FAE (Fire Apparatus Engineer) Illinois ACCURATE TESTED VERSIONS OF THE EXAM FROM 2025 TO 2026 | ACCURATE AND VERIFIED ANSWERS | NEXT GEN FORMAT | GUARANTEED PASSWITH 150+ QUESTIONS

1. A grid arrangement of smaller mains serving the individual fire hydrants and blocks of consumers is known as: A. Primary mains B. Transmission mains C. Distributors D. Trunk lines Correct Answer: C. Distributors Rationale: Distributors are the smaller water mains that branch off from larger mains to directly serve hydrants and local blocks. 2. The network of mains that make up a distribution system and consist of primary, secondary, and distributor mains is called: A. Radial system B. Grid C. Branch system D. Loop system Correct Answer: B. Grid Rationale: A grid system interconnects mains at multiple points and allows for redundancy and reliability in water supply. 3. The concept of "One gallon in, one gallon out" refers to: A. Centrifugal pumps B. Booster pumps C. Jet pumps D. Positive Displacement Pumps Correct Answer: D. Positive Displacement Pumps Rationale: Positive displacement pumps move a fixed amount of fluid per cycle, ensuring precise flow—"one in, one out." 4. A pump that discharges on the forward stroke and refills on the return stroke is called a: A. Rotary pump B. Jet pump C. Piston Pump D. Impeller pump Correct Answer: C. Piston Pump Rationale: Piston pumps function through a reciprocating action, with single or double action designs for fluid movement. 5. Simplest design pump used in the 17th century and adapted to steamers is: A. Jet pump B. Impeller pump C. Rotary pumps D. Axial pump Correct Answer: C. Rotary pumps Rationale: Rotary pumps like gear and vane types were among the first used in early firefighting technology. 6. A positive displacement pump with two meshing gears in a watertight case is a: A. Vane pump B. Rotary Vane pump C. Impeller pump D. Rotary Gear pump Correct Answer: D. Rotary Gear pump Rationale: Rotary gear pumps utilize the meshing of gears to move fluid, with capacity dependent on gear pocket size and speed. 7. A rotary pump with a rotor mounted off-center and vanes that slide out to maintain contact is a: A. Rotary Gear pump B. Rotary Vane pump C. Jet pump D. Centrifugal pump Correct Answer: B. Rotary Vane pump Rationale: Rotary vane pumps are ideal for priming due to their self-adjusting vanes that create a vacuum. 8. Which of the following is an advantage of positive displacement pumps? A. Pulsing discharge B. Prone to cavitation C. Self-priming D. Requires high incoming pressure Correct Answer: C. Self-priming Rationale: Positive displacement pumps can draw water on their own without needing to be primed externally. 9. Which is a disadvantage of positive displacement pumps? A. No pulsing B. Cannot pump air C. Susceptible to slippage and wear D. Uses incoming pressure Correct Answer: C. Susceptible to slippage and wear Rationale: These pumps can suffer from wear of internal components, leading to inefficiency and reduced capacity. 10. Which of the following are parts of a centrifugal pump? A. Only the impeller B. Only the volute and casing C. Casing, shroud, vanes, impeller, volute, eye, hub, stripping edge, discharge D. Gears and vanes Correct Answer: C Rationale: A centrifugal pump is made of multiple components, each contributing to flow and pressure conversion. 11. Which of the following are parts of an impeller? A. Casing and hub B. Vanes, hub, bore, eye, shroud C. Stripping edge and discharge D. Volute and eye only Correct Answer: B Rationale: These are key parts of an impeller that help direct and move fluid within the pump. 12. The part of a centrifugal pump that collects water and converts velocity to pressure is the: A. Volute B. Eye C. Casing D. Hub Correct Answer: C. Casing Rationale: The casing encloses the impeller and channels water for pressure generation and discharge. 13. What allows for an increase in discharge volume by increasing the area in a pump casing? A. Eye B. Shroud C. Volute D. Hub Correct Answer: C. Volute Rationale: The volute is a gradually widening passage that helps convert velocity to pressure and directs flow. 14. What directs water into discharge piping and prevents swirling around the impeller? A. Vanes B. Stripping Edge C. Bore D. Shroud Correct Answer: B. Stripping Edge Rationale: The stripping edge ensures efficient flow by preventing turbulence near the impeller. 15. Which of the following describes a single-stage centrifugal fire pump? A. Has two impellers B. Limited to 750 GPM if single intake C. Requires a transfer valve D. Delivers water through series mode Correct Answer: B Rationale: Single-stage pumps are simpler, with one impeller, and are limited in capacity with a single intake. 16. The most common fire pump with two impellers on a single shaft is called: A. Single-stage centrifugal B. Two Stage Centrifugal Pump C. Rotary vane pump D. Transfer pump Correct Answer: B Rationale: Two-stage pumps are standard in fire service, offering flexibility in pressure and volume modes. 17. NFPA 1500 refers to: A. Fire hydrant specifications B. Inspection of emergency vehicles C. Fire Department Occupational Safety and Health Program D. Firefighter training curriculum Correct Answer: C Rationale: NFPA 1500 outlines safety and health standards for emergency service organizations.