edition
ISBN:9781337402415
Author:Gregory W Fletcher
Publisher:Gregory W Fletcher
Chapter4: Test And Measurement Instruments Used In Residential Wiring
Section: Chapter Questions
Problem 12RQ
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Select the correct answer for the followings: 1. PVC pipe is not used in exposed services because; a. It's cost is high. b. It's strength is reduced by UV rays, c. It is available in small sizes. d. None of above answers. 2. Glob valve is seldom used in water distribution systems because of; a. It's short life. b. It's high head loss. c. It can't resist high water pressure. d. None of above answers. 3. When the average water demand for a city is 20000 m³/day, the maximum hourly water demand for this city is; a. 30000 m³/day. b. 54000 m³/day. c. 36000 m³/day. d. None of above answers. 4. Lime is always added when the used coagulant is; a. Alum. b. Ferric chloride. c. Aluminum sulfate. d. All of above answers. 5. Treatment of water with alum increases; a. Acidity and hardness of water. b. Alkalinity and hardness of water c. Sulfates in water. d. pH of water. 6. The fire storage required for a residential area composed of attached houses is; a. 5670m³. b. 453.6m³. c. 4082.4m³. d. None of above answers. 7. Thrust blocks are used at; a. Pipe bends when the joints are of push-on type. b. Pipe bends when the joints are of flanged type. c. Pipes end. d. Rivers crossing. 1 8. If treated water flowrate is 40000m³/day, alum dose is 20mg/l and solution strength is 5%, the volume of alum solution tank is; a. 800m³. b. 15.2m³. c. 16.0m³. d. None of above answers.
Transcribed Image Text:Select the correct answer for the followings: 1. PVC pipe is not used in exposed services because; a. It's cost is high. b. It's strength is reduced by UV rays, c. It is available in small sizes. d. None of above answers. 2. Glob valve is seldom used in water distribution systems because of; a. It's short life. b. It's high head loss. c. It can't resist high water pressure. d. None of above answers. 3. When the average water demand for a city is 20000 m³/day, the maximum hourly water demand for this city is; a. 30000 m³/day. b. 54000 m³/day. c. 36000 m³/day. d. None of above answers. 4. Lime is always added when the used coagulant is; a. Alum. b. Ferric chloride. c. Aluminum sulfate. d. All of above answers. 5. Treatment of water with alum increases; a. Acidity and hardness of water. b. Alkalinity and hardness of water c. Sulfates in water. d. pH of water. 6. The fire storage required for a residential area composed of attached houses is; a. 5670m³. b. 453.6m³. c. 4082.4m³. d. None of above answers. 7. Thrust blocks are used at; a. Pipe bends when the joints are of push-on type. b. Pipe bends when the joints are of flanged type. c. Pipes end. d. Rivers crossing. 1 8. If treated water flowrate is 40000m³/day, alum dose is 20mg/l and solution strength is 5%, the volume of alum solution tank is; a. 800m³. b. 15.2m³. c. 16.0m³. d. None of above answers.
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