LSU CM 2112 KAZEMIAN SELF-ASSESSMENT QUIZES
FOR FINAL QUESTIONS WITH VERIFIED ANSWERS
Aggregate "soundness test" includes testing the durability of aggregate when subjected
to cycles of wetting and drying, of freezing and thawing.
a.True
b.False - Answers - a.True
All of the followings are aggregate physical tests, EXCEPT FOR:
a.Aggregate angularity
b.Soundness test
c.Los Angeles abrasion test
d.Acid solubility test - Answers - d.Acid solubility test
If a low screening efficiency is permissible, the actual capacity of a screen will be .....
the values given in the screen capacity chart.
a.higher than
b.lower than
c.Equal to - Answers - a.higher than
In general, .... aggregates are typically preferred for concrete production, and ...
aggregate are preferred for asphalt production.
a.round/natural - angular/crushed
b.round/natural - round/natural
c.angular/crushed - round/natural
d.angular/crushed - angular/crushed - Answers - a.round/natural - angular/crushed
Petrographic examination of aggregate involves a detailed mineralogical analysis to
identify the aggregate's rock type, texture, and potential for deleterious reactivity.
, a.True
b.False - Answers - a.True
Singe rotor impact crushers produce a cubical product but are economical only for "low-
abrasion" feeds.
a.True
b.False - Answers - a.True
The "capacity" of a screen is the total amount of material fed and passed over its
surface.
a.True
b.False - Answers - b.False
These are the most commonly used impact crushers:
a.Hammer mills
b.Horizontal shaft impactor (HSI)
c.Vertical shaft impactor (VSI)
d.Double-roll impactor - Answers - a.Hammer mills
This type of crusher receives the stone directly from the excavation after blasting and
initially reduces the stone size.
a.Roll crusher
b.Primary crusher
c.Tertiary crusher
d.Gyratory crusher - Answers - b.Primary crusher
What is the most commonly used type of aggregate production screen?
a.Trommel screens
b.Horizontal screens
c.Vibrating screens
FOR FINAL QUESTIONS WITH VERIFIED ANSWERS
Aggregate "soundness test" includes testing the durability of aggregate when subjected
to cycles of wetting and drying, of freezing and thawing.
a.True
b.False - Answers - a.True
All of the followings are aggregate physical tests, EXCEPT FOR:
a.Aggregate angularity
b.Soundness test
c.Los Angeles abrasion test
d.Acid solubility test - Answers - d.Acid solubility test
If a low screening efficiency is permissible, the actual capacity of a screen will be .....
the values given in the screen capacity chart.
a.higher than
b.lower than
c.Equal to - Answers - a.higher than
In general, .... aggregates are typically preferred for concrete production, and ...
aggregate are preferred for asphalt production.
a.round/natural - angular/crushed
b.round/natural - round/natural
c.angular/crushed - round/natural
d.angular/crushed - angular/crushed - Answers - a.round/natural - angular/crushed
Petrographic examination of aggregate involves a detailed mineralogical analysis to
identify the aggregate's rock type, texture, and potential for deleterious reactivity.
, a.True
b.False - Answers - a.True
Singe rotor impact crushers produce a cubical product but are economical only for "low-
abrasion" feeds.
a.True
b.False - Answers - a.True
The "capacity" of a screen is the total amount of material fed and passed over its
surface.
a.True
b.False - Answers - b.False
These are the most commonly used impact crushers:
a.Hammer mills
b.Horizontal shaft impactor (HSI)
c.Vertical shaft impactor (VSI)
d.Double-roll impactor - Answers - a.Hammer mills
This type of crusher receives the stone directly from the excavation after blasting and
initially reduces the stone size.
a.Roll crusher
b.Primary crusher
c.Tertiary crusher
d.Gyratory crusher - Answers - b.Primary crusher
What is the most commonly used type of aggregate production screen?
a.Trommel screens
b.Horizontal screens
c.Vibrating screens
