ASPHALT EXAM QUESTIONS AND
CORRECT ANSWERS
counter flow ✅✅ CORRECT ANSW-agg flows against the exhaust gases
most common counter flow facility ✅✅ CORRECT ANSW-double barrel
whats more common batch mix or drum mix ✅✅ CORRECT ANSW-drum mix
(T/F) The first 2 or 3 components of drum & batch mix are virtually the same ✅✅ CORRECT
ANSW-True
Primary difference btw batch vs drum mix ✅✅ CORRECT ANSW-the drying operation
Pugmill ✅✅ CORRECT ANSW-twin shaft counter rotating mixer
"RAP" ✅✅ CORRECT ANSW-Recycled Asphalt Pavement
Stripped old road, removed by a milling machine, added back into a new mix.
Drum Dwell time ✅✅ CORRECT ANSW-3-4 mins
As the Drum diameter increases..... ✅✅ CORRECT ANSW-the production rate increases
Flights? ✅✅ CORRECT ANSW-control movement of the Agg. inside drum
2 types of burners ✅✅ CORRECT ANSW-Forced air, Draft
Largest factor affecting the production rate of certain size drum ✅✅ CORRECT ANSW-Stockpile
Moisture Content
, % of roads asphalt paved ✅✅ CORRECT ANSW-96
Does asphalt need rebar ✅✅ CORRECT ANSW-no
_____ tons of asphalt made anually ✅✅ CORRECT ANSW-1/2 Billion
History of Asphalt ✅✅ CORRECT ANSW-first used in 1870's
asphalt lakes of Trinidad
petroleum asphalt took off
Asphalt ✅✅ CORRECT ANSW-soluble in petroleum, by product of petroleum distilation
Tar ✅✅ CORRECT ANSW-not soluble in petroleum, coke by product
Asphalt Binder ✅✅ CORRECT ANSW-called: bitumen or asphalt cement
black sticky stuff that glues everything together
Cutback ✅✅ CORRECT ANSW-Asphalt Binder cut with solvent
Emulsion ✅✅ CORRECT ANSW-Mixture of Binder, water and emulsifying agent
Superpave ✅✅ CORRECT ANSW-1990s SHRP contract, describes the mix design of asphalt
concrete
Mastic ✅✅ CORRECT ANSW-Asphalt Binder and sand portion
Equipment needed for HMA ✅✅ CORRECT ANSW-Facilities, trucks, placement equip, compaction
equip
Agg in Asphalt Cement ✅✅ CORRECT ANSW-blend of 2-4 stockpiles of materials
2 types of HMA facilities ✅✅ CORRECT ANSW-Batch Mix, Drum Mix
CORRECT ANSWERS
counter flow ✅✅ CORRECT ANSW-agg flows against the exhaust gases
most common counter flow facility ✅✅ CORRECT ANSW-double barrel
whats more common batch mix or drum mix ✅✅ CORRECT ANSW-drum mix
(T/F) The first 2 or 3 components of drum & batch mix are virtually the same ✅✅ CORRECT
ANSW-True
Primary difference btw batch vs drum mix ✅✅ CORRECT ANSW-the drying operation
Pugmill ✅✅ CORRECT ANSW-twin shaft counter rotating mixer
"RAP" ✅✅ CORRECT ANSW-Recycled Asphalt Pavement
Stripped old road, removed by a milling machine, added back into a new mix.
Drum Dwell time ✅✅ CORRECT ANSW-3-4 mins
As the Drum diameter increases..... ✅✅ CORRECT ANSW-the production rate increases
Flights? ✅✅ CORRECT ANSW-control movement of the Agg. inside drum
2 types of burners ✅✅ CORRECT ANSW-Forced air, Draft
Largest factor affecting the production rate of certain size drum ✅✅ CORRECT ANSW-Stockpile
Moisture Content
, % of roads asphalt paved ✅✅ CORRECT ANSW-96
Does asphalt need rebar ✅✅ CORRECT ANSW-no
_____ tons of asphalt made anually ✅✅ CORRECT ANSW-1/2 Billion
History of Asphalt ✅✅ CORRECT ANSW-first used in 1870's
asphalt lakes of Trinidad
petroleum asphalt took off
Asphalt ✅✅ CORRECT ANSW-soluble in petroleum, by product of petroleum distilation
Tar ✅✅ CORRECT ANSW-not soluble in petroleum, coke by product
Asphalt Binder ✅✅ CORRECT ANSW-called: bitumen or asphalt cement
black sticky stuff that glues everything together
Cutback ✅✅ CORRECT ANSW-Asphalt Binder cut with solvent
Emulsion ✅✅ CORRECT ANSW-Mixture of Binder, water and emulsifying agent
Superpave ✅✅ CORRECT ANSW-1990s SHRP contract, describes the mix design of asphalt
concrete
Mastic ✅✅ CORRECT ANSW-Asphalt Binder and sand portion
Equipment needed for HMA ✅✅ CORRECT ANSW-Facilities, trucks, placement equip, compaction
equip
Agg in Asphalt Cement ✅✅ CORRECT ANSW-blend of 2-4 stockpiles of materials
2 types of HMA facilities ✅✅ CORRECT ANSW-Batch Mix, Drum Mix
