Metro Engineers test questions &
answers graded A+
Valve on truck to prevent unwanted movement? - correct answer ✔✔ Counterbalance valve
Which ground stabilizers are placed on an aerial truck facing uphill? - correct answer ✔✔ Uphill
stabilizers
When spotting at an uphill approach with the truck where should the apparatus be positioned?
- correct answer ✔✔ Short of the building downhill
What is the angle for aerial water flow ops? - correct answer ✔✔ 75-80-80 75 deg for ops, 80psi
@80% of length 80/100ft
How do you position the aerial apparatus on a vaulted surface? - correct answer ✔✔ Stager
apparatus
Max windspeed aerial can be deployed? - correct answer ✔✔ 40mph or manufacturer recs
What direction to place aerial with wind? - correct answer ✔✔ Parallel
Ladder placement for roof ops? - correct answer ✔✔ 6" above roof line
Max loading for an unsupported aerial occurs at? - correct answer ✔✔ 70-80 deg
,On an aerial truck an unsupported beam spot should be at what height? - correct answer ✔✔ 4-
6 ft above the building
What is the degree when operating an aerial in a jackknife position? - correct answer ✔✔
Optimal 60, but 60-90, past 90 deg stability decreases
How long of an interval can the aux hydraulic pump be operated on the truck? - correct answer
✔✔ Used in an emergency failure for the main, 1 min increments due to overheating.
What grade can you correct aerial lateral side to side on uneven terrain? - correct answer ✔✔
5deg so 5/100' rise to run operate over the high side.
What grade is optimal for a longitudinal unevenness on the truck? - correct answer ✔✔ 6-14%
operate directly over the front or back.
A fully extended working length for an aerial apparatus in North America per NFPA 1901? -
correct answer ✔✔ 50-137' measured from the ground to the highest rung.
Considerations for operating the aerial near power lines? - correct answer ✔✔ 10ft for voltage -
600-50,000, 50ft for voltage greater than 50,000
Where do you spot the truck for medium rise or high rise attack? - correct answer ✔✔ <5
stories outside pumper, >5 stories inside the pumper.
Greatest stability for working off an aerial? - correct answer ✔✔ Working off a longitudinal axis.
Best truck placement when working on a hill? - correct answer ✔✔ Downhill position and place
ladder longitudinaly uphill.
, Max percentage an aerial should not exceed? - correct answer ✔✔ 70-80deg will full load
capacity, 90deg in 120 seconds per NFPA 1901.
What is the gear box under the aerial platform? - correct answer ✔✔ Torque box.
What are the locks that hold the aerial ladder from retracting? - correct answer ✔✔ Fly locks.
What is the aerial placement for a blitz aerial attack? - correct answer ✔✔ Fly with turntable in-
line with target, water hitting the ceiling at 30deg, flow only to darken down.
What NFPA requirements for aerial breathing systems? - correct answer ✔✔ Not required by
NFPA, but if I'm place there must be two systems for two FFs, 400cu of air, tested annually, and
have a low air alarm at 20%.
How are aerials tested? - correct answer ✔✔ Non-destructive testing every 5 years, post
accident, or if subjected to unusual stress. Service test yearly.
What is a selector valve on an aerial? - correct answer ✔✔ Also known as the transfer valve,
directs hydraulic fluid to the stabilizer controls valve or the aerial device control valve.
What is the ladder water pipes horizontal sweep side to side? - correct answer ✔✔ 15deg either
side or 30deg total.
What are min quint requirements? - correct answer ✔✔ Aerial ladder, ground ladder, water
tank at least 300gal, a pumper, hose, 1000gpm pump, per NFPA 1901.
Min pumper requirements per NFPA 1901? - correct answer ✔✔ Min 300 gal water, and
750gpm pump.
answers graded A+
Valve on truck to prevent unwanted movement? - correct answer ✔✔ Counterbalance valve
Which ground stabilizers are placed on an aerial truck facing uphill? - correct answer ✔✔ Uphill
stabilizers
When spotting at an uphill approach with the truck where should the apparatus be positioned?
- correct answer ✔✔ Short of the building downhill
What is the angle for aerial water flow ops? - correct answer ✔✔ 75-80-80 75 deg for ops, 80psi
@80% of length 80/100ft
How do you position the aerial apparatus on a vaulted surface? - correct answer ✔✔ Stager
apparatus
Max windspeed aerial can be deployed? - correct answer ✔✔ 40mph or manufacturer recs
What direction to place aerial with wind? - correct answer ✔✔ Parallel
Ladder placement for roof ops? - correct answer ✔✔ 6" above roof line
Max loading for an unsupported aerial occurs at? - correct answer ✔✔ 70-80 deg
,On an aerial truck an unsupported beam spot should be at what height? - correct answer ✔✔ 4-
6 ft above the building
What is the degree when operating an aerial in a jackknife position? - correct answer ✔✔
Optimal 60, but 60-90, past 90 deg stability decreases
How long of an interval can the aux hydraulic pump be operated on the truck? - correct answer
✔✔ Used in an emergency failure for the main, 1 min increments due to overheating.
What grade can you correct aerial lateral side to side on uneven terrain? - correct answer ✔✔
5deg so 5/100' rise to run operate over the high side.
What grade is optimal for a longitudinal unevenness on the truck? - correct answer ✔✔ 6-14%
operate directly over the front or back.
A fully extended working length for an aerial apparatus in North America per NFPA 1901? -
correct answer ✔✔ 50-137' measured from the ground to the highest rung.
Considerations for operating the aerial near power lines? - correct answer ✔✔ 10ft for voltage -
600-50,000, 50ft for voltage greater than 50,000
Where do you spot the truck for medium rise or high rise attack? - correct answer ✔✔ <5
stories outside pumper, >5 stories inside the pumper.
Greatest stability for working off an aerial? - correct answer ✔✔ Working off a longitudinal axis.
Best truck placement when working on a hill? - correct answer ✔✔ Downhill position and place
ladder longitudinaly uphill.
, Max percentage an aerial should not exceed? - correct answer ✔✔ 70-80deg will full load
capacity, 90deg in 120 seconds per NFPA 1901.
What is the gear box under the aerial platform? - correct answer ✔✔ Torque box.
What are the locks that hold the aerial ladder from retracting? - correct answer ✔✔ Fly locks.
What is the aerial placement for a blitz aerial attack? - correct answer ✔✔ Fly with turntable in-
line with target, water hitting the ceiling at 30deg, flow only to darken down.
What NFPA requirements for aerial breathing systems? - correct answer ✔✔ Not required by
NFPA, but if I'm place there must be two systems for two FFs, 400cu of air, tested annually, and
have a low air alarm at 20%.
How are aerials tested? - correct answer ✔✔ Non-destructive testing every 5 years, post
accident, or if subjected to unusual stress. Service test yearly.
What is a selector valve on an aerial? - correct answer ✔✔ Also known as the transfer valve,
directs hydraulic fluid to the stabilizer controls valve or the aerial device control valve.
What is the ladder water pipes horizontal sweep side to side? - correct answer ✔✔ 15deg either
side or 30deg total.
What are min quint requirements? - correct answer ✔✔ Aerial ladder, ground ladder, water
tank at least 300gal, a pumper, hose, 1000gpm pump, per NFPA 1901.
Min pumper requirements per NFPA 1901? - correct answer ✔✔ Min 300 gal water, and
750gpm pump.
