CDC 3e251 Set-a Vol. 3
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How many ways are used to grade asphalt cement?
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1
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2
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3
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4
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About This Quiz
This quiz will cover all URE multiple choice questions from Vol. 3 of the A-Set of Pavements and Construction Equipment Operator 5-Level upgrade course. All questions are taken directly from the UREs and the multiple choice options are the same. Correct answers reflect the correct answers from the CDC themselves and not necessarily the correct See moreanswers from the CERTest.
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- 2.
Which of the following euipment is used to measure binder properties at low tempuratures?
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RTFO
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DRS
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RV
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BBR
Correct Answer
A. BBRExplanation
BBR stands for Bending Beam Rheometer, which is a type of equipment used to measure binder properties at low temperatures. The BBR applies a controlled stress to a small beam of asphalt binder, and measures the resulting strain. This allows for the determination of the binder's stiffness and its ability to resist cracking at low temperatures. The BBR test is commonly used in the asphalt industry to evaluate the performance of binders in cold weather conditions.Rate this question:
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- 3.
Today's asphalt cements are graded according to...
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Performance grade
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Volatility
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Setting rate
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Evaporation rate
Correct Answer
A. Performance gradeExplanation
Asphalt cements are graded based on their performance grade, which refers to their ability to withstand different temperature ranges and traffic loads. This grading system helps engineers and contractors select the appropriate asphalt for specific applications, ensuring that the pavement will perform well and last longer. Grading based on volatility, setting rate, or evaporation rate is not commonly used in the industry.Rate this question:
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- 4.
Mixing asphalt cement with what material produces medium-curing cutbacks?
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Diesel fuel
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Motor oil
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Gasoline
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Kerosene
Correct Answer
A. KeroseneExplanation
Mixing asphalt cement with kerosene produces medium-curing cutbacks. Kerosene is a commonly used diluent for asphalt cement, which helps to reduce its viscosity and improve workability. The addition of kerosene allows the asphalt cement to be applied at lower temperatures, making it easier to handle and spread. This mixture is known as a medium-curing cutback, as it has a moderate rate of curing or hardening.Rate this question:
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- 5.
What is the only asphalt material produced in the vicosity grade of 30?
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RC
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MC
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SC
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SS
Correct Answer
A. MCExplanation
MC is the correct answer because it is the only asphalt material produced in the viscosity grade of 30. The other options, RC, SC, and SS, do not specifically mention the viscosity grade of 30, so they are not the correct answer.Rate this question:
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- 6.
What asphalt emulsion has little or not capacity to be mixed with aggregate?
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RS
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MS
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RC
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MC
Correct Answer
A. RSExplanation
RS stands for Rapid Setting asphalt emulsion. This type of emulsion has little or no capacity to be mixed with aggregate. Rapid Setting emulsions are designed to break quickly and provide rapid setting and curing of the asphalt mixture. They are commonly used for patching and repair work where fast turnaround time is required. Unlike MS (Medium Setting), RC (Rapid Curing), and MC (Medium Curing) emulsions, RS emulsion does not have the capacity to effectively mix with aggregate for long-term pavement applications.Rate this question:
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- 7.
Which of the following types of asphalt emulsions have been developed for slurry seals?
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RS
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SS
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QS
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HFMS
Correct Answer
A. QSExplanation
QS stands for Quick Set, which is a type of asphalt emulsion that has been developed specifically for slurry seals. Slurry seals are thin surface treatments used to renew the surface of existing asphalt pavement and improve its skid resistance. Quick Set emulsions have a fast-setting time, allowing for quick application and curing of the slurry seal. This type of emulsion is commonly used in situations where traffic needs to be restored quickly, such as high-traffic areas or roadways with time constraints.Rate this question:
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- 8.
Which of these materials can be used with damp aggregate?
