Test 2 Review

Which of the following is a method to maintain the presence of mixing water in the concrete during the early hardening period A. screed the concrete immediately B. use retarders C. use ponding D. use superplasticizers

C. Use ponding

Question 1 Asphalt is following type of material: A. Elastic B. Viscous C. Viscoelastic D. Plastic?

C. Viscoelastic

For pumping concrete with low w/c ratio, following ingredient is added in the concrete: A. More water B. Retarding admixture C. Water reducer D. Air entrainer

C. Water reducer

Which of the following binders will be more resistant to rutting and cracking for wider variation of temperatures? A. PG 64-22 B. PG 70-28 C. PG 58-22 D. PG 70-34

D. 70-34

What is the weight range of light weight concrete? A. 165 ? 195 lb/ft^3 B. 55 ? 85 lb/ft^3 C. 125 ? 155 lb/ft^3 D. 85 - 115 lb/ft^3

D. 85-115

Following is not one of the main compounds of Portland cement? A. Tricalcium silicate B. Dicalcium silicate C. Tricalcium aluminate D. Alkalis E. Gypsum

D. Alkalis

Concrete continues to increase in strength as long as: A. any unhydrated cement is present B. the concrete temperature remains favorable C. the concrete remains moist or has a relative humidity above approximately 80% D. all of the above

D. All of the above

What is segregation of concrete? A. Coarse aggregate separating out or settling down from the rest of the mix B. Paste separating away from coarse aggregate C. Water separating out from the rest of the material being a material of lowest specific gravity D. All of the above

D. All of the above

What happens to the concrete when the alkali-silica reaction occurs? A. the concrete doesn't cure B. the top of the concrete is weak and has poor durability C. the concrete develops excellent tensile strength D. excessive cracking occurs

D. Excessive cracking

What is the main characteristic of self-consolidating concrete? A. low amount of cement B. very durable C. very small aggregates D. highly flowable

D. Highly flowable

The chemical process by which concrete cures and hardens is known as: A. tempering B. polymerization C. annealing D. hydration

D. Hydration

What is the advantage of using fibers in concrete? A. none of the above B. lower cost C. improves workability D. improves flexural strength

D. Improves flexural strength

Which type of concrete is an excellent choice for draining water in a parking lot? A. polymer concrete B. flowable fill C. shotcrete D. pervious concrete

D. Pervious

Which of the following admixtures is used to gain workability to minimizing the water used and, at the same time, maintain the quality of the concrete? A. retarders B. accelerators C. granulated slag D. superplasticizers

D. Superplasticizers

The type of cement that keeps the heat of hydration lower in a concrete mix is: A. Type I B. Type II C. Type III D. Type IV

D. Type IV

The type of cement typically used in the massive structures such as dams is: A. Type I B. Type II C. Type III D. Type IV

D. Type IV

RAP (Reclaimed asphalt pavement) is most recycled product in the world. TrueFalse

True

Strength of concrete cured in air entire time is 50% of the strength of concrete cured in water entire time. True/False

True

Modern dry process cement plants use a heat recovery cycle to preheat the ground material, or feed stock, with the exhaust gas from the kiln for improving the energy efficiency of cement production. A. TrueB. False

A. True

Roller compacted concrete is no slump concrete. A. TrueB. False

A. True

Stamping is creating patterns in the concrete for better appearance. A. TrueB. False

A. True

What is the most common use of shotcrete? A. tunnels B. retaining wall C. dams D. foundations

A. Tunnels

Setting of cement is defined as A. Gaining strength B. Change from plastic/workable to solid state C. Hydration of cement D. None of the above

B. Change from plastic/workable to solid state

Subgrade of a pavement consists of following A. Aggregates B. Compacted foundation soil C. Asphalt concrete mix D. Granular sand

B. Compacted foundation soil

Which asphalt product (emulsion or cutback) is more environmental-friendly? A. Asphalt cement B. Emulsion C. Cutback asphalt D. all of the above

B. Emulsion

Which of the following is a by-product of the coal industry (thermal power plant) and is the most commonly used pozzolan in civil engineering structures? A. calcium chloride B. fly ash C. granulated slag D. silica fume

B. Fly Ash

Type III Portland cement is similar to Type I cement only the cement is ground much finer. Greater cement fineness is most closely related to: A. increased water tightness B. high-early strength C. slower hydration D. improved air entrainment

B. High Early strength

Which is NOT one of the ingredients of flowable fill? A. cement B. lime C. sand D. fly ash E. admixtures

B. Lime

A method to determine the viscosity or consistency of concrete is by conducting a: A. compression test B. tensile test C. slump test D. silt test

C. Slump Test

Too many roller passes will increase the density of the pavement. True/False

False

Reinforcing steel is added to structural concrete members to increase the: A. tensile strength B. water tightness C. compressive strength D. abrasion resistance

A. Tensile strength

What is the compressive strength of high strength concrete? A. >10,000 psi B. 20,000 psi C. >15,000 psi D. >5,000 psi

A. 10,000 psi

What is the weight of heavy weight concrete? A. 400 lb/ft^3 B. 150 lb/ft^3 C. 300 lb/ft^3 D. 250 lb/ft^3

A. 400

Which admixture will help prevent concrete from breaking up due to freeze-thaw conditions? A. Air Entrainment B. Slag C. Calcium chloride D. Fly Ash

A. Air Entrainment

Which of the following is a blended or pozzolan cement? A. blast-furnace slag cement B. air entrained cement C. white portland cement D. Type II cement

A. Blast furnace slag

When concrete is mixed completely in a stationary mixer and is delivered in a ready mix truck it is referred to as: A. central-mixed concrete B. high-energy mixed concrete C. re-mixed concrete D. truck-mixed concrete

A. Central-mixed concrete

Which of the following alternative concretes would be used in difficult to reach locations and does not require compaction? A. flowable fill B. polymer concrete C. roller compacted concrete D. light weight concrete

A. Flowable fill

Which of the following admixtures is commonly used to reduce the amount of cement used and the cost of the concrete? A. fly ash B. silica fume C. calcium chloride D. gypsum

A. Fly Ash

How pervious concrete is different than traditional concrete? A. Has no or little amount of sand B. Has no or little amount of additive C. Has no or little amount of aggregates D. Has no or little amount of cement

A. Has no or little amount of sand

Which of the following types of water can be used to satisfactorily make concrete without having to be tested for its effect on strength and time of set? A. potable water B. water containing algae C. seawater D. drain water

A. Potable water

Mortar or concrete that is pneumatically projected onto a surface at high velocity to construct structures like swimming pools and tunnels is known as: A. shotcrete B. flowable fill C. pozzolan D. high strength concrete

A. Shotcrete

For a project approximately 200 cubic yard concrete mix is needed. Which method is most suitable for producing concrete mix? A. Use concrete produced in a ready mix plant and delivered in an agitator truck B. Use partially mixed concrete in plant and transported in a mixer truck C. Use concrete completely mixed in a mobile plant D. All of the above

A. Use concrete produced in ready mix plant delivered in agitator

What is the water-cement ratio for a concrete mix with 650 lbs. of cement, 1700 lbs. course aggregate, 1200 lbs. fine aggregate, and 300 lbs. of water? A. 0.40 B. 0.46 C. 0.50 D. 1.20

B. 0.46

How many tons of asphalt concrete will be required to overlay a 3-mile-long, 12-ft-wide road with 2.5 inch of wearing course asphalt concrete that has a density of 146.3 pcf? (Note: 1 mile = 5280 ft) A. 1857 tons B. 2897 tons C. 4867 tons D. 5897 tons

B. 2897

What is the benefit of cutback asphalt and emulsion over asphalt cement? A. Economical B. Applied at lower temperature C. Provides more strength D. none of the above

B. Applied at lower temperature

Following pavement is classified as full-depth pavement: A. Asphalt mix surface with regular aggregate base B. Asphalt mix surface with asphalt-aggregate mix base C. Asphalt mix surface with cement concrete base D. None of the above

B. Asphalt mix surface with asphalt-aggregate mix base

What is the correct order of operations involved in conventional Portland cement concrete? A. Batching -> Mix design -> Mixing/Transporting -> Placing -> Finishing -> Curing B. Mix design -> Batching -> Mixing/Transporting -> Placing -> Finishing -> Curing C. Mix design -> Mixing/Transporting -> Batching -> Placing -> Finishing -> Curing D. Batching -> Mixing/Transporting -> Mix design -> Placing -> Finishing -> Curing

B. Mix design -> Batching -> Mixing/Transporting -> Placing -> Finishing -> Curing

Which one of the following is NOT a good candidate for whitetopping? A. none of the above B. old concrete floor of an indoor garage C. old cracked pavement D. cracked parking lot

B. Old concrete floor of an indoor garage

Which of the following IS NOT a necessary part of a conventional concrete mix? A. cement B. pigment C. water D. aggregate E. sand

B. Pigment

If concrete is poured in very hot weather, following ingredient is added in the concrete: A. More water B. Retarding admixture C. Water reducer D. Air entrainer

B. Retarding admixture

How shotcrete is different than traditional concrete? A. all of the above B. smaller aggregates in shotcrete C. no sand in shotcrete D. low amount of cement in shotcrete

B. Smaller aggregates

What is the correct sequence of pavement compaction? A. Pneumatic tired rolling, then, Nonvibratory steel wheeled rolling, then, Steel wheeled vibratory rolling B. Steel wheeled vibratory rolling, then, Pneumatic tired rolling, then, Nonvibratory steel wheeled rolling C. Nonvibratory steel wheeled rolling, then, Pneumatic tired rolling, then, Steel wheeled vibratory rolling D. Steel wheeled vibratory rolling, then, Nonvibratory steel wheeled rolling, then, Pneumatic tired rolling

B. Steel wheeled vibratory rolling, then, Pneumatic tired rolling, then, Nonvibratory steel wheeled rolling

Which of the following is the most widely used methods of measuring air content in fresh concrete and the one that you were shown in class? A. The gravimetric method B. The pressure method C. The volumetric method D. The chase air indicator method

B. The pressure method

What type of cement should be used when the concrete is exposed to moderate sulfate attack in the water? A. type IV cement B. type II cement C. type III cement D. plastic cements

B. Type II

How compaction density of asphalt is monitored during construction? A. Collecting samples and testing in lab B. Using nuclear density gauge C. Using infrared camera D. none of the above

B. Using nuclear density gauge

Tests used for determining setting time of cement are: A. Compressive strength test B. Vicat and Gillmore test C. Slump and Workability test D. Pressure and Chace Air Indicator test

B. Vicat and Gilmore test

Portland cement clinker is made by heating, in a kiln, a homogeneous mixture of raw materials to a temperature of A. 500 - 1000oC B. 1000 - 1250oC C. 1400 - 1650oC D. None of the above

C. 1400-1650 C

You perform a standard Penetration Test at 77oF (25oC) on a sample of asphalt cement submitted to your laboratory for Penetration grading. The needle penetrates the sample 9.2 mm. (a) What is the penetration value of the asphalt in "penetration units"? A. 0.92 B. 9.2 C. 92 D. 920

C. 92 (9.2 x 10)

Which of the following admixtures is used to increase the rate of strength gain in the concrete and reduce the curing time? A. air entrainment B. retarders C. accelerators D. air entrainers

C. Accelerators

Which of the following asphalt mixes is most suitable for patching potholes on less-trafficked roads: A. Hot mix asphalt B. Warm mix asphalt C. Cold mix asphalt D. All of the above

C. Cold mix asphalt

Following is NOT a mechanical operation used for finishing concrete: A. screeding B. floating C. fogging D. troweling

C. Fogging

Following is not a typical raw material used for Portland cement: A. gypsum B. limestone C. gravel D. clay

C. Gravel

The primary role of the matrix in a fiber-reinforced composite is to: A. provide resistance to chemical attack B. bond or combine the reinforcement material C. improve the ductility of the material D. improve the hardness of the material

C. Improve the ductility

Why brooming of a freshly prepared concrete pavement surface is important? A. Improves strength B. Improves durability C. Improves slip-resistant D. Improves appearance

C. Improves slip-resistant

Which of the following type of screeds is suitable for sloped concrete surfaces? A. Hand B. Vibratory C. Laser

C. Laser

What is the disadvantage of using polymers in concrete? A. low strength B. all of the above C. lowered heat resistance D. lower workability

C. Lowered heat resistance

Self-consolidating concrete is measured for slump by: A. measuring vertical deformation of cone B. none of the above C. Measuring spread on a mat D. Measuring time to flow through cone

C. Measuring spread on a mat

Which of the following is a curing method that prevents loss of mixing water from the concrete by sealing the surface? A. electrically heated pads B. saturated wet coverings C. membrane-forming curing compounds D. ponding E. both b and d

C. Membrane-forming curing compounds

Which of the followings in not one of the constituents of conventional asphalt? A. Aspaltenes B. Resins C. Polymer D. Oils

C. Polymer

Gypsum is added to the cement to: A. decrease the weight of the concrete B. improve the tensile strength of the concrete C. regulate the setting time D. reduce the amount of water needed

C. Regulate the setting time

What is the ASTM standard size (according to specification) of cylinders prepared for strength test of concrete? A. 3" x 6" B. 2" x 4" C. 4" x 10" D. 6" x 12"

D. 6 x 12

As an inspector on road construction project, what is important to record during the delivery of asphalt mix truck? A. Make sure the truck is not overloaded B. Time mix received C. location at which mix was placed D. temperature of the mix E. all of the above

E. All of above

Following is NOT one of the main advantages of using roller compacted concrete: A. placed quickly B. low heat of hydration C. less formwork and labor D. high speed production E. produces very high strength

E. Produce very early strength

For better control on proportions of different ingredients of concrete, batching by volume is preferred over batching by weight. TrueFalse

False

Longitudinal joints are rolled at the end regardless of their location. True/False

False

Non-potable water requirment?

Must be at least 90% of potable water strength

A tack coat is a thin layer of emulsion or cutback asphalt applied between pavement layers which act as a glue (or promote bonding) between layers. True/False

True

Air void is important in asphalt mixes to accommodate viscosity changes of binder under load and temperature. TrueFalse

True

Asphalt cement is pure asphalt and asphalt binder includes both neat asphalt cement and modified asphalt cement made by adding polymers for improving properties of asphalt. True/False

True

Asphalt mix is considerably different than other materials such as cement concrete as its properties are very sensitive to temperature, rate of loading and aging. True/False

True

Excess water in concrete improves workability but decreases durability and strength. A. TrueB. False

True

Floating is to level and fill voids left by screeding and closes the surface. True/False

True