| # | If a valve is closed too rapidly, it will cause the water to come to a sudden stop causing waves of pressure that oscillate back and forth in a section of pipe. This reaction is called? | static pressure. | continuous positive pressure. | thrust. | water hammer. | | 4
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| 1 | One of the purposes of water storage tanks is? | to increase the carbon dioxide content. | to supply water at peak demands. | to decrease the oxygen content. | to improve the taste. | | 2 |
| 2 | A water main should be disinfected? | when the pipe is in the storage yard. | after the pipe is delivered to the job site. | after the pipe is laid in place. | at the manufacturer's plant. | | 3 |
| 3 | Which of the following types of meters has no moving parts? | rotometer. | venturi. | proportional. | propellor. | | 2 |
| 4 | In order to facilitate check-valve repairs, a gate valve should be placed. | between the pump and the check valve. | on the discharge side of the check valve. | on the suction side of the pump. | | | 2 |
| 5 | A valve that joins a customer's service to the water main is called the ? | control flume. | pressure regulating valve. | corporation cock. | bypass valve. | | 3 |
| 6 | A device that can be used to repair a cracked water main is a? | cast coupling. | flanged adapter. | split sleeve. | tapered screw plug. | | 3 |
| 7 | ___________ meters are used where the water demand varies considerably? | Venturi. | Pitot tube. | Orifice. | Compound. | | 4 |
| 8 | The carrying capacity of water mains is often reduced by? | tuberculation. | looping. | vacuum breakers. | lining. | | 1 |
| 9 | The basic pipeline size used in a water distribution system is determined by? | customer need. | desired pressure. | elevation and friction losses. | fire protection needs. | | 4 |
| 10 | When opening and closing valves in high pressure lines, the valves should be? | opened and closed as rapidly as possible. | tightened by a wrench after closing. | opened and closed slowly. | opened slowly and closed rapidly. | | 3 |
| 11 | Which is the correct type of valve for controlling the level of a treated-water storage reservoir that is below the level of the hydraulic gradient? | reduced pressure backflow valve. | pressure relief valve. | altitude valve. | check valve. | | 3 |
| 12 | Rising stem valves are most often used? | on blow-offs. | on hydrants. | before and after house meters. | in pumping stations. | | 4 |
| 13 | To determine whether an intersecting sewer line crosses over of under a water main, one would look at the? | elevation view. | plan view. | architectural detail. | general site. | | 1 |
| 14 | Which of the following is not an acceptable storage unit for a public water system? | elevated storage tank. | pressure tank. | ground storage tank. | cistern. | | 4 |
| 15 | The primary reason for dry-barrel fire hydrant is to? | allow easy maintenance of the hydrant. | prevent water hammer. | keep the hydrant from freezing. | keep the barrel from rusting. | | 3 |
| 16 | Under the same pressure condition, the amount of water that can be carried by a 2-in. pipe as compared with a 1-in. pipe in? | twice as much. | three times as much. | three and one half times as much. | four times as much. | | 4
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