ASPHALT COMPREHENSIVE TEST PAPER
QUESTIONS AND SOLUTIONS VERIFIED
PREPARATION MATERIAL
●● Most cement plants are located at the quarry site to minimize
transport of raw materials (T/F).
Answer: T
●● Which of the raw materials will produce clinker?
Answer: Limestone, Iron Ore, Sand and Silica
●● The source of lime is typically ____ of the total raw materials by
volume.
Answer: 70-95%
●● Cement clinker is produced by grinding, blending and heating the
raw materials inside the kiln (T/F).
Answer: T
●● About ____ of cement now produced in the US comes from a dry
process plant.
Answer: 90%
,●● In cement production, wet process needs about ____ more energy
than dry process.
Answer: 45%
●● In a cement kiln, raw materials are heated at about ____ to produce
clinker.
Answer: 3000F
●● Heating only limestone and clay in the kiln can produce cement
clinker (T/F).
Answer: T
●● Calcination occurs in kiln to produce clinker (T/F).
Answer: T
●● Clinker is ground with gypsum (calcium sulfate) to produce cement
(T/F).
Answer: T
●● Gypsum absorbs water and prevents setting of C3A during shipment.
Without gypsum, cement would set before you could get concrete out of
the truck (T/F).
Answer: T
, ●● Which of two cements have special sulfate resistance?
Answer: Type II & V
●● In Portland Limestone cement (Type IL), 15% to 30% of the clinker
is replaced by uncalcinated limestone, ground with the clinker and
gypsum (T/F).
Answer: F
●● Which one is not a supplementary cementitious material
Answer: Quick Lime
●● 3CaO*SiO2 (tricalcium silicate) is expressed as
Answer: C3S
●● The four major components in the clinker are C3S, C2S, C3A, and
C4AF (T/F).
Answer: T
●● Which of the following statements is not correct: C3S is responsible
for early strength, C3S controls permeability, C2S causes strength gain
beyond 7 days, increased C3A tends to increase hydration heat, C4AF
reduces clinkering temperature
Answer: C3s controls permeability & increased C3A tends to increase
hydration heat
QUESTIONS AND SOLUTIONS VERIFIED
PREPARATION MATERIAL
●● Most cement plants are located at the quarry site to minimize
transport of raw materials (T/F).
Answer: T
●● Which of the raw materials will produce clinker?
Answer: Limestone, Iron Ore, Sand and Silica
●● The source of lime is typically ____ of the total raw materials by
volume.
Answer: 70-95%
●● Cement clinker is produced by grinding, blending and heating the
raw materials inside the kiln (T/F).
Answer: T
●● About ____ of cement now produced in the US comes from a dry
process plant.
Answer: 90%
,●● In cement production, wet process needs about ____ more energy
than dry process.
Answer: 45%
●● In a cement kiln, raw materials are heated at about ____ to produce
clinker.
Answer: 3000F
●● Heating only limestone and clay in the kiln can produce cement
clinker (T/F).
Answer: T
●● Calcination occurs in kiln to produce clinker (T/F).
Answer: T
●● Clinker is ground with gypsum (calcium sulfate) to produce cement
(T/F).
Answer: T
●● Gypsum absorbs water and prevents setting of C3A during shipment.
Without gypsum, cement would set before you could get concrete out of
the truck (T/F).
Answer: T
, ●● Which of two cements have special sulfate resistance?
Answer: Type II & V
●● In Portland Limestone cement (Type IL), 15% to 30% of the clinker
is replaced by uncalcinated limestone, ground with the clinker and
gypsum (T/F).
Answer: F
●● Which one is not a supplementary cementitious material
Answer: Quick Lime
●● 3CaO*SiO2 (tricalcium silicate) is expressed as
Answer: C3S
●● The four major components in the clinker are C3S, C2S, C3A, and
C4AF (T/F).
Answer: T
●● Which of the following statements is not correct: C3S is responsible
for early strength, C3S controls permeability, C2S causes strength gain
beyond 7 days, increased C3A tends to increase hydration heat, C4AF
reduces clinkering temperature
Answer: C3s controls permeability & increased C3A tends to increase
hydration heat
