Bitumen is the product of the fractional distillation process of crude petroleum
ID: 1829083 • Letter: B
Question
Bitumen is the product of the fractional distillation process of crude petroleum
(A) with the highest molecular weight.
(B) with the smallest molecular weight.
(C) with an average molecular weight.
(D) none of the above.
1.2 The Bending Beam Rheometer test is used to measure
(A) asphalt binder stiffness at high temperature
(B) asphalt binder stiffness at intermediate temperature
(C) asphalt binder stiffness at low temperature
(D) asphalt binder ductility at low temperature
1.3 The Pressure Aging Vessel (PAV) test simulates
(A) asphalt aging during compaction
(B) asphalt aging during mixing and construction
(C) asphalt aging during 2 to 4 years in service
(D) asphalt aging during 7 to 10 years in service
1.4 Fatigue cracking in HMA pavements takes place at
(A) low pavement temperature
(B) intermediate pavement temperature
(C) high pavement temperature
(D) none of the above
1.5 HMA mixtures are compacted (according to what you learn in the lab)
(A) at a temperature higher than the mixing temperature
(B) at the same mixing temperature
(C) always at the temperature of 230?F
(D) none of the above
1.6 At low temperature asphalt cements are
(A) stiff and plastic.
(B) soft and elastic
(C) stiff and less plastic
(D) soft and more plastic
1.7 A material with a phase angle ? of 90 degrees is
(A) an elastic material.
(B) a visco-elastic material.
(C) a plastic material.
(D) a brittle material.
1.8 At the high performance temperature of an asphalt binder it is required to have
(A) a low G* and a high ?.
(B) a low G* and a low ?.
(C) a high G* and a high ?.
(D) a high G* and a low ?.
1.9 The Direct Tension (DT) test is used to
(A) check asphalt ductility at low temperature.
(B) measure asphalt stiffness at high temperature.
(C) measure asphalt stiffness at intermediate temperature.
(D) measure asphalt stiffness at low temperature.
1.10 Voids in the Mineral Aggregates (VMA) are
(A) the voids filled with asphalt.
(B) the absorbed asphalt volume.
(C) the sum of air voids and absorbed asphalt volume.
(D) the sum of air voids and effective asphalt volume
1.11 The %Gmm required at Nmax in Superpave mix design is
(A) greater than 2%
(B) equal to 4%
(C) less than 98%
(D) equal to 96%
1.12 Permanent deformation in HMA pavements takes place at
(A) low pavement temperature
(B) intermediate pavement temperature
(C) high pavement temperature
(D) none of the above
(Can someone help me to find the right answer)
Explanation / Answer
c
d
a
d
b
a
b
b
d
a
c
a
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