1. CCME REVIEW SAMPLE QUESTIONS (1-200)

For Contractor Consultant Materials Engineer

Concrete cylinder sample

What is the sample for compressive strength determination of a structural concrete?

Slump test

What is the test to determine the consistency of concrete?

1 set consist of 3-pcs sample

How many samples should be taken for every 75 cu.m fresh concrete?

Reflectorized paint

What kind of paint that has a reflectance or beads?

Asphalt

What is that construction material that has a property of being a dark brown to black cementitious material in which the predominating substance is bitumen?

1.0 m per 10,000kg per size per shipment

What is the length required for RSB sample for quality test?

3 pcs-60mm x 60mm in 1 sheet per 100shts

What is the required size of test specimen for G.I. sheets?

24 hours

For how long or how many hours shall a bituminous prime coat be left undisturbed?

0.2 to 0.7 L per sq. m

What is the rate of application of bituminous tack coat?

0 to 30 penetration grade

What is the penetration grade of blown asphalt?

Concrete beam sample

What kind of sample is taken for flexural test?

CBR, Abrasion, GPCD

What are the tests needed for the 2.650 cu.m Item 201 (Aggregate Base Course)?

3 grading tests

How many grading tests are required for a 3,200 cu.m selected borrow topping (Item 104)?

blend Item 200 with coarser materials

As a materials Engineer, what will you recommend if you find out that the materials to be used as Item 200 if finer than the required materials?

maximum of 25% and maximum of 6% respectively

What is the standard specification for LL and PI of Item 201?

80% maximum

What is the CBR requirement for Item 201?

Blown Asphalt

What asphalt is used for sealing weaken plane joint of concrete pavement?

Portland Cement Concrete Pavement

What is Item 311 of the DPWH Specification (Blue Book)?

Los Angeles Abrasion Machine

What is the machine used for abrasion test?

By Field Density Test

How to determine the degree of compaction of Items 104, 200, & 201?

LL-PL

What is the formula in obtaining the value of PI?

Grading Test, Particle Size Distribution Test, Mechanical Analysis

What are the other terms for sieve analysis?

101.86%

What is the degree of compaction of the soil if the wet density is 2,200 kg per m3, with an actual moisture content of 10.2% and a maximum dry density of 1,960 kg per m3?

5 holes per km per lane

How many concrete cores shall be taken for one (1) kilometer concrete pavement?

17.58%

What is the moisture content of the soil having an original weight of 162.5 grams and an oven – dried weight of 138.2 grams?

The soil is clayey

If the group index of a soil is high, what indication does it mean?

If the sample reaches its constant weight

As a Materials Engineer, how can you determine that the sample placed in the oven is already oven – dried?

110 ± 5°C

In oven drying a sample for test, what temperature shall be maintained?

Because it can affect its weight

Why is it that cooling an oven dried sample before weighing is advisable?

HYGROSCOPIC MOISTURE CONTENT is the moisture content of an air – dried sample while

NATURAL MOISTURE CONTENT is the moisture content of the original sample from the field.

What is the difference between hygroscopic moisture content from natural moisture content?

2000 bags

For how many bags of cement does a 10 kgs sample represents?

2 pcs - 1 m sample

For 15, 000 kgs RSB, how many samples shall be submitted for Quality Test?

Super plasticizer

An admixture is being introduced to the fresh concrete mixture for heavily reinforced concrete structure using a pumpcrete to pump out the fresh concrete mix, what admixture should it be?

As joint filler and water proofing

What is the use of blown asphalt?

Asphalt Cement

What asphalt is commonly known as hot asphalt or penetration grade asphalt?

4 days @ 50°C

How many days does the sample for Immersion – Compression Test be soaked in water?

Magnesium Oxide, Insoluble Residue, Loss on Ignition

If ductility test is for asphalt, _____ is for cement?

35% vehicle, 50% pigment, 15% beads

Paint is composed of _____

16 mm Ø and 610 mm long with hemispherical tip

What is the size of tamping rod used in tamping concrete sample?

