Cross-Connections May 9, 2024 by Brian Klein /28 0 votes, 0 avg 0 Cross-Connections 1 / 28 What kind of backflow prevention device works by closing a check valve and sealing the water supply line shut when water flow is stopped? A vacuum breaker Partitioning Neither Both Wrong! Thats right! 2 / 28 Which is true about the differences between a cross-connection, cross-contamination, and cross-contact? Cross-contact is the transfer of allergens Cross-contamination is the transfer of pathogens A cross-connection can allow clean water and unsafe water to mix All are correct Wrong! Thats right! Cross-contamination, cross-contact, and cross-connection are ways food can become contaminated. Each one refers to a different kind of contamination. Cross-contamination occurs when biological, chemical, or physical contaminants are transferred from one food or surface to another. Cross-contact happens when allergens are transferred to a food that shouldn’t contain them and then is served to a guest with allergies. A cross-connection is a situation that can occur in a building’s plumbing system, creating the potential for wastewater to mix with drinking water. 3 / 28 What is it called when high water use in one area of an operation creates a vacuum in the plumbing system that sucks contaminants back into the water supply? Backsiphonage Fecal-oral route Neither Both Wrong! Thats right! 4 / 28 Why is a cross-connection dangerous? Backsiphonage can occur Backflow can occur Neither Both Wrong! Thats right! 5 / 28 Who should work on the plumbing in your operation? A licensed plumber A certified technician Neither Both Wrong! Thats right! 6 / 28 What can happen if drinkable water becomes mixed with unsafe water? Foodborne illness outbreak Mineral deposits Neither Both Wrong! Thats right! 7 / 28 Where are the air gaps on sinks that are properly designed and installed? The space between the faucet and the flood rim of a sink The space between the floor drain and the drainpipe of a sink Neither Both Wrong! Thats right! 8 / 28 When a water connection (like a pipe to a hose) includes an open space that prevents dirty water from flowing backward into clean water, what is this space called? A check valve An air gap Neither Both Wrong! Thats right! 9 / 28 What is it called when contaminated water flows backward (reverse) through a cross-connection and into a drinkable water supply? Backsiphonage Backflow Neither Both Wrong! Thats right! Backsiphonage and backflow are almost the same thing. Both can cause contaminated water and safe water to mix through a cross-connection. The difference is what caused the change in pressure within the buildings plumbing system. A food manager only needs to understand the basics of backflow and cross-connections and how to avoid them. 10 / 28 What device must be used when a hose is attached to a faucet? A physical barrier between hands and food A backflow prevention device Neither Both Wrong! Thats right! 11 / 28 What is a cross-connection? Cross-connection is dangerous because it can let backflow occur A physical link between safe and unsafe water that allows backflow Neither Both Wrong! Thats right! A cross-connection is a point in a plumbing system where the potable supply may come in contact with a potential source of contamination 12 / 28 What is a physical link (like a pipe or a hose) between safe water and dirty water called? A cross-connection Cross-contamination Neither Both Wrong! Thats right! 13 / 28 What is the most critical issue regarding water safety in your operation? Avoid creating a cross-connection A sink designated for handwashing Neither Both Wrong! Thats right! 14 / 28 What is the best way to prevent backflow? Never create a cross-connection Avoiding cross-contact Neither Both Wrong! Thats right! 15 / 28 Many backflow prevention devices have a way that they can be checked to see if they are working correctly. They should be checked periodically, and this should be documented. Who should check the device? A certified applicator A trained and certified technician Neither Both Wrong! Thats right! 16 / 28 What is an air gap? The air gap is the open space of air between a faucet and its drain The air gap keeps the clean water and contaminated water separate The air gap is the only sure way to prevent backflow All are correct Wrong! Thats right! Sometimes a hose is left sbmerged in a mop bucket or laying next to a floor drain. If the hose is also connected to a faucet, the air gap has been crossed. This is called a cross-connection because the faucet water is at risk of becoming contaminated by the mop bucket water or by water draining into the floor drain. 17 / 28 How does back-siphonage occur? A backward flow of water can happen when the clean water supply has less pressure than the source of contamination When part of the operation uses a lot of water, it can create a vacuum that pulls contaminants into the water supply Neither Both Wrong! Thats right! 18 / 28 What can happen if plumbing is NOT installed and maintained correctly? Backsiphonage Backflow Cross-connection All are correct Wrong! Thats right! Drinkable water could mix with unsafe water 19 / 28 Where is the air gap in a correctly designed and installed sink? Between the faucet and the flood rim of the sink Between the sink's drainpipe and the floor drain Neither Both Wrong! Thats right! 20 / 28 What can cause a backflow? High water use Backsiphonage Neither Both Wrong! Thats right! High water use in one area of the operation can create backsiphonage and cause a backflow. 21 / 28 Where are the two air gaps in a properly designed sink located? Between the faucet and the flood rim of the sink Between the drainpipe of the sink and the floor drain Neither Both Wrong! Thats right! 22 / 28 Why are air gaps critical for safe water? To make backflow impossible To allow back-siphonage Neither Both Wrong! Thats right! 23 / 28 How can backflow be prevented? By creating an air gap Install a backflow prevention device Neither Both Wrong! Thats right! 24 / 28 How to prevent backflow? Install vacuum breakers on threaded faucets Install air gaps wherever practical and possible Neither Both Wrong! Thats right! 25 / 28 Which is an example of a cross-connection? A running hose is left submerged in a mop bucket A running faucet below the flood rim of a sink Neither Both Wrong! Thats right! 26 / 28 A vacuum breaker is one example of a mechanical device that will prevent backflow. What is another example of a backflow prevention device? A double check valve A reduced pressure zone Neither Both Wrong! Thats right! 27 / 28 What example does ServSafe give of a cross-connection that can lead to back-siphonage? A faucet is installed below the flood rim of its sink A hose is connected to a faucet and left in a bucket Neither Both Wrong! Thats right! 28 / 28 What is an example of a backflow prevention device with multiple check valves that will seal and protect your building’s clean water supply in case of a backflow? A double check valve A vacuum breaker Neither Both Wrong! Thats right! Your score is LinkedIn Facebook Twitter Restart quiz Try another practice test
