WorksheetsFinal Term Quiz No. 2: Cement and Concrete
Total questions: 23
Worksheet time: 25mins
Specification for 20-30 Sand
C778
C779
C780
C777
Required flow for Air Content Test of Cement
7.2" -7.8"
7.1" -7.7"
8.2" -8.8"
8.1" -8.7"
Number of drop of the flow table within 6 seconds.
10
15
20
25
Volume of the cylindrical measure.
400 ml
500 ml
600 ml
450 ml
Slow Speed of the Mechanical Mixer.
140±5 rpm
285±10 rpm
140±10 rpm
285±5 rpm
Medium Speed of the Mechanical Mixer.
285±10 rpm
285±5 rpm
140±10 rpm
140±5 rpm
What is the actual mass per unit volume if the mass of mortar is 950.10g?
2.375
2.875
2.655
2.566
What is the Specific Gravity of Cement?
3.15
2.65
4.15
3.65
What is the Specific Gravity of Sand?
2.65
3.15
3.65
4.15
It is a measurement of concrete's workability, or fluidity.
Slump
Flexural
Compressive
All of the above
The Slump when vibrated
10 mm to 40 mm
40 mm - 75 mm
20 mm - 50 mm
50 mm - 85 mm
Slump when not vibrated.
40 mm - 75 mm
50 mm - 85 mm
10 mm - 40 mm
20 mm - 50 mm
Dimension of rectangular beam mold.
21" x 6" x 6 "
20" x 5" x 5"
22" x 6" x 6 "
20" x 6" x 6 "
How many quality test for every 75 cu.m. or fraction thereof, each day of pouring for cylindrical specimen
1 QT
2 QT
3 cylinders
6 cylinders
How many blows per layer for a concrete beam sample?
63 blows
126 blows
25 blows
50 blows
Flexural Strength requirement for a Third Point Loading Method.
3.80 MPa
4.50 MPa
3.60 MPa
4.60 MPa
Flexural Strength requirement for Center Point Loading Method.
4.50 MPa
3.80 MPa
4.60 MPa
3.60 MPa
Compressive Strength requirement at 14 days minimum.
3,500 psi
4,400 psi
3,000 psi
4,000 psi
The strength level of the concrete will be considered satisfactory if the averages of all three (3) consecutive strength test results equal or exceed the specified strength, and no individual strength test result is deficient by more than 15% of the specified strength.
True
False
Maybe
Concrete in the area represented by the cores will be considered adequate if the average strength of the cores is equal to at least 75% of, and if no single core is less than 85% of, the specified strength.
True
False
Maybe
No acceptance and final payment shall be made on completed pavement unless core test for thickness determination is conducted, except for Barangay Roads where the implementing office is allowed to waive such test.
True
False
Maybe
How many measurement of core for thickness determination.
10
11
8
9
Given the Strength of the Core:
Core 1 = 23.40 Mpa
Core 2 = 15.90 Mpa
Core 3 = 24.50 Mpa
What is your evaluation.
The concrete cores is considered inadequate
The concrete cores is considered adequate
The concrete cores is may be accepted
None of these