23°C ± 1.7°C

What is the temperature to be maintained when curing sample after its initial curing?

Three (3)

Concrete cylinders are cured and ready for test. Temperature between 63°F to 85°F are permitted for a period not to exceed _____ hours immediately prior to test if free moisture is maintained on the surface of the specimen at all times.

Twenty - four (24)

The molds of specimen not to be transported shall be removed after initial curing of _____ hours and should be cured to the standard curing temperature of 73.4 °F ± 3°F

High degree of compressibility

High plasticity index means _____ of a soil?

No. 40 (0.425 mm)

Sample to be used for liquid limit and plastic limit tests should pass to what sieve?

4.54 kg with 457 mm drop

What compaction rammer shall used if the specs given for Moisture – Density Relation Test (MDR) is T – 180?

60 blows per layer

A bean mold measuring 6” x 6” x 20 is to be used for sampling concrete, how many blows or tamps per layer shall be applied?

5.10%

If asphalt mix having a weight of 3,020g and an aggregate weighing 2,865.98g, what is the % asphalt by weight of mix?

Cut – back asphalt

What is the material used for Bituminous Prime Coat?

0.004 to 0.007 m3 per m2

In Item 303, application of cover aggregates shall be evenly spread over the surface at the rate of approximately _____?

4.7% to 5.5%

Applying the tolerance of 0.4% for asphalt content to your answer in prob. 47, what is the acceptable range of asphalt content?

95% degree of compaction

An embankment having a PI of 30%, LL of 40% and GI of 0, what is the degree of compaction for this kind of soil?

8 bags per cu.m

The minimum cement factor for concrete Class “A” is 9 bags per cu.m, how about for concrete Class “B”?

Contractor

Quality control testing in a DPWH project is the responsibility of the_____?

Once the source is identified

As Materials Engineer, when is the right time to start sampling and testing aggregates?

3,000 psi

The minimum compressive strength for concrete Class “P” is 5,000 psi, what is the minimum compressive strength for concrete Class “C”?

Ten (10)

The volume of concrete mixer per batch shall not exceed the mixer’s nominal capacity in cu.m as shown on the manufacturer’s standard plate on the mixer, except that an overload up to _____ percent above the mixer’s nominal capacity may be permitted provided concrete test data for strength, segregation, and uniform consistency are satisfactory, and provided that no spillage of concrete takes place.

at no less than 5 meter intervals parallel to the centerline in each direction from the affected location

Where do we take additional cores when the measurement of any core taken from pavement is deficient in thickness by more than 25 mm?

hot climate

Under what climatic condition do we use lower penetration grade or hard asphalt?

Materials test results/reports

What is the basis for the acceptance or rejection of any construction material?

Consistency

Penetration test is for asphalt: cement is to _____?

at least one but not to exceed three samples

Slump test is a very important test in fresh concrete to determine _____?

four (4)

The thickness of concrete core using a caliper is based on how many measurements?

consistency of concrete

Slump test is a very important test in fresh concrete to determine _____?

nine (9)

The thickness of asphalt core using a caliper is based on how many measurements?

may be the sampling is incorrect

Failed samples do not necessarily mean that the structure it represents is defective, why?

20 liters

The specification calls for a 1: 2:4 concrete mix. In a one bagger mixer, which of the following amount of water is most

likely required for the mix?

overheating during the process of manufacture

The spot test on asphalt is used to determine ______.

4 pails

How many samples shall be submitted for test if 315 pails of flat wall enamel paint are to be used in the project?

2 samples for CBR and 17 samples for sieve analysis

Aggregate Sub – base course has a volume of 5, 000 cu.m and to be laid in a 15cm compacted depth. How many samples shall be submitted for CBR test and for sieve analysis?

Two (2) samples

How many samples shall be submitted for quality test if 60 tons of Bituminous Prime Coat is to be used in the project?

Six (6) compaction tests

How many compaction tests shall be conducted for Item 201 having a volume of 8,250 cu.m?

Summary of field tests and status of test

What composed of Materials Quality Control Monthly Reports?

