Arra 4

Promotional Examination

Arra 4

67問 • 1年前Promotional Examination

問題一覧

As prescribe under DPWH Standard Specification for Item 522, the number of installed anchor bolts/ soil nails shall be subjected to mandatory proof pull test shall be

3% of the total number or minimum of two (3) installed anchor bolts/ soil nail.

Laboratory Compaction Test in determining the relation between the moisture content and density of soils, using mold of given size with 2.5 kg (5.5 Ibs) and rammer dropped from a height of 305mm (12in.) Where no method shall govern?

Method A-a 101.6mm (4in.) mold; soil materials passing a 4.75mm (no.4) sieve

As prescribe under DPWH Standard Specification for Item 522, mesh systenm (active) shell be installed as per construction drawings using anchor bolts/ soil nails with minimum grid spacing of

2.0mx 2.0m

Which component of the soil aggregates that acts as soil binder which is significant in the information of embankment, laying of subbase and base course that form a frim and stable base when compacted?

Portion of soil passing sieve no. 4

A sample weighing 5000g was subjected to abrasion test, wherein 2000g of samples was retained on No12 sieve after washing. What is abrasion loss?

How many core shall be taken for thickness determination of 1 km of PCCP pavement consisting of single traffic lane?

5 cores

For Item 307 Bituminous Plant-Mix Surface Course-General, all of the bituminous materials required for one batch shall be discharged in not more than after the flow has started.

15 seconds

Thickness of reflectorized thermoplastic rumble strips as prescribed under specifications

4 mm to 13 mm

Samples of Aggregate Base Course materials when tested for quality passed the requirements except for grading. What will you recommend as a Material Engineer?

Reprocess the material by blending

Plastic limit corresponds to the moisture content of soil?

When it starts to crumble when rolled into a 3.2 mm diameter thread

What shall be done in order to determine the effective capacity of a particular compacting equipment (rollers) to attain the required density of embankment?

Conduct a minimum 500 square meters trial section

What class of concrete is generally used for thin reinforced section and railings?

Class C

The temperature at which the bituminous material will evolve vapors that will temporarily ignite when a small flame is brought in contact with it.

Flash Point

Which of the following prescribe the specification for zinc coated (galvanized) corrugated iron or steel culvert and underdrains?

ASSHTO M36

The phenomenon wherein the soil subgrade losses strength due to ground shaking and the presence of dine grained cohesion less soil:

Liquefaction

Theoretically, which of the following water-cement ratios will produce the highest compressive strength?

0.42

As prescribed under Item 606 - Pavement Markings, traffic paint shall be applied to the pavement at the rate of 0.33 L/m2 and shall dry sufficiently to be free from cracking in from

15 to 30 minutes

Which of the following will be the result of proper compaction of an embankment material

Increase shear strength and soil stability

During hot weather, necessary steps shall be undertaken to prevent the temperature of the mix concrete from exceeding a maximum of what temperature?

32 Degree Celsius

When curing waterproof membrane, the joint seams of the material shall have a minimum lap of

100 mm

The minimum cement content per cubic meter of Class P Structural Concrete is:

440 kg. (11 Bags)

The test which combines a load-formation test performed in the laboratory with an empirical design chart to determine the thickness of pavement base and other layers is known as:

California Bearing Ratio

Payment for Item 311 - Portland Cement Concrete Pavement shall be base on of concrete placed and accepted in the completed pavement.

square meter

Why are undisturbed samples used primarily for determining the properties of foundation materials?

Because it represents the relative strength of the soil strata when subjected to compression test.

Asphalt Emulsion Mixes are also known as?

Cold Mix Asphalt

The optimum moisture content of soil is deternined during:

Laboratory Compaction

Which of the following is the proper way of rolling in asphalt pavement?

Start at the sides and proceeds towards the centerline or crown of the road, each strip overlapping half of the roller.

The type of joint in concrete pavement that is pre-formed to accommodate the thermal expansion and contraction of concrete.

Sewed Joint

What test was conducted on the soil?

CBR Test

For Item 205 - Asphalt Stabilized Road Mix Base Course, the amount of asphaltic materials to be added to the soil-aggregate shall be:

From 4 to 7 mass percent of the dry soil

Which of the following is the acceptable rate of loading when testing the compressive strength of the cylinder?

0.14to 0.34 Mpa/sec.

After the placement of concrete, how long shall pre-cast concrete members be subjected to pre-steaming when it will be subjected to steam curing?

Minimum of 4 hours

In order to facilitate the acceptance of cement to be used in the implementation of various DPWH projects, the Compressive strength of mortar samples tested at 3 days and 7 days can be considered for acceptance provided that the strength of the samples at 7 days is not less than of the Compressive strength requirement for 28 days.