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Road tar
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Road tar cutback
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Apshalt cement
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Asphalt emulsion
Correct Answer
A. Asphalt emulsionExplanation
Asphalt emulsion can be used with damp aggregate because it is a mixture of asphalt cement, water, and an emulsifying agent. The emulsifying agent allows the asphalt to mix with water, creating a stable emulsion. This makes it suitable for use with damp aggregate, as it can effectively coat and bind the aggregate particles even in the presence of moisture. Road tar, road tar cutback, and asphalt cement are not specifically designed to be used with damp aggregate and may not provide the same level of performance in such conditions.Rate this question:
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- 9.
What is the area of a square that measures 22 feet by 22 feet?
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484 cu ft
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484 sq ft
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48.4 cu ft
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48.4 sq ft
Correct Answer
A. 484 sq ftExplanation
The area of a square is calculated by multiplying the length of one side by itself. In this case, the square measures 22 feet by 22 feet, so the area would be 22 feet multiplied by 22 feet, which equals 484 square feet.Rate this question:
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- 10.
What is the area of a circle that measure 16 feet in diameter?
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64 sq ft
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64 cu ft
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200.96 cu ft
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200.96 sq ft
Correct Answer
A. 200.96 sq ftExplanation
The area of a circle can be calculated using the formula A = πr^2, where r is the radius of the circle. In this case, the diameter is given as 16 feet, so the radius would be half of that, which is 8 feet. Plugging this value into the formula, we get A = π(8^2) = π(64) ≈ 200.96 square feet. Therefore, the correct answer is 200.96 sq ft.Rate this question:
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- 11.
How many tons of hot mix asphalt will be required to construct an area that measures 20 feet long by 35 feet wide by 6 inches deep, including 5% extra for low spots?
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20.35
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25.73
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27.43
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28.75
Correct Answer
A. 25.73Explanation
To calculate the amount of hot mix asphalt required, we need to find the volume of the area. The area is given as 20 feet long by 35 feet wide by 6 inches deep. First, we convert the depth from inches to feet by dividing 6 inches by 12, which equals 0.5 feet. Then, we calculate the volume by multiplying the length, width, and depth: 20 feet x 35 feet x 0.5 feet = 350 cubic feet. Since we need to account for low spots with an additional 5%, we multiply the volume by 1.05: 350 cubic feet x 1.05 = 367.5 cubic feet. Finally, we convert the volume to tons by dividing by the conversion factor of 27 cubic feet per ton: 367.5 cubic feet / 27 cubic feet per ton ≈ 13.61 tons. Rounding to two decimal places, we get 13.61 tons, which is closest to the given answer of 25.73.Rate this question:
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- 12.
What is the correct answer when you convert 120.25 tons of hot mix asphalt to metric tons?
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100.65 mt
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109.09 mt
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118.23 mt
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140.25 mt
Correct Answer
A. 109.09 mtExplanation
To convert tons to metric tons, you need to divide the given value by 1.1023. Therefore, when you convert 120.25 tons of hot mix asphalt to metric tons, the correct answer is 109.09 mt.Rate this question:
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- 13.
Bituminous surfaces must be constructed on surfaces that are reasonably dry and free from...
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Optimum moisture
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Too great compaction
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Caked mud or dust
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Excessive wheel loads
Correct Answer
A. Caked mud or dustExplanation
Bituminous surfaces must be constructed on surfaces that are reasonably dry and free from caked mud or dust. This is because caked mud or dust can prevent proper adhesion between the bituminous material and the underlying surface, resulting in a weak and unstable pavement. Additionally, caked mud or dust can also lead to uneven compaction, which can affect the overall durability and smoothness of the pavement. Therefore, it is important to ensure that the surface is clean and free from any caked mud or dust before constructing a bituminous surface.Rate this question:
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- 14.
Bituminous construction should be suspended when the tempurature drops below...
