DRIVER OPERATOR (Fire Apparatus) END
OF COURSE EXAM REVISION STUDY
QUESTIONS WITH ACCURATE SOLUTIONS
2025 EDITION.
Determine the TPL for a hose assembly in which 400 feet of 5-inch hose is
wide into one 200-foot section of 2 ½-inch hose and one 300-foot section
of 2 ½-inch hose. Each attack hose is flowing at 200 GPM
A. 19 psi
B. 29 psi
C. 39 psi (Correct Answer)
D. 54 psi
FL (Supply) = C x (Q/100)² x (L/100)
FL (Supply) = 0.08 x (400/100)² x (400/100)
FL (Supply) = 0.08 x (4)² x 4
FL (Supply) = 0.08 x 16 x 4
FL (Supply) = 5.12
FL (Attack 1) = C x (Q/100)² x (L/100)
FL (Attack 1) = 2 x (200/100)² x (200/100)
FL (Attack 1) = 2 x (2)² x 2
FL (Attack 1) = 2 x 4 x 2
FL (Attack 1) = 16
,FL (Attack 2) = C x (Q/100)² x (L/100)
FL (Attack 2) = 2 x (200/100)² x (300/100)
FL (Attack 2) = 2 x (2)² x 3
FL (Attack 2) = 2 x 4 x 3
FL (Attack 2) = 24
TPL = (5.12 + 24 [Most demanding line]) + 0 + 10
TPL = 39.12
Using the hand method, the estimated friction loss for 300 feet of 2 ½-
inch hose at 200 GPM is approximately:
A. 18 psi
B. 24 psi (Correct Answer)
C. 36 psi
D. 48 psi
4 x 2 (200 GPM)
8 psi per 100 feet
8x3
24 psi total
A pumper has two 300-foot sections of 3-inch hoses with 2 ½-inch
couplings. They are siamesed into a 200 feet of 5-inch attack line. The
attack line that ends in a master stream with a flow of 350 GPM. Given
this hose layout, determine the total pressure loss for this hose assembly.
A. 19 psi
B. 22 psi
,C. 44 psi (Correct Answer)
D. 78 psi
FL (Siamesed) = C x (Q/100)² x (L/100)
FL (Siamesed) = .2 x (350/100)² x (300/100)
FL (Siamesed) = .2 x (3.5)² x 3
FL (Siamesed) = .2 x 12.25 x 3
FL (Siamesed) = 7.35
FL (Attack 1) = C x (Q/100)² x (L/100)
FL (Attack 1) = .08 x (350/100)² x (200/100)
FL (Attack 1) = .08 x (3.5)² x 2
FL (Attack 1) = .08 x 12.25 x 2
FL (Attack 1) = 1.96
TPL = FL + EL + APL
TPL = (7.35 + 1.96) + 0 + (10 [appliance] + 25 [master stream])
TPL = 9.31 + 0 + 10
TPL = 44.31
A quantity of 16.66 pounds of water equals:
A. 16.66 gal
B. 8.33 gal
C. 6.78 gal
D. 2.0 gal (Correct Answer)
, 1 gal = 8.35 lbs
16.66/8.35 = 1.99
Bouncing water off the inside walls of the nozzle bore to create a fog
pattern is called:
A. Periphery deflection (Correct Answer)
B. A broken stream
C. An impinging stream
D. A deluge stream
Each of these cups is filled with water to its top. Identify the cup with the
least amount of pressure per square inch at the bottom of the liquid.
C
If you need to draft from a static water source, your primary consideration
should be the:
A. distance from the fire scene
B. Type of water
C. Amount of required lift (Correct Answer)
D. Direction of approach
When controlling pump valves, push-pull handles:
OF COURSE EXAM REVISION STUDY
QUESTIONS WITH ACCURATE SOLUTIONS
2025 EDITION.
Determine the TPL for a hose assembly in which 400 feet of 5-inch hose is
wide into one 200-foot section of 2 ½-inch hose and one 300-foot section
of 2 ½-inch hose. Each attack hose is flowing at 200 GPM
A. 19 psi
B. 29 psi
C. 39 psi (Correct Answer)
D. 54 psi
FL (Supply) = C x (Q/100)² x (L/100)
FL (Supply) = 0.08 x (400/100)² x (400/100)
FL (Supply) = 0.08 x (4)² x 4
FL (Supply) = 0.08 x 16 x 4
FL (Supply) = 5.12
FL (Attack 1) = C x (Q/100)² x (L/100)
FL (Attack 1) = 2 x (200/100)² x (200/100)
FL (Attack 1) = 2 x (2)² x 2
FL (Attack 1) = 2 x 4 x 2
FL (Attack 1) = 16
,FL (Attack 2) = C x (Q/100)² x (L/100)
FL (Attack 2) = 2 x (200/100)² x (300/100)
FL (Attack 2) = 2 x (2)² x 3
FL (Attack 2) = 2 x 4 x 3
FL (Attack 2) = 24
TPL = (5.12 + 24 [Most demanding line]) + 0 + 10
TPL = 39.12
Using the hand method, the estimated friction loss for 300 feet of 2 ½-
inch hose at 200 GPM is approximately:
A. 18 psi
B. 24 psi (Correct Answer)
C. 36 psi
D. 48 psi
4 x 2 (200 GPM)
8 psi per 100 feet
8x3
24 psi total
A pumper has two 300-foot sections of 3-inch hoses with 2 ½-inch
couplings. They are siamesed into a 200 feet of 5-inch attack line. The
attack line that ends in a master stream with a flow of 350 GPM. Given
this hose layout, determine the total pressure loss for this hose assembly.
A. 19 psi
B. 22 psi
,C. 44 psi (Correct Answer)
D. 78 psi
FL (Siamesed) = C x (Q/100)² x (L/100)
FL (Siamesed) = .2 x (350/100)² x (300/100)
FL (Siamesed) = .2 x (3.5)² x 3
FL (Siamesed) = .2 x 12.25 x 3
FL (Siamesed) = 7.35
FL (Attack 1) = C x (Q/100)² x (L/100)
FL (Attack 1) = .08 x (350/100)² x (200/100)
FL (Attack 1) = .08 x (3.5)² x 2
FL (Attack 1) = .08 x 12.25 x 2
FL (Attack 1) = 1.96
TPL = FL + EL + APL
TPL = (7.35 + 1.96) + 0 + (10 [appliance] + 25 [master stream])
TPL = 9.31 + 0 + 10
TPL = 44.31
A quantity of 16.66 pounds of water equals:
A. 16.66 gal
B. 8.33 gal
C. 6.78 gal
D. 2.0 gal (Correct Answer)
, 1 gal = 8.35 lbs
16.66/8.35 = 1.99
Bouncing water off the inside walls of the nozzle bore to create a fog
pattern is called:
A. Periphery deflection (Correct Answer)
B. A broken stream
C. An impinging stream
D. A deluge stream
Each of these cups is filled with water to its top. Identify the cup with the
least amount of pressure per square inch at the bottom of the liquid.
C
If you need to draft from a static water source, your primary consideration
should be the:
A. distance from the fire scene
B. Type of water
C. Amount of required lift (Correct Answer)
D. Direction of approach
When controlling pump valves, push-pull handles:
