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MATERIALS ENGINEERING > APP REVIEWER 2 > Flashcards

APP REVIEWER 2 Flashcards

1
Q

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?

A

95% Degree of Compaction

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2
Q

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

A

8 bags per cubic meter

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3
Q

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

A

Constractor

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4
Q

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

A

Once the source is identified

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5
Q

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

A

3,000 psi

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6
Q

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

A

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

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7
Q

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

A

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

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8
Q

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

A

Materials test results / reports

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9
Q

Penetration test is for asphalt as cement is to ____

A

Consistency

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10
Q

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

A

Consistency of concrete

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11
Q

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

A

1 - 3 samples

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12
Q

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

A

Four

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13
Q

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

A

Nine

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14
Q

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

A

Maybe the sampling is incorrect

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15
Q

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?

A

20 Liters

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16
Q

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

A

4 pails

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17
Q

The spot test on asphalt is used to determine ____

A

Overheating during the process of manufacture

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18
Q

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?

A

2 samples for CBR
17 samples for sieve analysis

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19
Q

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

A

2 samples

20
Q

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

A

6 compaction tests

21
Q

What composed of Materials Quality Control Monthly Reports?

A

Summary of field tests and status of tests

22
Q

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

A

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

23
Q

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

A

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

24
Q

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?

A

Quality Control Program

25
Q

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

A

Apply quartering method and get two opposite sides as sample

26
Q

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

A

Plastic Limit

27
Q

Moisture content corresponding to 25 blows

A

Liquid Limit

28
Q

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

A

127 mm

29
Q

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

A

30 - 33 rpm

30
Q

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?

A

Yes, because the specs is 50% maximum

31
Q

Quality Control Assurance Report should be submitted every ____

A

Week

32
Q

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

A

Before it is incorporated into work

33
Q

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

A

200 mm loose measurement

34
Q

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

A

3 samples for compressive strength and 3 samples for absorption

35
Q

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

A

Berm

36
Q

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

A

3

37
Q

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

A

Not to exceed 15 seconds at 50-60 cm interval

38
Q

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

A

Four

39
Q

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

A

Four

40
Q

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

A

Compaction Test or Moisutre Density Relation Test

41
Q

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

A

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

42
Q

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

A

Extraction Test

43
Q

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

A

Specific gravity, abrasion, water content

44
Q

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

A

0.5m, 1.0m, 1.5m, 2.0m

45
Q

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

A

Class B

MATERIALS ENGINEERING (7 decks)

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