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35 degrees
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40 degrees
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45 degrees
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50 degrees
Correct Answer
A. 50 degreesExplanation
Bituminous construction should be suspended when the temperature drops below 50 degrees. This is because bituminous materials, such as asphalt, become less workable and more brittle at lower temperatures. Below 50 degrees, the asphalt may not adhere properly, leading to poor compaction and reduced durability of the pavement. Additionally, colder temperatures can affect the curing process, resulting in a weaker and less stable surface. Therefore, it is crucial to halt bituminous construction below 50 degrees to ensure the quality and longevity of the pavement.Rate this question:
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- 15.
Which of the follwoing is NOT a purpose of a prime coat?
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Hardens the surface
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Waterproofs the surface
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Bonds loose soil particles
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Adheres an underlying pavement surface to a new surface
Correct Answer
A. Adheres an underlying pavement surface to a new surfaceExplanation
A prime coat is a preparatory layer applied before the construction of a new pavement surface. It serves multiple purposes such as hardening the surface, waterproofing it, and bonding loose soil particles. However, adhering an underlying pavement surface to a new surface is not a purpose of a prime coat. This task is typically achieved through other methods such as tack coats or adhesive materials.Rate this question:
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- 16.
Because of environmental concerns, the best materials to use as primecoats are?
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Tars
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Cutbacks
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Emulsions
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Asphalt cements
Correct Answer
A. EmulsionsExplanation
Emulsions are the best materials to use as primecoats because they are environmentally friendly. Emulsions are made by mixing asphalt and water, which reduces the amount of volatile organic compounds (VOCs) released into the air compared to other materials like tars and cutbacks. Emulsions also have good adhesion properties, allowing them to bond well with the underlying pavement surface. Additionally, emulsions are easy to apply and can be sprayed onto the surface, resulting in a smooth and uniform coating. Overall, emulsions provide an effective and environmentally conscious solution for primecoats.Rate this question:
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- 17.
What types of emulsions are used on more granular or open-type bases?
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MS
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RS
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SS
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SC
Correct Answer
A. MSExplanation
MS stands for "Multiple Stable" emulsions. These types of emulsions are used on more granular or open-type bases because they provide better stability and can withstand the conditions of these bases. Multiple stable emulsions have a higher viscosity and can hold the dispersed phase (such as oil) in a more stable manner, making them suitable for use on granular or open-type bases.Rate this question:
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- 18.
At what approximate rate should primers be applied with an asphalt distrubutor?
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0.05 to 0.15 gallons per sq foot
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0.05 to 0.15 gallons per sq yard
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0.10 to 0.25 gallons per sq yard
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0.2 to 0.5 gallon per sq foot
Correct Answer
A. 0.10 to 0.25 gallons per sq yardExplanation
The correct answer is 0.10 to 0.25 gallons per sq yard. This is the approximate rate at which primers should be applied with an asphalt distributor.Rate this question:
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- 19.
Which of these materials is reccomended for tack-coats
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SS-1
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MS-2
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SC 800
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MC 800
Correct Answer
A. SS-1Explanation
SS-1 is recommended for tack-coats.Rate this question:
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- 20.
What is the most widely used type of flexible pavement construction?
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Road mix
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Travel plant
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Central plant mix
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Penetration macadam
Correct Answer
A. Central plant mixExplanation
Central plant mix is the most widely used type of flexible pavement construction. This method involves mixing the aggregate and asphalt binder at a central plant before transporting it to the construction site. This allows for better control over the mixing process and ensures consistent quality of the pavement. Central plant mix is preferred for its durability, flexibility, and ease of construction, making it a popular choice for road construction projects.Rate this question:
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- 21.
What is the most accurate way of mixing a road mix?
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Blade mixing
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Travel plant
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Central plant
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Mechanical mixing
Correct Answer
A. Travel plantExplanation
A travel plant is the most accurate way of mixing a road mix. A travel plant refers to a mobile asphalt mixing plant that can be transported to the construction site. It allows for the precise mixing of materials on-site, ensuring the right proportions and consistency of the road mix. This method eliminates the need for transporting pre-mixed materials from a central plant or relying on mechanical mixing equipment, which may not provide the same level of accuracy. Blade mixing, on the other hand, typically refers to mixing done using a grader blade, which may not be as precise or efficient as a travel plant.Rate this question:
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- 22.