1 part cement and 2 parts sand by volume with sufficient water

What is the required mixing of mortar for Item 505 (Stone Masonry)?

1 part cement and 2 parts sand by volume with sufficient water

What is the required mixing of mortar for Item 500 (Pipe Culverts and Storm Drains)?

Quality Control Program

Before the project starts, the materials Engineer or the technician must have a program on how many samples for each item of work should be tested based on the minimum testing requirements. What program or report is this?

apply quartering method and get two opposite sides as sample

If sample splitter is not available for use in reducing samples for test, what is the alternative way of reducing sample for testing size?

Fourteen (14)

The road will not be opened to traffic until test specimens molded and cured have attained the minimum strength

requirements. If such tests are not conducted prior to the specified age the pavement shall not be operated to traffic until _____ days after the concrete was placed.

Status of Test

As the work progresses, the Materials Engineer should know how many sample has been submitted and tested and how many samples are to be submitted, in other words the ME must refer to what report so that he or she may be updated on the balance and on file quality test of the construction materials being used in the project?

Plastic Limit

It is the minimum moisture content at which the soil can be molded without breaking or crumbling up to (3.2 mm).

Liquid Limit

The _____ is expressed as the moisture content corresponding to 25 blows.

127 mm

The concrete has been tested for consistency by the use of a slump cone with base and tamping rod. After the test, the height of concrete measured is 178 mm. what is the slump of the concrete?

30 – 33 rpm

What is the rate of revolution per minute of an abrasion Machine used for testing the mass percent of wear?

360 bags of cement; 585 kgs of fine aggregates; 1035 kgs coarse aggregates; 130 liters water

If the design of concrete mix has the following corrected batch weights: cement = 40 kgs, fine aggregates = 65 kgs, coarse aggregate = 115 kgs, and water = 15 liters. What is your actual batch weights for 1 cu.m Class “A” concrete?

Yes, because the specs is 50% maximum

After the soil has been tested in an Abrasion Machine, the mass % of wear computed is equal to 21%. If this material is for Item 201, does it pass the DPWH specs?

Week

Quality Control Assurance Report should be submitted every _____?

Before it is incorporated into work

One of the duties of Materials Engineer is to see to it that all the construction materials be tested:

200 mm loose measurement

What is the maximum depth or roadway embankment per horizontal layer in loose measurement?

3 samples for compressive strength and 3 samples for absorption

Why is it that 6 samples are needed for quality test of concrete masonry?

Sample Card

Sample submitted for test should have a tag bearing the name of the project, the quantity represented, kind of sample, original source, who sampled and who submitted it, the date sampled and date submitted and etc. What is the common name of that tag for you as Materials Engineer?

Three (3)

If course aggregate like embankment is to be placed in layers, how many layers should a 40 cm thick Aggregate Base Course is placed?

One (1) month

The ME should always be alert of his schedule with regards to the number of days of a quality test that takes place. Since not all construction materials can be tested just for a day or even a week so, what is the lead time should he consider

for a quality test of a cement sample?

Four (4)

CBR Sample for test has been compacted but it should be soaked for how many days before testing?

Compaction Test or Moisture Density Relation Test

If sieve analysis and plasticity test are used for Soil Classification, what test that its result be used in field density test?

No, because the moisture content is high and can affect the result

Heavy rains occur the night before prior to your scheduled field density test, are you going to pursue your schedule?

Why?

Extraction Test

Checking the gradation of composite aggregates and asphalt content of asphalt mix can be done by what test?

Glass Plate

What apparatus is used in plastic limit test?

Liquid limit device with grooving tool

What is the device used in testing for liquid limit test?

Not to exceed 15 seconds at 50 – 60 cm interval

How long does a vibrator be inserted in a concrete mix?

Berm

Along the slope of high embankment ____ is provided as an erosion control measures and also to improve the stability of the slope.

Abrasion

In soil and sub – surface explorations for flood control design of foundation condition, a soil sample was taken for field and laboratory tests. The test required for soil was taken, except: specific gravity, ________, water content, Atterberg Limits, gradation, compaction, relative density