Construction Materials Exam #2
Questions with Correct Answers
A sample of aggregates with different sizes of particles is given to you. What sieve
would you need to separate this sample into the "coarse" part and the "fine" part? -
ANSWERS#4
NMAS - ANSWERSFirst sieve that accumlates
Geologically, all aggregates come from the three types of rocks: (choose all three) -
ANSWERS- Igneous
- Metamorphic
- Sedimentary
Aggregates are widely used in almost every Civil Engineering project. The top three
usages are (choose all three) - ANSWERS- as an underlying material for foundation
and pavements
- portland cement concrete
- hot mixed asphalt
Large aggregates are economically advantageous in Portland cement concrete and hot
mixed asphalt mainly because - ANSWERSlarge aggregates have less surface area
and therefore require less cement or asphalt
You were giving a sieve which has no label on it. You measured the sieve with a ruler
and found out that there are approximately 4 holes within every 1 inch distance. This
sieve most likely is sieve _______ - ANSWERS#4
Aggregates are usually classified by size as coarse aggregates, fine aggregates, and
mineral fillers. According to ASTM, coarse aggregate and fine aggregate are separated
by sieve ________ - ANSWERS#4
If you want to compact the "3/4'' CABC" to the max. density (zero voids), you would
need the gradation to have ______________ passing #4 sieve? - ANSWERS47%
Gap gradation - ANSWERSsinusoidal wave
The following characteristics, except ____________, are "Very Important" for Portland
cement concrete,
-Particle surface texture
-Absorption
-Deleterious constituents
-Unit weight, voids - loose, compacted - ANSWERSParticle surface texture
Questions with Correct Answers
A sample of aggregates with different sizes of particles is given to you. What sieve
would you need to separate this sample into the "coarse" part and the "fine" part? -
ANSWERS#4
NMAS - ANSWERSFirst sieve that accumlates
Geologically, all aggregates come from the three types of rocks: (choose all three) -
ANSWERS- Igneous
- Metamorphic
- Sedimentary
Aggregates are widely used in almost every Civil Engineering project. The top three
usages are (choose all three) - ANSWERS- as an underlying material for foundation
and pavements
- portland cement concrete
- hot mixed asphalt
Large aggregates are economically advantageous in Portland cement concrete and hot
mixed asphalt mainly because - ANSWERSlarge aggregates have less surface area
and therefore require less cement or asphalt
You were giving a sieve which has no label on it. You measured the sieve with a ruler
and found out that there are approximately 4 holes within every 1 inch distance. This
sieve most likely is sieve _______ - ANSWERS#4
Aggregates are usually classified by size as coarse aggregates, fine aggregates, and
mineral fillers. According to ASTM, coarse aggregate and fine aggregate are separated
by sieve ________ - ANSWERS#4
If you want to compact the "3/4'' CABC" to the max. density (zero voids), you would
need the gradation to have ______________ passing #4 sieve? - ANSWERS47%
Gap gradation - ANSWERSsinusoidal wave
The following characteristics, except ____________, are "Very Important" for Portland
cement concrete,
-Particle surface texture
-Absorption
-Deleterious constituents
-Unit weight, voids - loose, compacted - ANSWERSParticle surface texture