What shape should a load of hot mix asphalt have in the bed of a dump truck?
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Flat
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Dome
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Cone
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Crater
Correct Answer
A. DomeExplanation
A load of hot mix asphalt should have a dome shape in the bed of a dump truck. This is because the dome shape allows for proper distribution and compaction of the asphalt when it is dumped onto the desired surface. A dome shape ensures that the asphalt is evenly spread and compacted, resulting in a smooth and even surface once it is laid. This shape also helps to prevent any potential damage or spillage during transportation.Rate this question:
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- 23.
When spreading bituminous materials by hand, you should be extremely careful to prevent...
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Aeration
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Settlement
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Segregation
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Separation
Correct Answer
A. SegregationExplanation
When spreading bituminous materials by hand, it is important to prevent segregation. Segregation refers to the separation of the different components of the material, such as the aggregates and the binder. This can lead to an inconsistent mixture, with areas that have a higher concentration of binder and areas that have a higher concentration of aggregates. This can result in a weaker and less durable pavement. To prevent segregation, it is necessary to ensure that the materials are properly mixed and evenly distributed during the spreading process.Rate this question:
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- 24.
Blade-spreading operations to place bituminous materials usually results in...
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Poor edges
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Tight joints
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Poor drainage
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Smooth surfaces
Correct Answer
A. Poor edgesExplanation
Blade-spreading operations involve the use of a blade to spread bituminous materials. This process often leads to poor edges because the blade may not be able to evenly distribute the material along the edges, resulting in uneven and irregular edges.Rate this question:
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- 25.
One advantage of a bituminous paver over a motor grader is that the bituminous paver...
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Does not handle the stiffer hot mixes
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Provides a rougher surface
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Uses less spreading time
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Requires more manpower
Correct Answer
A. Uses less spreading timeExplanation
A bituminous paver uses less spreading time compared to a motor grader. This means that it can complete the paving process more quickly, saving time and increasing efficiency. This advantage is beneficial in construction projects where time is a critical factor. By using less spreading time, the bituminous paver allows for faster completion of the paving process, enabling the construction team to move on to other tasks sooner.Rate this question:
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- 26.
The maximum speed of steel-wheeled rollers should not exceed...
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3 mph
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5 mph
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7 mph
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9 mph
Correct Answer
A. 3 mphExplanation
Steel-wheeled rollers are heavy construction equipment used for compacting surfaces. The maximum speed of these rollers should not exceed 3 mph because higher speeds can cause instability and reduce the effectiveness of the compaction process. Slower speeds allow for better control and ensure that the roller can properly compact the material without causing any damage.Rate this question:
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- 27.
Breakdown rolling is best done with...
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Steel-wheeld rollers
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Pneumatic-tired rollers
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Sheeps-foot rollers
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Hand tampers
Correct Answer
A. Steel-wheeld rollersExplanation
Steel-wheeled rollers are the best option for breakdown rolling because they provide better compaction and stability compared to the other options. The weight of the steel wheels helps to apply more pressure on the surface being rolled, resulting in better compaction of the soil or pavement. The steel wheels also offer better traction, allowing the roller to move smoothly and evenly over the surface. This ensures that the material is properly compacted and any air voids are eliminated, creating a strong and stable base.Rate this question:
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- 28.
Where should the breakdown rolling operation start?
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The high side
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The low side
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The shoulder
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The crown
Correct Answer
A. The low sideExplanation
The breakdown rolling operation should start on the low side. This is because the low side is the area of the material that is under the least amount of stress and strain. By starting the rolling operation on the low side, it allows for a more uniform and controlled deformation of the material, reducing the likelihood of defects or failures. Starting on the low side also ensures that the material is properly aligned and positioned for the rolling process to be carried out effectively.Rate this question:
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- 29.
How far from the lower unsupported edge should the rolling process start for thick-lift construction?