85%

For Item 204- Portland cement stabilized road mix base course, the amount of cement to be added to the soil-aggregate shall be:

From 6 to 10 mass percent of the dry soil

Asphalt cement shall not be used while it is foaming nor shall be heated above at any time after delivery in the project

159 degree celsius

Suppose you have a sack of aggregate sample weighing 20kg. But you only need 5kg for a certain test. In the absence of sample splitter, what will be the best way to get a 5 kilograms sample?

Perform the quartering procedure and take the sample on the two adjacent quadrants.

In the latest approved DPWH Standard the maximum compacted Specification, thickness per layer for item 200 & 201 shall be?

200 mm

For Item 311,the depth of the weakened plane joint should at all times be:

not less than 50 mm

Plaster not Used within from the start of initial mixing shall be discarded.

90 minutes.

Flexural strength of concrete beams shall not be less than when tested by third-point method in accordance with ASSHTO T97.

3.8 MPa

What is the boundary between Coarse and Fine Aggregates for Item 405?

Passing Sieve #4

As specified in Item 500, joint mortar for pipe culverts shall be used within after it's preparation.

30 minutes

For Item 308, asphalt surface mixture shall not be placed when the surface temperature of the base course is;

Below 10°C

The property or ability of asphalt concrete to withstand traffic loads without distortion or defection especially at higher temperatures.

Stability

Laboratory apparatus used to determine the specific gravity of cement.

Le Chatelier flask

What is the minimum test requirements for non-reinforced pipe?

0.5% of no. of pipes, 2 pipes minimum.

Is the limit were further loss of water due to evaporation which will not result in reduction of volume.

Shrinkage Limit

The Contractor shall submit at least in writing a Job-Mix Formula for each mixture supported by laboratory test data along with samples and sources of the components and viscosity temperature relationships information to the Engineer for

At least 3 weeks

Samples of Type I Cement when tested for quality, passed the requirements except for Loss of lgnition. What will you recommend as a Materials Engineer?

Reject the material

As per DPWH Specification, all walls of the abutments shall be provide with weep holes, unless otherwise shown on the plans., the weep holes shall be spaced at not more than center to center in a staggered manner.

When testing cement, the temperature of the mixing water, moist closet or moist room and water in the storage tank shall be at:

23.0土2.0°C

When supervising a project, you noticed that the Contractor was applying more tack coat than the required. Which of the following will most likely occur?

Bleeding

It is load-related deterioration of asphalt pavement resulting from a weak base course, under thickness of pavement layer, overloading, or a combination of these factors.

Fatigue Cracking

A concrete pavement for a National Primary Road registered an International Rough Index (IRI) value of 3.9 m/km. As a Materials Engineer, which of the following will you recommend?

Accept the material at adjusted price

For G.I. Sheets, which of the following provides the highest thickness?

Gauge 24

The minimum length of test specimen regquired for the conduct of Tension Test on Steel Bars;

0.50 m

What type of admixture use to reduce incidence of thermal cracking and to maintain to maintain concrete workability during large pours or long ready-mix hauls?

Retarding water-reducing admixture

When hauled using non-agitating trucks, the time elapsed from the time water is added to the mix per batch until the concrete mix is deposited in place at the site shall not exceed;

45 minutes

These are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain

Geotextiles

In specifying an asphalt material, what does the term 85/100 refer to?

Penetration

A painting project will require 4,640 L of white paint to complete. To accommodate this, the Contractor delivered 205 cans of 20-Lpaint and 135 cans of 4-L paint, respectively. How many quality test shall be conducted?

How many CBR Testis required if the estimated volume of Item 201 materials as per Program of Works is 18,700 cu.m?

Atterberg's limit tests are conducted to determine whether the material passing No. 200 sieve has the characteristics of a clay or a silt. It is also used to determine the plasticity index. Considering these, which of the following statement is TRUE

Higher plasticity index indicates higher degree of compressibility and lower permeability.

Considering only the group index (GI) and other factors as equal, which of the following soil samples will you recommend for use as a subgrade

Soil with computed GI= 0

Which of the following is the proper way of transporting and handling beams and core samples taken from the site to the laboratory for testing?

Packing them in wooden crates surrounded with damp sawdust or palay straw.

Which of the following shall be considered when selecting a filler material to meet the grading requirements for aggregate base course?

It shall not contain more than 15% of material retained on No. 4 sieve

In testing bearing pads, it is found that lack of elastomer to steel bond is indicated. What will you do as a Materials Engineer?

Reject the Material

PE/PI/ME Exam

denis cagomoc · 106問 · 2年前

PE/PI/ME Exam