Arra 3

Promotional Examination

Arra 3

50問 • 1年前Promotional Examination

denis cagomoc

通報

問題一覧

In slip-form construction, what is the slump of concrete used?

Almost zero

Cement which has been in storage for so long a period that there is already doubt as to its quality should:

Be retested prior to use

What penetration grade of asphaltic material is appropriate for sealing of pccp joint.

150-200

The asphalt material that is usually classified by its penetration grade is

Asphalt cement

The asphalt applies as tack coat prior to laying of bituminous mix is completely cured once it turns to what color.

Brown

What other type of cement is allowed to be used for items 311 and 405 in the absence of portland cement

Portland Pozzoland cement type IP

Soil can be compacted to 100% if

It is at optimum moisture

What is the frequency of core sampling required on a completed bituminous pavement?

Every 200 linear meter per lane

What chemical admixture is needed to produce a concrete mix with improved slump without additional water

Water reducing admixture

The cores taken from pavement section poured on a single day were tested to have strength as follows: Core. Strength 1. 3650 2. 3000 (86% of 3500psi) 3. 2450 (70% of 350Opsi) Average 3033 (87% of 3500psi) The required strength is 3500 psi, concrete in the area represented by these cores:

Is considered inadequate

Which of the following is the frequency of sampling of concrete beams required by DPWH specification:

At least one set 3 concrete beams 75cu.m. or fraction thereof

The main problem associated with wrong practice of conveying concrete is called:

Honeycomb

Compaction trials on embarkment and base/subbase courses are carried our to determine the:

All of the above

Test pitting conducted on a prepared based showed that the thickness of item 201 (aggregate base course) was deficient by 5cm. As a materials engineer. What will you recommend?

Accept the section at an adjusted price due to thickness deficience

A concrete core specimen for thickness determination shall have a diameter of at least;

100mm

If the pipes, area fabricated in projects located in remote areas and it is impractical to send samples to manila or any private testing laboratory for testing, what would you do if your are the materials engineer?

a and c

A core test for concrete pavement thickness determination showed that three (3) out of nine (9) samples taken failed to meet the thickness requirement. The deficiency in the average thickness of the cores is more than 25mm, what will you do as material engineer;

Remove and replace the area represented by the failes core sample

The test to determine the purity of asphalt cement is called;

Viscosity

Too wet mix, oversanded mix and overworking of concrete during placing usually result in _______ of concrete pavement.

Scaling

The test to indicate the temperature wherein asphalt can be heated without catching fire is called;

Flash point

Which of the following items does not require testing as basis for acceptance.

Overhaul materials

At what interval shall core samples for compacted asphalt pavement be take

200 Im per lane

In concrete pavement construction, a concrete mix was not place within 1 hour and 50 minutes. What should the materials engineer recommend?

Reject the mix

If beam samples taken from a newly pave section failed to meet the strength requirements and it is not advisable to obtain cores from the structure due to structural considerations. As materials engineer what will you do if the deficiency in strength of the concrete specimens is 15%.

Accept the section at and adjusted price due to strength deficiency

The most widely used control test in embankment construction to ensure adequate compaction is the;

Field density test

An inspection report can be issued as basis for acceptance for the following except;

Topsoil

Cores are taken from a concrete pavement and tested for

Thickness determination

What should be the length of sample 16mm diameter steel bar that should be submitted for quality test.

One meter

Laboratory report revealed that the asphalt cement used in the asphalt mix was more than what was required by the job mix. Which of the following will be most likely occur?

Shoving

Which of the following is the least likely cause of corrugations on asphalt pavement?

Unstable base material

The ratio of the weight in air of a unit volume of the impermeable portion of aggregate to the water in air of an equal volume of gas-free distilled water at a stated temperature.

Apparent Specific Gravity

Which of the following is the recommended cement content for stabilizing poorly graded sand?

6%-8%

For Item 106- Compaction Equipment and Density Control Strips, Control Strips shall have an area approximately _____ and shall be the same depth of the course/ layer it represents.

335 sq.m

The asphalt pavement represented by the individual core shall not be accepted if the deficiency in the core thickness as obtained exceeded.

5 mm

For efficient compaction, the embankment materials should be at the time of rolling be____________

At optimum moisture content

What is the Minimum Testing Requirement for embankment materials?

One (1) for every 3,000 m3 per source of fraction thereof

Which of the following describe the effects of fly ash in Portland Cement Concrete Pavement?

Increase Workability

As prescribe under Department Order No. 37 Series of 2016, Pile Integrity Test shall be conducted on.

At least 50% of the total number of bored piles

For acceptance purposes, core samples shall be taken home from the completed asphalt pavement

For every 100 linear meter per lane

The maximum number of layers for stacking cement bags which will be stored for more than 60 days?

7 layers

Which of the following in NOT included in the recommended method of curing Portland Cement Concrete Pavement?

By spraying plasticizer compound on top of the pavement after the concrete has been broom in finish

As per Item 311, the road shall not be opened to traffic until test specimens molded and cured in accordance with AASHTO T23 have attained the minimum strength requirements. What will be your option as a Materials Engineers if such tests are not conducted prior to the specified age of the pavement?

Require the contractor to prepare test specimens

Most road signs are hard to read at night. What is the specification requirement in the reduction of brightness of the reflective, sheeting during night time and when totally wet by rain?

