FAE Fire Apparatus Engineer Illinois Latest

FAE (Fire Apparatus Engineer) Illinois Latest Update 2024-2025 Exam 250 Questions and 100% Verified Correct Answers Guaranteed A+

-Simple Design -No Transfer valve -Single-stage impeller with single intake -Limited to 750 GPM -Single Stage Impeller with double intake

-High capacity pumps - 1,000 GPM and up - CORRECT ANSWER: Single Stage

Centrifugal Fire Pumps

-Tendency to pulse Fire streams.-As the piston or gears wear, water escapes from the discharge side of the pump reducing the capacity of the pump. (Slippage) -Contaminate water can quickly damage the pump.

-Does NOT USE incoming Pressure. - CORRECT ANSWER: Positive Displacement

Pumps (Disadvantages)

-Uses incoming pressure and adds to it.-Increases the capacity of the pump -Discharges can be shut down for short periods of time while pump is turning with no damage. (beware of heat.)

Delivers rated capacity at a higher NPP. - CORRECT ANSWER: Advantages of

Centrifugal pumps

.434 psi - CORRECT ANSWER: What is One foot of water exert as a back pressure?

"For every action there is an equal and opposite reaction" - CORRECT ANSWER: What is Newton's Third Law of motion pertaining to Nozzle Reaction?

(Simplest design- 1st used in 17th century) Adapted to the steamer in the 19th century.Silsby was the 1st to use it in 1856.

Rotary gear and Rotary vane - CORRECT ANSWER: Rotary pumps

1-1/4"= 400 GPM 1-3/8"= 500 GPM 1-1/2"= 600 GPM 1-5/8"= 700 GPM 1-3/4"= 800 GPM 1-7/8"= 900 GPM 2"= 1000 GPM

80 PSI FL for nozzle - CORRECT ANSWER: What is Master Stream Solid Stream GPM

for tips? 1 / 3

1. 2 Hour: 100% @ 150 psi

2. 1/2 hour: 70% @ 200 psi

3. 1/2 hour: 50% @ 250 psi

• 10 minutes: 100% @ 165 psi (overload or spurt test) - CORRECT ANSWER: What

are all the steps in Certification Test (pre-service tests)?

1. 20 minutes: 100% @ 150 psi

2. 10 minutes: 70 % @ 200 psi

3. 10 minutes: 50% @ 250 psi

Optional: 100% @ 165 psi (overload or spurt test) - CORRECT ANSWER: What are all the steps in a Service Test?

• Air Resistance
• Gravity - CORRECT ANSWER: What are the two variables that affect the reach of

fire streams?

• FL varies directly with the quantity of water flowing.

-( the larger the quantity the higher the FL-Same size hose.)

• FL varies directly with the size of the hose.

-(the larger the hose the lower the FL-same quantity.)

• FL varies directly with the length of the hose.

-(the longer the hose the higher the FL-same quantity.)

• FL will stay the same regardless of the pressure as long as the flow is the same. -

CORRECT ANSWER: 4 Hydraulic Laws of Friction

1.13 feet of lift - CORRECT ANSWER: How high does One inch (1") mercury (inches in vacuum) lift?

1.728 cubic inches - CORRECT ANSWER: What does One cubic foot of water contain

in inches?

1"= 200 GPM 1-1/8"= 250 GPM 1-1/4"= 300 GPM

50 PSI FL for nozzle - CORRECT ANSWER: What is Hand Lines Solid Stream GPM for

tips?

10 psi - CORRECT ANSWER: What is the recommended minimum psi that should be

maintained on the compound gauge when taking water from a hydrant?

10% to 15% - CORRECT ANSWER: What percent can head and tail winds affect the

reach of a stream?

100 psi - CORRECT ANSWER: What is Fog nozzle pressure for Hand held nozzle and

Master Stream? 2 / 3

100% @ 165 psi (done in certification test for 10 minutes) - CORRECT ANSWER: What is a Spurt or Overload test?

100% capacity @ 150 psi net pump pressure 70% capacity @ 200 psi net pump pressure

50% capacity @ 250 psi net pump pressure - CORRECT ANSWER: What are Pump

Tests?

14.7 psi - CORRECT ANSWER: What is atmospheric pressure at sea level?

2.304 feet - CORRECT ANSWER: How high will One psi elevate water?

200 GPM= 0.3 psi 300 GPM= 0.6 psi 400 GPM= 1.0 psi 500 GPM= 1.6 psi 600 GPM= 2.3 psi 700 GPM= 3.1 psi 800 GPM= 4.0 psi 900 GPM= 5.1 psi 1000 GPM= 6.3 psi - CORRECT ANSWER: What is 5" hose friction loss per 100'(feet)?

200 GPM= 1.0 psi 300 GPM= 2.1 psi 400 GPM= 3.6 psi 500 GPM= 5.5 psi 600 GPM= 7.8 psi 700 GPM= 10.5 psi 800 GPM= 13.6 psi 900 GPM= 17.1 psi

1000 GPM= 21.0 psi - CORRECT ANSWER: What is 4" hose Friction Loss per

100'(feet)?

200 GPM= 10psi 300 GPM= 21 psi 400 GPM= 36 psi (RED LINE) 500 GPM= 55 psi 600 GPM= 78 psi 700 GPM= 105 psi 800 GPM= 136 psi 900 GPM= 171 psi

1000 GPM= 210 psi - CORRECT ANSWER: What is 2-1/2" hose Friction loss per

100'(feet)?

200 GPM= 4.0 psi

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