CM 2112 Exam 1 for Ali Kazemian Questions With
Complete Solutions
...... is the main hydration product which is stable and helps the
concrete gain mechanical strength over time, while calcium
hydroxide is not an ideal hydration product (water soluble).
Question 1Answer
a.
Calcium Oxide (CaO)
b.
Silicon Dioxide (S)
c.
Tricalcium Aluminate
d.
Calcium Silicate Hydrate (C-S-H) Correct Answers d.
Calcium Silicate Hydrate (C-S-H)
A better mixture homogeneity can be achieved by using twin-
shaft mixers, due to the high degree of turbulence developed in
the intersection zone of the two mixing circles.
Question 2Answer
a.
True
b.
False Correct Answers a.
True
A lower W/CM ratio leads to....
Question 1Answer
a.
Lower concrete permeability
,b.
Higher strength
c.
Lower porosity
d.
All of the above Correct Answers d.
All of the above
A paver speed is directly governed by all of the followings,
EXCEPT:
Question 1Answer
a.
Screed action
b.
Material response
c.
The material response to angle of attack (attitude)
d.
Plant efficiency Correct Answers d.
Plant efficiency
A useful rule for selecting a single-acting hammer is to choose
one with a weight roughly equal to that of the pile.
Question 1Answer
a.
True
b.
False Correct Answers a.
True
,A vibratory hammer drives a pile through a combination of
driving force, frequency, amplitude, and free-hanging weight.
The driving force of a vibratory hammer is determined by ......
and.......
Question 2Answer
a.
eccentric moment - steady state frequency
b.
single acting steam - amplitude
c.
Stroke - frequency
d.
Differential acting steam - frequency Correct Answers a.
eccentric moment - steady state frequency
Absorption capacity is defined as...
a.
The amount of water exceeding the SSD condition
b.
The difference between air dry and SSD conditions
C.
The difference between SSD and oven-dry conditions
d.
The difference between wet and oven-dry conditions Correct
Answers C.
The difference between SSD and oven-dry conditions
All of the followings are advantages of using Fly Ash as an
SCM, EXCEPT:
Question 3Answer
a.
, Higher workability
b.
Higher long-term strength
c.
Faster hydration
d.
Lower workability loss Correct Answers c.
Faster hydration
Asphalt binder...
Question 2Answer
a.
is a thermoset material that hardens as it is heated
b.
is a thermoplastic material that hardens as it is heated
c.
is a thermoset material that softens as it is heated
d.
is a thermoplastic material that softens as it is heated Correct
Answers d.
is a thermoplastic material that softens as it is heated
Cements that not only harden by reacting with water, but also
form a water-resistant product are called:
Question 4Answer
a.
Non-hydraulic cement
b.
Refractory cement
c.
Hydraulic cement
Complete Solutions
...... is the main hydration product which is stable and helps the
concrete gain mechanical strength over time, while calcium
hydroxide is not an ideal hydration product (water soluble).
Question 1Answer
a.
Calcium Oxide (CaO)
b.
Silicon Dioxide (S)
c.
Tricalcium Aluminate
d.
Calcium Silicate Hydrate (C-S-H) Correct Answers d.
Calcium Silicate Hydrate (C-S-H)
A better mixture homogeneity can be achieved by using twin-
shaft mixers, due to the high degree of turbulence developed in
the intersection zone of the two mixing circles.
Question 2Answer
a.
True
b.
False Correct Answers a.
True
A lower W/CM ratio leads to....
Question 1Answer
a.
Lower concrete permeability
,b.
Higher strength
c.
Lower porosity
d.
All of the above Correct Answers d.
All of the above
A paver speed is directly governed by all of the followings,
EXCEPT:
Question 1Answer
a.
Screed action
b.
Material response
c.
The material response to angle of attack (attitude)
d.
Plant efficiency Correct Answers d.
Plant efficiency
A useful rule for selecting a single-acting hammer is to choose
one with a weight roughly equal to that of the pile.
Question 1Answer
a.
True
b.
False Correct Answers a.
True
,A vibratory hammer drives a pile through a combination of
driving force, frequency, amplitude, and free-hanging weight.
The driving force of a vibratory hammer is determined by ......
and.......
Question 2Answer
a.
eccentric moment - steady state frequency
b.
single acting steam - amplitude
c.
Stroke - frequency
d.
Differential acting steam - frequency Correct Answers a.
eccentric moment - steady state frequency
Absorption capacity is defined as...
a.
The amount of water exceeding the SSD condition
b.
The difference between air dry and SSD conditions
C.
The difference between SSD and oven-dry conditions
d.
The difference between wet and oven-dry conditions Correct
Answers C.
The difference between SSD and oven-dry conditions
All of the followings are advantages of using Fly Ash as an
SCM, EXCEPT:
Question 3Answer
a.
, Higher workability
b.
Higher long-term strength
c.
Faster hydration
d.
Lower workability loss Correct Answers c.
Faster hydration
Asphalt binder...
Question 2Answer
a.
is a thermoset material that hardens as it is heated
b.
is a thermoplastic material that hardens as it is heated
c.
is a thermoset material that softens as it is heated
d.
is a thermoplastic material that softens as it is heated Correct
Answers d.
is a thermoplastic material that softens as it is heated
Cements that not only harden by reacting with water, but also
form a water-resistant product are called:
Question 4Answer
a.
Non-hydraulic cement
b.
Refractory cement
c.
Hydraulic cement
