What does A-4 and A-5 means in the classification of soil?

A set of three (3) core samples has the following compressive strength: 4,000psi, 3,500psi and 2,600psi. If the required stength is 3,500psi, the area represented by the core samples is:

Quality test for portland cement should be carried out for every:

How many pipes should be sampled and tested to represent 125 reinforced concrete pipes?

At what interval shall core samples for compacted asphalt be taken?

Concrete with zero slump means that its water-cement ratio is:

When does the contractor/supplier submit to the project/materials engineer the job-mix formula for bituminous mixes for his approval?

Generally, acceptance of concrete pavement is based upon:

In soil testing, SPT means:

ASTM C-150 requires the the 28-day strength of mortar made from Type I Portland Cements becatvleast 27.6Mpa. Three specimens were tested: two passed but one failed by more than 20%. As Materials Engineer, what will be your conclusion?

For efficient compaction, the embankment materials should at the time pf rolling be:

The purpose of conducting laboratory CBR test on the fill material for embankment is to check:

The consistency of the concrete mixture should be checked by means of:

Specimen for compresive or flexural strength test shall be removed from the molds st the end of 24 hours and stored in a moist condition at a temperature range____ until the time of rest

What does grade of steel bars mean

It is a type of emulsified asphalt that the works better with wet aggregates and in cold weather

What apparatus measures the time of setting of hydraulic Portland Cement?

Which pf the following factors does not affect the strength of concrete cores drilled from structures?

If permitted by the engineer, additional water may be added to the batch concrete materials in truck mixers for Portland Cement Concrete Pavement. Additional mixing may be performed to increase the slump to meet the specified requirements provided that the water-cement ration is not exceeded and that the said operations are performed within ____ minutes after the initial mixing operation.

If beam samples taken from a newly paved section failed to meet the strength requirement and it is not advisable to obtain cores from the structure due to structural considerarions, as Materials Engineer what will you do if the defeciency in strength ofcthe concrete specimen is 15%?

Good subgrade soil shoud have a:

Geosysnthetics may be used for

The result of the Immersion/compression test concluded on an asphalt mix sample are as follows: Dry stability= 2,000 kpa Wet stability= 1,000 kpa

Unconfined compresive strength test is usually performed on:

The latest state of the art apparatus used to measure the moisture content and density of soils, soil-stone aggregate, cement and asphalt treated bases and asphalt surfacing is:

In embankment formation, a Field Density Test is required in every compacted fill layer for every:

Portland cement is so called because:

From the materials point of view subgrade construction consist mainly of:

The California Ratio (CBR) value indicates:

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

Aggregates for concrete mixes are classified whether fine or coarse aggregates. Which sieve used to separate fine from coarse aggregates?

In concrete pavent construction concrete mix was not placed within 1 hour and 50 minutes. What should the Materials Engineer recommend?

The minimum testing requiemet of the bituminous mix is one quality test every ____ tonnes or fraction therof:

How do you obtain the density of soil in the field?

The approval of preliminary samples from the same source shall:

The frequency of sampling and testing for compacting subbase material is:

The proper and accurate measurement of all materials used in the production of concrete to ensure uniformity and aggregate grading is called:

A subgrade with CBR value of / or less is considered as:

Sample for CBR test is soaked for ___ hours before subjecting it to the penetration test.

The specific geavity of cement that may be used in concrete mx design is:

What is the function of emulsifiers in liquid asphalt

Given: Bulk volume of asphalt specimen = 500cc Weight of dry specimen in air = 1,200 grams Calculate the bulk specific gravity of the asphalt specimen

In conducting an abrasion test, the required number of steel balls under Grading B is:

what differentiates the composition of item 201 - Aggregates Base Course from Item 200 - Aggregates Subbase Course?

Concrete curing refers to:

What is the minimum test requirement for riprap boulders?

The moisture density curve is different for each soil. Which of the following statements is/are true?

