APP REVIEWER 2

Question 1

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?

Answer 1

95% Degree of Compaction

Question 2

The minimum cement factor for concrete Class A is 9 bags / cu.m. How about for concrete Class B?

Answer 2

8 bags per cubic meter

Question 3

Quality control testing in a DPWH project is the responsibility of the ____

Answer 3

Constractor

Question 4

When is the right time to start sampling and testing aggregates?

Answer 4

Once the source is identified

Question 5

The minimum compressive strength for concrete Class P is 5,000 psi. What is the minimum compressive strength of concrete Class C?

Answer 5

3,000 psi

Question 6

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

Answer 6

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

Question 7

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

Answer 7

Hot climate (Cold climate is for higher penetration grade or soft asphalt)

Question 8

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

Answer 8

Materials test results / reports

Question 9

Penetration test is for asphalt as cement is to ____

Answer 9

Consistency

Question 10

Slump test is a very important test in fresh concrete to determine ____

Answer 10

Consistency of concrete

Question 11

How many samples should be taken for an asphalt mix for each full days operation?

Answer 11

1 - 3 samples

Question 12

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

Answer 12

Four

Question 13

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

Answer 13

Nine

Question 14

Failed samples do not necessarily mean that the structure it represents is defective. Why?

Answer 14

Maybe the sampling is incorrect

Question 15

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

Answer 15

20 Liters

Question 16

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

Answer 16

4 pails

Question 17

The spot test on asphalt is used to determine ____

Answer 17

Overheating during the process of manufacture

Question 18

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

Answer 18

2 samples for CBR
17 samples for sieve analysis

Question 19

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

Answer 19

2 samples

Question 20

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

Answer 20

6 compaction tests

Question 21

What composed of Materials Quality Control Monthly Reports?

Answer 21

Summary of field tests and status of tests

Question 22

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

Answer 22

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

Question 23

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

Answer 23

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

Question 24

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?

Answer 24

Quality Control Program

Question 25

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

Answer 25

Apply quartering method and get two opposite sides as sample

Question 26

Minimum moisture content at which the soil can be molded without breaking or crumbling up to 1/8 (3.2 mm)

Answer 26

Plastic Limit

Question 27

Moisture content corresponding to 25 blows

Answer 27

Liquid Limit

Question 28

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

Answer 28

127 mm

Question 29

What is the rate of revolution of an abrasion machine used for testing the mass percent of water?

Answer 29

30 - 33 rpm

Question 30

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

Answer 30

Yes, because the specs is 50% maximum

Question 31

Quality Control Assurance Report should be submitted every ____

Answer 31

Week

Question 32

One of the duties of Materials Engineer is to see to it that all the onstruction materials are tested ____

Answer 32

Before it is incorporated into work

Question 33

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

Answer 33

200 mm loose measurement

Question 34

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

Answer 34

3 samples for compressive strength and 3 samples for absorption

Question 35

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

Answer 35

Berm

Question 36

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

Answer 36

3

Question 37

How long deep does a vibrator have to be inserted in a concrete mix?

Answer 37

Not to exceed 15 seconds at 50-60 cm interval

Question 38

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

Answer 38

Four

Question 39

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

Answer 39

Four

Question 40

If sieve analysis and plasticity tests are used for soil classification, what test its result be used in field density test?

Answer 40

Compaction Test or Moisutre Density Relation Test

Question 41

Heavy rain occurs the night before the scheduled field density test. Are you going to pursue the schedule? Why?

Answer 41

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

Question 42

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

Answer 42

Extraction Test

Question 43

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

Answer 43

Specific gravity, abrasion, water content

Question 44

Structure crossing above such covered underground drainage conduit shall be laid at least ___ above the top of the conduit

Answer 44

0.5m, 1.0m, 1.5m, 2.0m

Question 45

Class of stones for riprap ranging from 30kg to a maximum of 70kg with at least 50% of the stones weighing more than 50kg

Answer 45

Class B