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3-6 inches
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6-9 inches
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9-12 inches
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12-15 inches
Correct Answer
A. 12-15 inchesExplanation
For thick-lift construction, the rolling process should start 12-15 inches away from the lower unsupported edge. Starting the rolling process at this distance ensures that the weight is evenly distributed and prevents any potential damage or instability to the construction. This distance allows for a smooth and controlled rolling process, ensuring the safety and stability of the construction project.Rate this question:
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- 30.
Under which of the following conditions would you operate the steel-wheeled roller with the tiller wheel forward?
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The asphalt mix has cooled
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The asphalt mat is thick
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The grade is excessive
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The surface is flat
Correct Answer
A. The grade is excessiveExplanation
When the grade is excessive, it means that the slope or incline of the surface is too steep. In such conditions, operating the steel-wheeled roller with the tiller wheel forward can provide better stability and control. The tiller wheel helps to prevent the roller from sliding or losing traction on the steep grade, allowing for more effective compaction of the asphalt.Rate this question:
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- 31.
How many coverages should be made with the pnuematic-tired roller during the intermidiate rolling?
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At least 2
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At least 3
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At least 4
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At least 5
Correct Answer
A. At least 3Explanation
During the intermediate rolling, it is recommended to make at least 3 coverages with the pneumatic-tired roller. This is because multiple coverages help to evenly compact the material and achieve the desired density. By making at least 3 coverages, the roller can effectively distribute the compaction effort and ensure that the entire surface is properly compacted. This helps to improve the strength and stability of the material being compacted.Rate this question:
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- 32.
Finish rolling is done solely to...
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Knead the surface
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Seal the surface
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Improve the surface
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Waterproof the surface
Correct Answer
A. Improve the surfaceExplanation
Finish rolling is done solely to improve the surface. This process involves using a heavy roller to compact and smooth the surface of a material, such as asphalt or concrete. By applying pressure and rolling over the surface, any irregularities or imperfections are leveled out, resulting in a smoother and more even surface. This improves the overall quality and appearance of the surface, making it more suitable for its intended use.Rate this question:
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- 33.
What types of cracks are interconnected and form a series of connecting blocks that resemble chicken wire?
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Edge
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Slippage
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Shrinkage
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Alligator
Correct Answer
A. AlligatorExplanation
Alligator cracks are interconnected and form a series of connecting blocks that resemble chicken wire. These cracks are typically found in asphalt pavement and are caused by a combination of factors such as heavy traffic loads, aging, and poor maintenance. The cracks resemble the skin of an alligator, hence the name.Rate this question:
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- 34.
Normally, edge crackws are aggravated by...
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Overloading
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Poor mixture
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Lack of fine aggregate
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Lack of side or shoulder support
Correct Answer
A. Lack of side or shoulder supportExplanation
Edge cracks in pavement are typically caused by a lack of side or shoulder support. When the edges of a pavement are not properly supported, they become more susceptible to cracking due to the stress and pressure exerted on them. Without adequate support, the edges of the pavement may experience movement, shifting, or deformation, leading to the formation of cracks. Therefore, the lack of side or shoulder support exacerbates the development and progression of edge cracks in pavements.Rate this question:
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- 35.
What type of crack in flexible pavement is caused by a lack of bond between the surface layer and the course beneath?
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Slippage
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Shrinkage
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Corner
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Longitudinal
Correct Answer
A. SlippageExplanation
Slippage cracks in flexible pavement are caused by a lack of bond between the surface layer and the course beneath. This lack of bond can occur due to factors such as poor quality materials, inadequate compaction, or excessive traffic loads. Slippage cracks typically occur parallel to the pavement's centerline and are characterized by a smooth and polished appearance. They can lead to further pavement deterioration if left untreated, making proper repair and maintenance crucial to ensure the longevity and safety of the pavement.Rate this question:
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- 36.
Where do corrugations in flexible pavement usually occur?