What test determined the crushing of stregth of aggregates to ensure that coarse aggregates will not degrade to smaller ones.

What depth of weakened joint should at all times not be less than

Cores are taken from a concrete pavement and tested for

In accepting completed concrete pavement poured by lane thickness determinatio shall come out by obtaining one core from every:

the flexural strength requirements of item 311 is

the number of sets of beam test specimen that should be taken from 700 sq.m. of concrete pavements, 0.23 m thick poured on a single day should be:

forms for concrete pavement shall remain in place undisturbed for not less than:

the Ph value of water that is acceptable for use in concrete mix is

how many measurements are needed for thickness determination of concrete cores?

what is the single factor that determines the strength pf concrete?

what is the curved formed on a maximum dry density and optimum moisture content graph?

which of the following is accepted for concrete with fc at 28 days of 3500 psi?

what is the strength for load bearing hollow blocks?

what is the single factor that determines the strength of concrete?

the role of application of prime coat before asphalt overlaying is

the most commonly used method in the design and evaluation of bituminous concrete mixes

which of the dollowing penetration grade of asphalt is used in cold climate?

if sea water is used in a concrete mix, what will be the effect on the hardened concrete pavement?

the job mix formula contain the following provision except:

the grade designation of a reinforcing steel bars is also its

which of the following is not an engineering property of granular soil?

peat is an example of

which of the following is an engineering property of fine grained soil?

the dividing size between coarse and fine aggregates used in asphalting is

the objective of designing the asphalt mixture is determination of:

the sample of reinforcing steel bars for every 10,000 kgs shall be

the variation on tolerance of the surface from the testing edge of the straight edge in contact with the surface of asphalt pavement is

the specific irregularity tolerance for item 201 is

which of the following is not thw job for a materials engineer?

which is true on conducting of a slump test?

renforced concrete pipe culverts are tested for compressive strength to produce ____ crack.

the bituminous materials commonly used in item 310 is

item 310 mixture shall have an index of retained strength of not less than

final conpaction and smoothing of item 310 should be done by a

item 310 mixture shall be delivered to the paver at a temperature not less than

in the asphalting of a two lane, 500 meter road which lasted for three days, how many core samples should be taken from the pavement if no sample was taken at the end of each days?

which of the following provisions is not included in the job-mix formula

a bituminous mix subjected to immersion-compression test yielded a dry stability pf 2.0 kg and a wet stability of 1.5 kg. the index of retained strength f the mixe is:

in item 310, bitumen content, expressed in terms pf percentage by mass pf aggregates, shall be

in the asphalting of a 3-meter wide, 200 meter long road lane, a core was obtained and tested to have a thickness of 5 cm. and a density pf 2.25 gm/cm3 the quantity of bituminous mix to be

after final rolling, the compacted asphalt pavement shall have a density equal top, or greater than % of the laboratory compacted density.

scales for weighing aggregates and cement shall be accurate within % throughout the range of use. scales shall be inspected and sealed as often as the engineer may deem necessary to

when cement is placed in contact with the aggregates, batches maybe rejected unless mixed within ___ hours of such contact

when mixed at the site or in a central mixing plant, the mixing time not less than ___ nor more than ___unless mixer performance test prove adequate mixing of conrete in a shorter time period.

the flow pf water shall be uniform and all water should be in the drum by the end of the first ___ seconds of the mixing period

concrete not place within ___ minute from the time the ingredients were charged into the mixing drum shall not be used.

the minimum penetration of the preservative with the surface of the timber piles shall be ___.

this is used in soil stabilized road surface die to its high ___ property, that is it absorb and retain water.

the mass % of soil aggregates used in cement/lime proportions should not be more than ___.

the uniform rate at which the movable head of CBR machine tray is___.

cast in place concrete shall not be post-tensioned until at least ___ and until the compressive strength has reached the strength specified

the penetration test is an indication of the ___ of asphalt

specification requires one (1) quality test for every ___ of asphalt