Shall be less than 90% of the minimum specified reflective brightness value

A sample of fine aggregate was subjected to colorimetric test for inorganic impurities. Results revealed that the color produced by the sample was darker than the standard color guide. As a Materials Engineer, how will you evaluate the material?

Reject the material

During asphalt paving, the rolling shall be continued until ______ of the density of the laboratory specimens has been obtained.

97 mass percent

Which of the following practices is acceptable to use to bring down the temperature of the concrete mix?

All of the above

To determine the abrasion loss of the tested aggregates, the smoke is screened on

Sieve # 12

All shotrete shall be cured uninterrupted for at least how long?

7 days

Insufficient compaction or vibration during placing of concrete may cause what type of defect?

Honeycomb

Blended Hydraulic Cement shall conform to the requirements specified under

ASTM C595

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問題一覧

In slip-form construction, what is the slump of concrete used?

Almost zero

Cement which has been in storage for so long a period that there is already doubt as to its quality should:

Be retested prior to use

What penetration grade of asphaltic material is appropriate for sealing of pccp joint.

150-200

The asphalt material that is usually classified by its penetration grade is

Asphalt cement

The asphalt applies as tack coat prior to laying of bituminous mix is completely cured once it turns to what color.

Brown

What other type of cement is allowed to be used for items 311 and 405 in the absence of portland cement

Portland Pozzoland cement type IP

Soil can be compacted to 100% if

It is at optimum moisture

What is the frequency of core sampling required on a completed bituminous pavement?

Every 200 linear meter per lane

What chemical admixture is needed to produce a concrete mix with improved slump without additional water

Water reducing admixture

Is considered inadequate

Which of the following is the frequency of sampling of concrete beams required by DPWH specification:

At least one set 3 concrete beams 75cu.m. or fraction thereof

The main problem associated with wrong practice of conveying concrete is called:

Honeycomb

Compaction trials on embarkment and base/subbase courses are carried our to determine the:

All of the above

Test pitting conducted on a prepared based showed that the thickness of item 201 (aggregate base course) was deficient by 5cm. As a materials engineer. What will you recommend?

Accept the section at an adjusted price due to thickness deficience

A concrete core specimen for thickness determination shall have a diameter of at least;

100mm

a and c

Remove and replace the area represented by the failes core sample

The test to determine the purity of asphalt cement is called;

Viscosity

Too wet mix, oversanded mix and overworking of concrete during placing usually result in _______ of concrete pavement.

Scaling

The test to indicate the temperature wherein asphalt can be heated without catching fire is called;

Flash point

Which of the following items does not require testing as basis for acceptance.

Overhaul materials

At what interval shall core samples for compacted asphalt pavement be take

200 Im per lane

In concrete pavement construction, a concrete mix was not place within 1 hour and 50 minutes. What should the materials engineer recommend?

Reject the mix

Accept the section at and adjusted price due to strength deficiency

The most widely used control test in embankment construction to ensure adequate compaction is the;

Field density test

An inspection report can be issued as basis for acceptance for the following except;

Topsoil

Cores are taken from a concrete pavement and tested for

Thickness determination

What should be the length of sample 16mm diameter steel bar that should be submitted for quality test.

One meter

Laboratory report revealed that the asphalt cement used in the asphalt mix was more than what was required by the job mix. Which of the following will be most likely occur?

Shoving

Which of the following is the least likely cause of corrugations on asphalt pavement?

Unstable base material

The ratio of the weight in air of a unit volume of the impermeable portion of aggregate to the water in air of an equal volume of gas-free distilled water at a stated temperature.

Apparent Specific Gravity

Which of the following is the recommended cement content for stabilizing poorly graded sand?

6%-8%

For Item 106- Compaction Equipment and Density Control Strips, Control Strips shall have an area approximately _____ and shall be the same depth of the course/ layer it represents.

335 sq.m

The asphalt pavement represented by the individual core shall not be accepted if the deficiency in the core thickness as obtained exceeded.

5 mm

For efficient compaction, the embankment materials should be at the time of rolling be____________

At optimum moisture content

What is the Minimum Testing Requirement for embankment materials?

One (1) for every 3,000 m3 per source of fraction thereof

Which of the following describe the effects of fly ash in Portland Cement Concrete Pavement?

Increase Workability

As prescribe under Department Order No. 37 Series of 2016, Pile Integrity Test shall be conducted on.

At least 50% of the total number of bored piles

For acceptance purposes, core samples shall be taken home from the completed asphalt pavement

For every 100 linear meter per lane

The maximum number of layers for stacking cement bags which will be stored for more than 60 days?

7 layers

Which of the following in NOT included in the recommended method of curing Portland Cement Concrete Pavement?

By spraying plasticizer compound on top of the pavement after the concrete has been broom in finish

Require the contractor to prepare test specimens

Most road signs are hard to read at night. What is the specification requirement in the reduction of brightness of the reflective, sheeting during night time and when totally wet by rain?

Shall be less than 90% of the minimum specified reflective brightness value

Reject the material

During asphalt paving, the rolling shall be continued until ______ of the density of the laboratory specimens has been obtained.

97 mass percent

Which of the following practices is acceptable to use to bring down the temperature of the concrete mix?

All of the above

To determine the abrasion loss of the tested aggregates, the smoke is screened on

Sieve # 12

All shotrete shall be cured uninterrupted for at least how long?

7 days

Insufficient compaction or vibration during placing of concrete may cause what type of defect?

Honeycomb

Blended Hydraulic Cement shall conform to the requirements specified under

ASTM C595