NFPA Updated CFPS Exam Questions and Answers by iga

According to NFPA 13, Table 17.4.2.1 (a), the maximum distance between hangers for an automatic fire sprinkler system for a threaded lightwall steel pipe of 2 in. diameter is 10 ft. This is done to ensure that there are not long stretches of unsecured piping that could sag, leak, or break. The distance between hangers may vary depending on the type of pipe, the type of hanger, and the seismic design category of the building.References:NFPA 13, Table 17.4.2.1 (a);Hangers and Support of Sprinkler System Piping | NFPA | NFPA.

Zebra mussel

Explore

The correct answer is B. Zebra mussel pipe obstructions are largely concentrated around the Great Lakes and Mississippi River areas. Zebra mussels are an invasive species that originated from Eurasia and were introduced to North America in the late 1980s through the ballast water of ships. They have since spread to many freshwater lakes and rivers, especially in the Midwest and Northeast regions of the United States and Canada. Zebra mussels can attach themselves to hard surfaces, such as pipes, pumps, valves, and filters, and form dense colonies that reduce or block the water flow. This can cause serious problems for industries, utilities, and municipalities that rely on water intake or delivery systems.Zebra mussels can also damage aquatic ecosystems, infrastructure, and recreation by competing with native species, altering water quality, and fouling boats and equipment12345

Fire pump

Explore

A multistage centrifugal fire pump is defined as having two or more impellers on one shaft as a single unit. A multistage centrifugal pump is a type of centrifugal pump that uses multiple impellers to increase the pressure and flow of water.Each impeller acts like a single-stage pump within a chain of pumps, and the water passes through each impeller in series, gaining pressure and velocity at each stage1.A multistage centrifugal fire pump is used to provide high-pressure water for fire protection systems, especially in high-rise buildings or large industrial facilities2.A multistage centrifugal fire pump can be driven by an electric motor, a diesel engine, or a steam turbine3.References:

• Our Guide to Multistage Centrifugal Pumps | C&B Equipment
• Fire Pump Types | NFPA
• NFPA 20: Changes to the fire pump standard - Consulting