AAAE ACE Operations Module 2 (2022/2023) (Verified Answers)

AAAE ACE Operations Module 2 (2022/2023) (Verified Answers) What are the two major categories of pavement? Flexible and rigid What are some types of flexible pavement? Grass, dirt, gravel and asphalt Why are paved surfaces necessary at airports? To support the critical loads imposed on them; to produce a smooth, skid-resistant and safe-riding surface Airport surfaces are distinguished by operational control and FAA design standards into what two areas? Movement and non-movement What constitutes the movement area on an airport? Runways and taxiways. At ATCT controlled airports, the surfaces under ATC control. These areas must meet Part 139 design restrictions. What constitutes the non-movement area of an airport? Taxiways and aprons not under ATCT control How are movement and non-movement areas determined at an airport with an ATCT? By Letter of Agreement (LOA) between the airport and the ATCT. What is the benefit of using a rigid pavement such as Portland Cement Concrete? It is about half the lifetime cost of asphalt, with a service life of 30+ years versus 5-15 years for asphalt. Concrete is more expensive up front though, so asphalt is common at low revenue airports such as GA. What are two major elements that make pavements deteriorate? weathering and aircraft loads For bearing strengths of 12,500lbs or greater, what method is used to express the effect of an individual aircraft on different pavements? Comparing ACN to PCN (Aircraft Classification Number-Pavement Classification Number) What does the Pavement Classification Number (PCN) represent to the operator/pilot? PCN is the maximum pavement bearing strength for unrestricted aircraft operations. What is the Load Classification Number (LCN) used to describe? Pavement bearing strengths less than 12,500lbs What are the five major categories of pavement distress? cracking, joint seal damage, disintegration, distortion, loss of skid resistance Edges of abutting pavement or pavement and other areas must be no more than how many inches in elevation difference? 3 inches What are the maximum dimensions of a hole that are allowed by Part 139? Any hole with a diameter greater than 5 inches and either 3 inches deep or a slope of greater than 45 degrees How far are landing distances increased on wet pavement? By 15 percent or more What are the three types of hydroplaning? Dynamic, viscous, and rubber reversion What are three pavement elements that help to mitigate hydroplaning? pavement grooving, porous friction course, wire combing At what point should rubber removal occur on a runway? Based on a friction evaluation, frequency of turbo-jet landings, or when 40% of the grooves are 1/8'' or less in depth or width for a distance of 1,500ft What is the normal depth and spacing of pavement grooving? 1/4'' deep, 1/4" wide, 1.5"apart What are four rubber removal techniques? high-pressure water, chemical solvents, high-velocity abrasive, mechanical grinding When using a mechanical or electronic decelerometer to spot check pavement friction, how many values are required to survey a runway and the check is conducted at what speed? 3 values in each third of the runway (9 total); 20mph How much of the runway should be checked when using continuous friction measuring equipment (CFME) to evaluate runway friction? full runway length; up to 40 mph Below