Amazinggrace

What is a corbel? - masonry projecting upward and outward from a wall or chimney A cricket is designed to_________. - redirect water and snow away from the chimney What is a wythe? - A course of brick separating flues within a chimney When a round flue is used for the lining of a fireplace chimney the proper fireplace opening to flue size ratio should be? - 12:1 Where unlined the smoke chamber walls shall be what thickness? - 8" When the opening of the fireplace is 6 square feet the exten...

Draft is measured by... - inches in water column Definition of Draft - Difference of pressure INSIDE and OUTSIDE the venting system Easiest solution to "back puffing" stove? - Give it more air What has the greatest effect on FLOW? - Size of venting system passageway A masonry chimney is required by what to have a cleanout if the flue previously vented a solid or liquid fuel appliance? - NFPA 54 (National Fuel Gas Code) High efficiency gas + oil appliances generate a lot of____ which can_...

Which process converts ammonia to nitrite and nitrate? - Nitrification What is the maximum advisable rate of chlorine gas removal from a 150- pound cylinder? - 40 pounds per day What is a type of positive displacement water meter? - Nutating- disk meter What is a power-operated mechanism for opening and closing a valve? - Actuator What is required if a routine sample test positive for total coliform bacteria? - Take repeat samples Why is a grid layout better than a tree layout for a water ...

Head is measured in - feet A plat is - A map Which type of valve will prevent the collapse of a pipe - Air-and-vaccume relief valve The highest degree of protection of a coated steel pipe is - cathodic protection At which time of day is the age of the water stored in the distribution system the highest? - In the morning One of chlorines advantages is that it - has a persistent residual Chlorine gas is _____ times heavier than air. - 2.5 After a water storage tank has been chlorinated, wh...

What do water distribution system operators have the responsibility for? - The health and well-being of the community they serve Frequently the water supplier tries to maintain specific minimum target __________________ throughput the distribution system. - Water pressure (20 PSI minimum) All trenches and excavations are unsafe until... - Proper shoring, used, and back filled Can the quality of water coming out of the consumers tap can be affected by what happens to the water as it travels...

Distribution systems are usually laid out in which of the following patterns besides Tree shaped and Grid designs? a. Loops and/or circular designs b. Vertical designs without backflow prevention devices c. Horizontal lines that flow into open ponds then back into a closed pipe d. Horizontal lines that flow into underground sumps then back into a closed pipe - a. Loops and/or circular designs Dead ends in a system are usually located on a. Loops and/or circular designs b. Tree shaped an...

A noisy or vibrating valve may be an indication of what? - Cavitation The selective destruction or inactivation of pathogenic organisms is - Disinfection Pathogenic organisms can be removed from water, killed, or inactivated by - Filtration The most commonly used distribution system disinfection is - Free chlorine A greenish- yellow gas with a penetrating and distinctive odor, two and a half times heavier than air is - Chlorine A brief session to discuss aspects of a job and safety - Tailg...

Potable water may be defined as: a. Any water that occasionally may be polluted from another source b. Any water that, according to recognized standards, is safe for consumption c. Water high in organic content d. Water that has been transported from outside the service area - b). Any water that according to recognized standard is safe for human consumption. To prevent the entry of surface contamination into a well is the purpose of: a. The well casing b. The louvers or slots c. Well de...

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