Paved areas 139.305 and safety areas 139.309

Question 1

What are the two purposes airport pavements are designed and constructed?

Answer 1

to support the critical loads imposed on them, and to produce a smooth, skid-resistant, and safe-riding surface

Question 2

Flexible Pavement

Answer 2

tends to compress under load. Reflects the deformation of subgrade and the subsequent layers to the surface. grass, dirt, gravel, and asphalt

Question 3

Ridged Pavement

Answer 3

Resists compression under load. loads are distributed over a wide area of subgrade soil. normally uses Portland cement concrete

Question 4

the two major elements most contributing to pavement deterioration are?

Answer 4

effects of weathering, Loads imposed by aircraft

Question 5

PCN

Answer 5

Pavement classification number: the strength of pavement, in terms of the load-carrying capacity

Question 6

ACN

Answer 6

Airplane Classification Number: the effect of an individual airplane on different pavements using this number

Question 7

LCN

Answer 7

Load Classification Number: for pavements with lower bearing strengths, the naming convention uses the following codes for gear designation purposes
S-Single
D-Dual
T-Trippel
Q-Quadruple

Question 8

Flexible Pavement Distresses

Answer 8

Cracking, Disintegration, Distortion, Loss of skid resistance

Question 9

Ridged Pavement distresses

Answer 9

Cracking, Joint seal damage, Disintegration, Distortion, Loss of Skid resistance

Question 10

Hot-mix asphalt (HMA)

Answer 10

a blend of asphalt binder and well graded, high quality aggregates. they are mixed and placed while hot. used in construction of new airfield pavement and patching and overlay of pavements

Question 11

tack coat

Answer 11

a light application of emulsified asphalt applied to an exiting pavement to provide a bond with an overlaying course like HMA. its used on the sides of an existing pavement that has been cut vertically before application.

Question 12

crack filler material

Answer 12

hot-applied, for asphalt concrete an Portland cement concrete pavements

Question 13

Concrete

Answer 13

it is a blend of Portland cement, fine and coarse aggregate, and water, with or without additives. used to repair a distressed Portland cement concrete pavement so it may be used at its original designed capacity

Question 14

Skid resistance

Answer 14

the ability of a pavement to provide a surface with the desired friction characteristics under all weather conditions. it is affected by the polishing action of aircraft traffic and ground vehicles, contaminants on the pavement, fuel or other fluid spillage, rubber deposits, pavement texture, paint markings, and pavement abnormalities

Question 15

Dynamic Hydroplaning

Answer 15

Occurs on any surface. A wave of water builds up in front of the rolling tire, which allows the tire to ride on a cushion of water and lose contact with the runway surface

Question 16

Viscous Hydroplaning

Answer 16

occurs form the lubricating effect that results when a thin film of oil, grease, dirt, rubber particles or a smooth runway combine with water or other liquid, resulting in slippery pavement. it prevents a tire from making positive contact with the pavement, and it results in skidding. it can occur at lower speeds

Question 17

Rubber reversion hydroplaning

Answer 17

caused by the rubber heat buildup beneath a tire footprint due to friction. the heat causes the tire to revert to its uncured state and form a seal that traps high pressure superheated steam. primarily occurs during landing, and prevents a spin-up of the tire on touchdown

Question 18

how to treat surfaces to decrease hydroplaning

Answer 18

pavement grooving, a porous friction course, wire combing

Question 19

Ways to remove rubber

Answer 19

high-pressure water spray, chemical solvents, high-velocity abrasive impact techniques, mechanical grinding

Question 20

4 ways friction evaluations may be conducted

Answer 20

Decelerometers (DEC): spot check instead of a continuous graphic record. a minimum of 3 break tests per part of the runway

Electronic: automatically computing a nd reporting friction averages for each one-third of the runway. also provide a printed record. taken at 20mph

Mechanical: considered as only a backup to the first two. they require longer runway down time and don’t give a printed copy

Continuous Friction Measuring Equipment (CFME): Recommended for pavement surfaces covered with contaminants, as they provide a continuous graphic record of the pavement surface friction characteristics. may be self-contained or towed, taken at 40 mph

Question 21

Decelerometers (DEC):

Answer 21

spot check instead of a continuous graphic record. a minimum of 3 break tests per part of the runway

Question 22

Electronic friction evaluation

Answer 22

automatically computing a nd reporting friction averages for each one-third of the runway. also provide a printed record. taken at 20mph

Question 23

Mechanical friction evaluation

Answer 23

considered as only a backup to the first two. they require longer runway down time and don’t give a printed copy

Question 24

Continuous Friction Measuring Equipment (CFME)

Answer 24

Recommended for pavement surfaces covered with contaminants, as they provide a continuous graphic record of the pavement surface friction characteristics. may be self-contained or towed, taken at 40 mph

Question 25

A formal FOD management program addresses the following

Answer 25

1. Prevention: awareness, training and education, maintenance
2. Detection: operations, equipment
3. Removal: equipment, operations
4. Evaluation: data collection and analysis, continuous improvement

Question 26

FOD Equipment

Answer 26

Mechanical: power sweepers, vacuum systems, jet air blowers
non-mechanical: friction mat sweepers, magnetic bars, rumble strips

Question 27

distinction between moment and non-movement areas at airports is based on two factors

Answer 27

operation control, and FAA design standards

Question 28

When may a displaced threshold be required

Answer 28

When an object obstructs the airspace needed for landing, when there are environmental considerations such as noise abatement, and when runway safety area dimensions or obstacle-free area lengths are needed

Question 29

what is a major goal of taxiways

Answer 29

to maintain a smooth flow with a minimum number of points requiring a change in the airplane’s taxiing speed

Question 30

what is a major goal of aprons

Answer 30

the ready accommodation of either a changing or static mix of aircraft

Question 31

the main reasons for the use of artificial turf at airports are to…?

Answer 31

mitigate soil erosion, minimize maintenance and management of turf, enhance visual aesthetics