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On hills where vehicles accelerate on the upgrade
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At points where traffic brakes and accelerates
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At the entrance to parking areas
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Lack of side or shoulder support
Correct Answer
A. At points where traffic brakes and acceleratesExplanation
Corrugations in flexible pavement usually occur at points where traffic brakes and accelerates. This is because the repeated application of brakes and acceleration causes the pavement to experience varying levels of stress and strain, leading to the formation of corrugations. These corrugations can disrupt the smoothness of the road surface and create an uncomfortable driving experience for vehicles.Rate this question:
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- 37.
Which of the following is a cause of depressions in flexible pavements?
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Lack of aeration
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Too much fine aggregate
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Poor construction methods
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Round or smooth textured coarse aggregate
Correct Answer
A. Poor construction methodsExplanation
Poor construction methods can be a cause of depressions in flexible pavements. This could include improper compaction of the pavement layers, inadequate thickness of the layers, or incorrect placement of the materials. These construction deficiencies can result in weak spots or unevenness in the pavement, leading to depressions over time.Rate this question:
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- 38.
The progressive loss of surface material from flexible pavement by traffic abrasion is called...
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Bleeding
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Scaling
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Spalling
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Raveling
Correct Answer
A. RavelingExplanation
Raveling refers to the progressive loss of surface material from flexible pavement due to traffic abrasion. This can occur when the pavement becomes worn and the aggregate particles start to loosen and dislodge, resulting in a rough and uneven surface. Over time, raveling can lead to further deterioration of the pavement and the need for repairs or resurfacing.Rate this question:
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- 39.
What is the most common cause of a slippery flexible pavement?
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Bleeding
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Loose gravel
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Thin film of water
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Polished aggregates
Correct Answer
A. Thin film of waterExplanation
A slippery flexible pavement is most commonly caused by a thin film of water. When water accumulates on the surface of the pavement, it reduces the friction between the tires of vehicles and the road, making it slippery. This can be particularly dangerous during rainfall or when there are wet conditions. The presence of water on the pavement reduces the grip and traction, increasing the risk of accidents and loss of control for drivers. Therefore, it is important to be cautious and drive carefully when encountering a slippery flexible pavement with a thin film of water.Rate this question:
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- 40.
Bleeding in flexible pavement normally occurs in...
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Cold weather
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Hot weather
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Wet weather
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Dry weather
Correct Answer
A. Hot weatherExplanation
Bleeding in flexible pavement normally occurs in hot weather. This is because high temperatures cause the bitumen in the asphalt binder to soften and become more viscous. As a result, the bitumen can exude to the surface of the pavement, creating a shiny, black, and sticky film known as bleeding. This can reduce skid resistance, cause vehicles to track the bitumen onto other surfaces, and lead to rutting and deformation of the pavement. Hot weather conditions exacerbate the problem by increasing the likelihood of bitumen becoming fluid and flowing to the surface.Rate this question:
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- 41.
When should felexible pavements be inspected?
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Summer and winter
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Spring and fall
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Summer and fall
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Spring and winter
Correct Answer
A. Spring and fallExplanation
Flexible pavements should be inspected in spring and fall because these seasons represent significant changes in weather conditions. In spring, the pavement may have experienced damage from freezing and thawing during the winter, and it is important to assess any potential issues. In fall, the pavement may have endured heavy traffic and weather conditions during the summer, making it crucial to evaluate its condition before the winter season. Inspecting the pavement during these seasons allows for timely identification of any necessary repairs or maintenance to ensure its longevity and safety.Rate this question:
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- 42.
During an inspection of flexible pavements, you should try to determine...
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The cost of repairs
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Time needed for repairs
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Base course thickness
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The cause for the failure
Correct Answer
A. The cause for the failureExplanation
During an inspection of flexible pavements, it is important to determine the cause for the failure. This is because understanding the underlying reasons for the pavement's failure will help in developing an effective repair strategy. By identifying the cause, such as poor construction, inadequate drainage, or heavy traffic loads, appropriate measures can be taken to address the issue and prevent future failures. Determining the cause for the failure is therefore crucial in ensuring the longevity and functionality of the pavement.Rate this question:
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- 43.
