Certified Plumbing Contractor Quiz

Explanation
The statement is true because centrifugal wastewater pumps are designed to handle varying flow rates and can operate efficiently even when the discharge is restricted. These pumps have a robust impeller and casing design that allows them to handle high pressure and overcome restrictions in the discharge line. However, it is important to note that excessive restriction can lead to increased wear and tear on the pump and may affect its overall performance and lifespan.

Explanation
A pump operating at 23 feet of head will produce approximately 10 PSI because there is a direct relationship between head and pressure in a pump system. Head refers to the height that the pump needs to lift the fluid, and pressure is the force exerted by the fluid. As the height increases, so does the pressure. In this case, 23 feet of head corresponds to approximately 10 PSI of pressure. Therefore, the statement is true.

Explanation
Little Giant wastewater pumps are designed to be used continuously as long as they are operating within their performance curve. This means that they can run non-stop without overheating or experiencing any issues as long as they are functioning within their specified operating range. Therefore, the statement that most Little Giant wastewater pumps are rated continuous duty when operating on their performance curve is true.

Explanation
Little Giant wastewater pumps are rated up to 140 degrees F while utility pumps are generally rated up to 120 degrees F.

Explanation
CIA means Cast Iron Automatic so this model would have some type of switch.

Explanation
Sump pumps are designed to remove excess water from basements or crawl spaces. They usually have a screened inlet to prevent debris or solids from entering the pump and causing clogs or damage. This design feature ensures that the pump is suitable for non-solids handling applications, as it can effectively handle only liquid or water without any solid particles. Therefore, the statement "Sump pumps typically have a screened inlet and are designed for non-solids handling applications" is true.

Explanation
The "HT" wastewater pumps are rated up to 200 degrees F.

Explanation
A mechanical vent should NEVER be used with a Drainosaur package. The units must be vented to atmosphere.

Explanation
Little Giant's sump pumps are designed to dissipate heat from the motor more efficiently by pressing the motor stator into the cast iron housing. This design allows for better heat transfer, preventing the motor from overheating and ensuring its longevity. By pressing the motor stator into the cast iron housing, the heat generated by the motor can be effectively conducted and dissipated, maintaining optimal operating conditions for the pump. Therefore, the statement is true.

Explanation
The Oil Sensing Switch System is designed to PREVENT hydraulic liquid from being pumped into a gravity sewer system.

Explanation
Effluent pumps are specifically designed to handle wastewater that contains solids. These pumps are commonly used in septic systems, sump pits, and other applications where wastewater needs to be pumped away. The statement correctly states that effluent pumps typically have a restricted inlet and are designed to handle solids ranging from 1/2" to 3/4" in size. This restriction helps prevent larger solids from clogging the pump and ensures efficient operation. Therefore, the answer is true.

Explanation
Effluent pumps were designed to enhance the efficiency of traditional gravity type septic systems. This means that effluent pumps are specifically created to improve the performance and effectiveness of septic systems that rely on gravity for waste disposal. By using an effluent pump, the system can better handle and distribute the wastewater, ensuring that it flows properly and prevents any potential issues or backups. Therefore, the statement is true.

Explanation
In an "Enhanced Flow" STEP system the Operating Pressure is always zero.

Explanation
The statement is true because the Total Dynamic Head (TDH) in a "Low Pressure Pipe" STEP system is indeed a combination of the Static Head, Friction Head, and the Operating Pressure. The Static Head refers to the vertical distance between the water source and the discharge point, the Friction Head accounts for the resistance encountered by the water as it flows through the pipe, and the Operating Pressure is the pressure required to overcome this resistance and maintain the desired flow rate. Therefore, all three factors contribute to the TDH in a low-pressure pipe system.

Explanation
The statement suggests that the design of the motor bearings and the use of PSC motors contribute to the reliability of Little Giant effluent pumps. This implies that these features are carefully engineered and selected to ensure the pumps' durability and consistent performance. Therefore, it can be concluded that the statement is true.

Explanation
Little Giant sewage pumps typically have an open inlet, which means that they do not have a filter or screen to block solids from entering the pump. This design allows the pump to pass solids up to 2" in size, making it effective in pumping sewage and wastewater containing small debris. Therefore, the statement is true.

Explanation
The statement is true because when sizing a sewage pump, the pump capacity or flow required is determined by either the fixture unit method or the required scouring velocity flow of the system, whichever is greater. This means that the pump needs to be able to handle the flow rate required by the fixtures in the system or the flow rate needed to effectively clean the pipes, whichever is higher.

Explanation
In a typical sewage ejector application, there is no "operating pressure", only static and friction head.

Explanation
A typical sewage ejector package includes all the mentioned components: a sewage pump, float switch, basin with cover, and a check valve. These components work together to efficiently remove sewage from a building's plumbing system and pump it into a sewer or septic tank. The sewage pump is responsible for pumping the sewage, the float switch controls the pump's operation based on the water level in the basin, the basin with cover holds the sewage and prevents odors and debris from escaping, and the check valve prevents backflow of sewage into the system. Therefore, the statement is true.

Explanation
The Pit Plus Jr. basin has a 44 gallon rated capacity.

Explanation
The statement is true because alarms for sump and sewage systems are designed to notify the user when there is a high water condition in the basin. This is important because a high water level can indicate a potential overflow or malfunction in the system, which could lead to flooding or other issues. By alerting the user, they can take appropriate action to address the problem and prevent any damage or further complications.

Explanation
The "RS", air operated diaphragm switch is not rated for solids handling applications.

Explanation
When choosing a control panel, it is crucial to ensure that the amp range of the control panel aligns with the amp rating of the pump. This is because the control panel is responsible for regulating the electrical current that powers the pump. If the amp range of the control panel is not compatible with the amp rating of the pump, it can lead to electrical malfunctions, damage to the pump, or even safety hazards. Therefore, it is essential to match the amp range of the control panel with the amp rating of the pump to ensure proper functioning and prevent any potential issues.

Explanation
The "preferred" location for the alarm float is in the second uppermost position so that the alarm sounds before the lag pump is activated, alerting the owner that one of the pumps has a problem.

Explanation
When determining the required basin depth in a system located outside the home or business, it is important to consider the frost line of the area in which it is installed. This is because the frost line represents the depth at which the ground freezes during the winter. If the basin is not installed below the frost line, the freezing temperatures can cause the water in the basin to freeze, leading to potential damage to the system. Therefore, considering the frost line is crucial in determining the appropriate basin depth.

Explanation
Grinder pumps and pressure sewer systems are typically more economical to construct compared to gravity systems. This is because grinder pumps and pressure sewer systems require smaller pipe diameters and less excavation work, resulting in lower construction costs. Additionally, these systems can be installed in areas with challenging topography or where gravity systems are not feasible, further reducing construction expenses.

Explanation
Only the "Manual" or GP series grinders need a control panel. The "Automatic" or GPA series do not require a control panel for proper operation and third party approval.

Explanation
The patented Little Giant grinder cutter is designed so that the cutters can be removed WITHOUT removing the volute.

Explanation
The patented cutter system on the Little Giant grinders is designed in a way that it can maintain a separation of .002" between the rotating and stationary cutters. This precise separation allows for efficient cutting, as it ensures that the cutters are in close proximity to each other without touching. This prevents any unnecessary friction or damage to the cutters, resulting in efficient and effective cutting. Therefore, the statement is true.

Explanation
The automatic version of the LG grinder pump only includes the leg kit and pump switch. It does not include a guide rail adapter.