WorksheetsCMT Midterm Quiz
Total questions: 20
Worksheet time: 8mins
In a concrete mix proportion of 1:2:4, what does number 4 pertain?
Sand
Gravel
Cement
Water
In a concrete mix proportion of 1:7 (Concrete Hollow Blocks), what does 1 pertain to?
Water
Gravel
Cement
Sand
In a water to cement ratio, what is the proportion in percentage of water in a ratio of 0.48?
52%
48%
0.52
0.48
Gravel is also called?
Fine aggregate
Coarse aggregate
Rocks
None of the above
For a 2m^3 volume of concrete, how many 40kg cement bags do you need if you adopt class C concrete mix proportion? (Class C - 6 cement bags for a 1m^3 concrete)
12
6
10
5
What tool among the following can you use to determine the specific gravity of sand?
Measure
Wire mesh basket
Mechanical Splitter
Pycnometer
What must you do first before testing an aggregate sample?
Dry in an oven
Submerge in water
Reduce the sample size like by quartering
Mix the sample thoroughly
How long must you keep on drying the sand sample using a blower in ASTM C128?
10-15 minutes
Until it attains the slump of an SSD condition
Until the sand is completely dry
Until the sand is free flowing when stirred
In ASTM C128, what happens if the sand sample is over-dried by a blower?
The sand will be free flowing
The sand particles cannot stick to each other to form a shape from a compaction tool
The sand is can easily be blown by the wind when made to free fall in mid-air
None of the above
Why can't 1m^3 gravel, 0.5m^3 sand, and 1 bag of cement form a more than 1.5m^3 volume of concrete even if it seems it can?
Because the aggregates have voids
Because the sand and cement can shrink if wet
Because of the pores in gravel
Because the casting process can leave some concrete on the ground
For a 3m by 3m concrete cube, estimate the number of bags of cement by using class C proportion.
9 bags
12 bags
16 bags
18 bags
For a 4m by 4m concrete, estimate the vol. of sand in m^3 by using class C proportion.
1
2
3
4
For a 4m by 4m concrete, estimate the vol. of gravel in m^3 by using class C proportion.
2
3
4
5
For a 4m by 4m concrete, estimate the size of in gallons by using class C proportion.
144
120
105
96
A fineness modulus of 3.2 is considered as?
Fine
Coarse
Very fine
Indeterminate
Can mixing wastes such as organic or non-organic materials benefit concrete in any way?
Yes
No
No because it is not allowed in the industry
Yes because concrete properties cannot be altered by all types of materials.
Is sieve analysis applicable for a typical soil material instead of sand or gravel?
Of course
No
No because they are totally different from each other
Depends if the soil can be filtered
ASTM stands for?
Asian Society for Testing and Materials
American Society for Testing and Materials
ASEAN Society for Testing and Measuring
All Societies for Testing and Measuring
Sand is a fine aggregate right?
No, it depends on the laboratory test
No, it depends on what type of sand
Yes, obviously
Yes, sand is made up of small particles
Paper can be mixed with concrete right?
No, why?
No, papers will weaken the concrete strength.
It depends on many factors, but it can
The NSCP forbid
