Pump Ops Chap 16 to Chap 20

Question 1

According to NFPA® 1901, what is the minimum required flow rate for a fog curtain nozzle under an elevating platform?

Answer 1

Must flow at least 75 gpm (300 L/min)

Question 2

What type of nozzle movement restriction exists for detachable ladder pipe systems?

Answer 2

Movement usually restricted to 15° either side of center

Question 3

What pressure range is typical for hydraulic fluid in aerial hoisting cylinders?

Answer 3

850 to 3,000 psi (5 950 kPa to 21 000 kPa)

Question 4

What are the three basic categories of aerial devices as defined by NFPA® 1901?

Answer 4

Aerial Ladders, Elevating Platforms, Water Towers

Question 5

What material advantage do aerial ladder trusses provide?

Answer 5

Lighter than a solid beam with equivalent strength

Question 6

What key safety feature is integrated in modern hoisting cylinders?

Answer 6

Integral safety valves that lock and hold oil in the cylinder during a leak/blowout

Question 7

What are the required safety gates on elevating platforms per NFPA®?

Answer 7

Two gates for access/egress below top railing

Question 8

What is the minimum internal diameter for telescoping waterway systems?

Answer 8

4 inches (100 mm)

Question 9

What NFPA® standard must aerial apparatus comply with for breathing air systems?

Answer 9

NFPA® 1989: Standard on Breathing Air Quality for Emergency Services Respiratory Protection

Question 10

What are the working heights for North American aerial ladders?

Answer 10

50–137 ft (15 m to 40 m)

Question 11

How far must aerial devices stay away from overhead power lines energized between 600 and 50,000 volts?

Answer 11

At least 10 feet (3 m)

Question 12

How far must aerial devices stay from high-voltage transmission lines over 50,000 volts?

Answer 12

At least 50 feet (15 m)

Question 13

What is the OSHA clearance requirement for power lines under 350 kilovolts?

Answer 13

20 feet (6 m)

Question 14

What is the clearance requirement for power lines over 350 kilovolts under OSHA standards?

Answer 14

50 feet (15 m)

Question 15

How far can electricity arc from a power line?

Answer 15

Up to 10 feet (3 m)

Question 16

What angle provides the greatest jackknifing stability for tillered aerial apparatus?

Answer 16

60° from inline with the aerial extended away

Question 17

What distance should additional apparatus be placed behind a main unit on highways for buffer?

Answer 17

150 to 200 feet (45–60 m)

Question 18

What is the required clearance above railroad tracks for aerial operation when confirmed safe?

Answer 18

At least 25 feet (7.5 m)

Question 19

What distance should aerial apparatus be parked away from railroad tracks?

Answer 19

At least 25 feet (7.5 m)

Question 20

What is the optimal angle for unsupported aerial device loading?

Answer 20

70° to 80° from horizontal

Question 21

What angle is considered the maximum for tractor-trailer stability during jackknifing?

Answer 21

60 degrees from the centerline of the trailer

Question 22

What is the minimum lateral grade correction most apparatus can manage?

Answer 22

Up to 5 percent (≈ 3 degrees)

Question 23

What size are standard stabilizer pads used under aerial apparatus?

Answer 23

24 x 24 inches (600 mm x 600 mm)

Question 24

What is the recommended method to measure the travel path of stabilizers before deployment?

Answer 24

Use a short pike pole, arm span, or closet hook

Question 25

Why should only multi-step deployment be used for stabilizers?

Answer 25

Single full deployment on one side can damage the chassis, torque box, or axles

Question 26

What grade type is harder to correct: lateral or longitudinal?

Answer 26

Longitudinal grade

Question 27

What slope corresponds to a 5% lateral grade?

Answer 27

Rise of 5 feet per 100 feet (1.5 m per 30 m)

Question 28

Why is operating the aerial over the uphill side preferred on grades?

Answer 28

It offers more stability and minimizes lateral and torsional stress

Question 29

What distance of incline should be avoided when deploying stabilizers on curbs or sidewalks?

Answer 29

Any non-level surface or load-bearing uncertainty should be avoided

Question 30

What PSI range is needed for pneumatic PTO systems?

Answer 30

50–140 psi (350–980 kPa)

Question 31

How far should an aerial device remain from power lines of unknown voltage?

Answer 31

At least 50 feet (15 m)

Question 32

What minimum distance must be maintained from power lines ≤350kV?

Answer 32

10 feet (3 m) or ideally 20 feet (6 m)

Question 33

What angle should the aerial ladder be operated at when using the 75-80-80 guideline?

Answer 33

75° elevation

Question 34

What is the recommended aerial ladder extension under the 75-80-80 guideline?

Answer 34

80% of full extension

Question 35

What is the target nozzle pressure in the 75-80-80 guideline?

Answer 35

80 psi (560 kPa)

Question 36

What wind speed requires caution due to trees moving and walking difficulty?

Answer 36

32–38 mph (51–61 km/h)

Question 37

What is the maximum allowable ice thickness on an aerial device per NFPA® 1901?

Answer 37

1/4 inch (6 mm)

Question 38

How much does 1 cubic inch of ice weigh?

Answer 38

0.03 lb (0.01 kg)

Question 39

When operating on icy surfaces, how should the aerial device be aligned?

Answer 39

In line with the apparatus chassis

Question 40

What distance must an aerial device avoid operating near fire streams or overspray?

Answer 40

Avoid positioning where streams may strike or overspray on the device

Question 41

How far should the aerial ladder tip extend above the roofline during rescue operations?

Answer 41

At least 6 feet (2 m)

Question 42

Where should the platform floor be positioned when performing a roof rescue?

Answer 42

Just above and over the edge of the roof

Question 43

How should the aerial be positioned when approaching a victim for rescue?

Answer 43

Aim above the victim, then lower to prevent jumping or sudden movements

Question 44

What should the first rung of the aerial ladder align with during a window rescue?

Answer 44

Even with the windowsill

Question 45

At what angle should a master stream enter a window during a blitz attack for ceiling deflection?

Answer 45

Approximately 30 degrees

Question 46

How much weight does 250 gpm of water add to a structure?

Answer 46

2,000 pounds

Question 47

What guideline should be used for master stream operation from a ladder pipe?

Answer 47

75° elevation, 80% extension, 80 psi nozzle pressure

Question 48

Why should a ladder be placed at the corner of a building for rescue?

Answer 48

To reach two sides and reduce collapse hazard

Question 49

What is the recommended aerial device position for roof ventilation?

Answer 49

Unburned side, close to the ventilation area

Question 50

Why must fly sections extend 6 feet over the roof edge during ventilation?

Answer 50

To remain visible in smoke and ensure a clear escape route