CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
During the slump flow test (ASTM C1611) the stability (segregation resistance) of SCC can also be
evaluated by visual inspection. - (ANSWER)T
Flexural strength of plain concrete is usually around .... of its compressive strength, while tensile
strength is only about .... of its compressive strength.
Question 2Answer
a.
15% - 15%
b.
20% - 10%
c.
25% - 15%
d.
15% - 10% - (ANSWER)d.
15% - 10%
In normal conditions, the hydration reactions during the first 0.5 hour (after the initial water-cement
contact) are not significant, and the resulting slump loss is negligible.
Question 3Answer
a.
True
b.
False - (ANSWER)T
Plastic shrinkage cracking occurs when water evaporates from the surface of fresh concrete faster than
it can travel to the surface during the bleeding process.
Question 4Answer
a.
True
,CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
b.
False - (ANSWER)T
Portland cement production is an energy-intensive AND carbon-intensive process.
Question 5Answer
a.
True
b.
False - (ANSWER)T
SCC formwork pressure is lower than conventional concrete, due to its workability.
Question 6Answer
a.
True
b.
False - (ANSWER)F
The chemical reactions between Portland cement and water are called:
Question 7Answer
a.
Hydration reactions
b.
Sublimation reactions
c.
Polymerization reactions
d.
Pozzolanic reactions - (ANSWER)a.
Hydration reactions
,CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
The main disadvantages of concrete as a construction material include all of the followings, EXCEPT:
Question 8Answer
a.
Dimensional instability
b.
Low strength to weight ratio
c.
Flammability
d.
Brittleness - (ANSWER)c.
Flammability
This is the most universally used measure for concrete quality:
Question 9Answer
a.
Compressive strength
b.
Compressive modulus of elasticity
c.
Tensile strength
d.
Flexural strength - (ANSWER)a.
Compressive strength
Traditional specifications and tests for concrete strength are based on ...
Question 10Answer
a.
, CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
Specimens cured in dry conditions for 7 days
b.
Specimens cured under standard temperature-humidity conditions for 28 days
c.
Specimens cured in hot and humid conditions for 7 days
d.
Specimens cured under standard temperature-humidity conditions for 14 days - (ANSWER)b.
Specimens cured under standard temperature-humidity conditions for 28 days
Two types of concrete pumps are piston pumps and peristaltic pumps. In the piston pumps, the concrete
in the hopper is fed into the pump by gravity aided by suction, while in peristaltic pumps, the concrete is
fed by rotating blades in the hopper.
Question 11Answer
a.
True
b.
False - (ANSWER)a.
True
Type IV (four) Portland cement is...
Question 12Answer
a.
a general-purpose cement intended for use where concrete is not subject to specific exposures.
b.
cement modified to resist moderate sulfate attack.
c.
a high early-strength cement.
d.
a special cement with low heat of hydration. - (ANSWER)d.
During the slump flow test (ASTM C1611) the stability (segregation resistance) of SCC can also be
evaluated by visual inspection. - (ANSWER)T
Flexural strength of plain concrete is usually around .... of its compressive strength, while tensile
strength is only about .... of its compressive strength.
Question 2Answer
a.
15% - 15%
b.
20% - 10%
c.
25% - 15%
d.
15% - 10% - (ANSWER)d.
15% - 10%
In normal conditions, the hydration reactions during the first 0.5 hour (after the initial water-cement
contact) are not significant, and the resulting slump loss is negligible.
Question 3Answer
a.
True
b.
False - (ANSWER)T
Plastic shrinkage cracking occurs when water evaporates from the surface of fresh concrete faster than
it can travel to the surface during the bleeding process.
Question 4Answer
a.
True
,CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
b.
False - (ANSWER)T
Portland cement production is an energy-intensive AND carbon-intensive process.
Question 5Answer
a.
True
b.
False - (ANSWER)T
SCC formwork pressure is lower than conventional concrete, due to its workability.
Question 6Answer
a.
True
b.
False - (ANSWER)F
The chemical reactions between Portland cement and water are called:
Question 7Answer
a.
Hydration reactions
b.
Sublimation reactions
c.
Polymerization reactions
d.
Pozzolanic reactions - (ANSWER)a.
Hydration reactions
,CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
The main disadvantages of concrete as a construction material include all of the followings, EXCEPT:
Question 8Answer
a.
Dimensional instability
b.
Low strength to weight ratio
c.
Flammability
d.
Brittleness - (ANSWER)c.
Flammability
This is the most universally used measure for concrete quality:
Question 9Answer
a.
Compressive strength
b.
Compressive modulus of elasticity
c.
Tensile strength
d.
Flexural strength - (ANSWER)a.
Compressive strength
Traditional specifications and tests for concrete strength are based on ...
Question 10Answer
a.
, CM 2112 Exam 1 for Ali Kazemian Questions With Complete Solutions
Specimens cured in dry conditions for 7 days
b.
Specimens cured under standard temperature-humidity conditions for 28 days
c.
Specimens cured in hot and humid conditions for 7 days
d.
Specimens cured under standard temperature-humidity conditions for 14 days - (ANSWER)b.
Specimens cured under standard temperature-humidity conditions for 28 days
Two types of concrete pumps are piston pumps and peristaltic pumps. In the piston pumps, the concrete
in the hopper is fed into the pump by gravity aided by suction, while in peristaltic pumps, the concrete is
fed by rotating blades in the hopper.
Question 11Answer
a.
True
b.
False - (ANSWER)a.
True
Type IV (four) Portland cement is...
Question 12Answer
a.
a general-purpose cement intended for use where concrete is not subject to specific exposures.
b.
cement modified to resist moderate sulfate attack.
c.
a high early-strength cement.
d.
a special cement with low heat of hydration. - (ANSWER)d.
