WALMART MAINTENANCE Plumbing and Facilities 3 — Questions and Answers
Question 1: A floor drain in a Walmart produce section is draining slowly. What is the most likely cause?
- Grease and organic debris accumulation in the trap (Correct answer)
- A cracked drain pipe underground
- Low water pressure from the main supply
- A faulty pressure-reducing valve
Correct answer: Grease and organic debris accumulation in the trap
Slow floor drains in food areas are most commonly caused by grease and organic debris clogging the drain trap or strainer.
Question 2: Which type of valve is best suited for fully open or fully closed applications in a Walmart plumbing system?
- Globe valve
- Gate valve (Correct answer)
- Needle valve
- Pressure-relief valve
Correct answer: Gate valve
Gate valves are designed for full-open or full-closed service and should not be used for throttling flow.
Question 3: You notice a water hammer effect in a Walmart restroom supply line. What device would best correct this issue?
- Pressure-reducing valve
- Water hammer arrestor (Correct answer)
- Backflow preventer
- Expansion tank
Correct answer: Water hammer arrestor
A water hammer arrestor absorbs the shock wave created when water flow is suddenly stopped, eliminating the banging noise.
Question 4: A Walmart maintenance technician finds a pipe labeled with a yellow band and the word 'CAUTION.' What does this most likely indicate?
- Cold water supply
- Natural gas or flammable material (Correct answer)
- Compressed air
- Reclaimed water
Correct answer: Natural gas or flammable material
ANSI/ASME A13.1 pipe marking standards use yellow with black lettering to indicate flammable or combustible materials including natural gas.
Question 5: What is the primary function of a P-trap in a Walmart restroom fixture?
- Regulating water pressure to the fixture
- Preventing sewer gases from entering the building (Correct answer)
- Filtering sediment from the water supply
- Controlling the flow rate of wastewater
Correct answer: Preventing sewer gases from entering the building
A P-trap holds a water seal that blocks sewer gases from traveling back up through the drain and into the building.
Question 6: During a Walmart restroom inspection, you find a toilet that continuously runs after flushing. Which component should you check first?
- The flushometer diaphragm or flapper (Correct answer)
- The supply shut-off valve
- The drain vent stack
- The wax ring seal
Correct answer: The flushometer diaphragm or flapper
A continuously running toilet is most often caused by a worn or damaged flapper or flushometer diaphragm that fails to create a proper seal.
Question 7: A cross-connection in a Walmart plumbing system is dangerous because it can cause:
- Excessive water pressure buildup
- Contamination of the potable water supply (Correct answer)
- Rapid corrosion of copper pipes
- Reduced flow to high-demand fixtures
Correct answer: Contamination of the potable water supply
A cross-connection links potable water with a non-potable source, risking backflow of contaminants into the drinking water supply.
WALMART MAINTENANCE Plumbing and Facilities 3
A floor drain in a Walmart produce section is draining slowly.
What is the most likely cause?