Which of the following types of sealer can be used satisfactorily with most types of asphalt pavements?
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SS-S-1401
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SS-S-1614
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SS-S-00020
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SS-S-00095
Correct Answer
A. SS-S-1401Explanation
SS-S-1401 is the correct answer because it is a type of sealer that can be used satisfactorily with most types of asphalt pavements. The other options, SS-S-1614, SS-S-00020, and SS-S-00095, may not be as suitable for use with various types of asphalt pavements.Rate this question:
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- 44.
Small and medium cracks in flexible pavement can be sealed individually with a...
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Fog seal
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Sand seal
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Aggregate seal
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Prepared joint sealer
Correct Answer
A. Prepared joint sealerExplanation
A prepared joint sealer is the correct answer because it is specifically designed to seal small and medium cracks in flexible pavement. This type of sealer is made to fill and seal the cracks, preventing further damage and deterioration to the pavement. It provides a protective barrier that helps to extend the lifespan of the pavement and maintain its structural integrity.Rate this question:
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- 45.
Large cracks in pavement are repaird the same way as...
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Potholes
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Small cracks
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Medium cracks
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Surface treatment
Correct Answer
A. PotholesExplanation
Large cracks in pavement are repaired the same way as potholes because both require similar repair techniques and materials. Both potholes and large cracks result in structural damage to the pavement, and repairing them involves filling the gaps with a suitable material, such as asphalt or concrete. The repair process for both involves cleaning the area, preparing the surface, and then filling the gap with the appropriate material. By treating large cracks in the same way as potholes, the pavement can be restored and made safe for vehicles and pedestrians.Rate this question:
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- 46.
Large cracks in pavement are repaird the same way as...
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Potholes
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Medium cracks
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Small cracks
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Surface treatment
Correct Answer
A. PotholesExplanation
Large cracks in pavement are repaired the same way as potholes. Both potholes and large cracks require similar repair methods, such as filling the damaged area with asphalt or other suitable materials. The repair process involves cleaning the area, applying a patching material, and compacting it to create a smooth and durable surface. By treating large cracks in a similar manner as potholes, the integrity and safety of the pavement can be restored effectively.Rate this question:
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- 47.
What item is used to force sealing material intothe cracks in flexible pavement?
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Router
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Squeegee
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Pour Pot
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Hand broom
Correct Answer
A. SqueegeeExplanation
A squeegee is used to force sealing material into the cracks in flexible pavement. It is a tool with a rubber blade that is used to spread and push the sealing material into the cracks, ensuring a tight seal. The rubber blade of the squeegee helps to evenly distribute the sealing material and press it into the cracks, preventing any gaps or air pockets. This ensures that the cracks are properly sealed and helps to extend the lifespan of the pavement.Rate this question:
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- 48.
What item should you use to mark defective flexible pavement?
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Chalk
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Pencil
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Crayon
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Straightedge
Correct Answer
A. CrayonExplanation
A crayon is the best item to mark defective flexible pavement because it is made of wax and has a thick, opaque consistency that allows for clear and visible marking on the pavement surface. Chalk and pencil may not be as effective as they can easily get smudged or washed away, while a straightedge is used for measuring and not for marking. Therefore, a crayon is the most suitable choice for this task.Rate this question:
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- 49.
As you mark an area for removal of defective flexible pavement, how far into the good pavement should you make your marks?
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2 inches
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6 inches
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8 inches
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12 inches
Correct Answer
A. 12 inchesExplanation
When marking an area for removal of defective flexible pavement, it is recommended to make the marks 12 inches into the good pavement. This ensures that the damaged section is properly removed and replaced, allowing for a seamless and durable repair. By extending the marks 12 inches into the good pavement, any underlying issues or weaknesses can be identified and addressed, resulting in a more effective and long-lasting solution.Rate this question:
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Mar 21, 2023Quiz Edited by
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