11-43.
Portland cement is a mixture
of clay and limestone of which
a certain percentage must pass
through a No. 200 sieve?
1.
80%
2.
90%
3.
95%
4.
100%
A.
Type I
E.
Type V
B.
Type II
F.
Type IP
C
Type III G.
Type IS
D.
Type IV
H.
Air-entrained
Figure 11A
IN ANSWERING QUESTIONS 11-44 THROUGH
11-47, SELECT FROM FIGURE 11A THE TYPE OF
CEMENT THAT IS THE CORRECT RESPONSE. ALL
INDIVIDUAL RESPONSES MAY NOT BE USED.
11-44.
This type of cement is normally
used is cold-weather construction.
1. B
2. C
3. D
4. F
11-45.
Which of the following types of
cement is not available as air
entrained?
1. C
2. D
3. F
4. G
11-46.
This type of cement is considered
all-purpose and is used in
ordinary construction.
1. A
2. E
3. G
4. H
11-47.
This type of cement produces
concrete with less strength than
concrete made with portland cement
but the workability is better.
1. D
2. E
3. F
4. G
11-48.
What type of cement is used
to prevent staining or darkening
of finished concrete?
1.
Waterproofed cement
2.
Air-entrained cement
3.
Pozzolan cement
4.
White cement
11-49.
What is the maximum time the
hardening test should take to
complete?
1.
6 hours
2.
10 hours
3.
16 hours
4.
24 hours
Learning Objective: Identify
types of water used in concrete,
the impurities found in the water,
and the effects the impurities
have on the concrete. Identify
the types and requirements of
aggregate and identify the tests
used on the aggregates.
11-50.
Which of the following purposes
does water serve in the concrete
mix?
1.
Starts the hydration
2.
Changes the hydration process
3.
Retards the hydration
4.
Reduces workability
11-51.
What effect does organic material
have on the hydration process?
1.
Prevents a full chemical
reaction
2.
Prevents cement adherence
3.
Contributes to concrete
deterioration
4.
Each of the above
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