CDC 3e251 Set-a Vol. 2
This quiz will cover all URE multiple choice questions from Vol. 2 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 answers from the CERTest
Questions and Answers
- 1.
Storm drains should NOT be used EXCEPT where the slope of the ground is not suited for ditches, gutters, flumes; and where...
- A.
Natural drainage can be used
- B.
Space is restricted
- C.
Safety is not a factor
- D.
Traffic is light
Correct Answer
B. Space is restrictedExplanation
The correct answer is "space is restricted". This means that storm drains should only be used when there is limited space available for other drainage options such as ditches, gutters, or flumes. In situations where there is not enough space for these alternatives, storm drains can be used as a more compact and efficient solution.Rate this question:
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- 2.
Which of these conditions is a function of subsurface drainage?
- A.
To lower the water table
- B.
To drain underground lakes
- C.
To intercept seepage or underground springs
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
Subsurface drainage is a method used to manage water levels in the ground. Lowering the water table is one of the functions of subsurface drainage as it helps to prevent waterlogging and increase soil productivity. Draining underground lakes is another function, as it helps to remove excess water and prevent flooding. Intercepting seepage or underground springs is also a function of subsurface drainage, as it helps to redirect water away from structures or areas where it may cause damage. Therefore, all of the given conditions are functions of subsurface drainage.Rate this question:
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- 3.
The method to lay out an area for drainage structures primarily depends on...
- A.
Location
- B.
Distance to be covered
- C.
Amount of rainfall to be expected
- D.
Type of building equipment used
Correct Answer
C. Amount of rainfall to be expectedExplanation
The method to lay out an area for drainage structures primarily depends on the amount of rainfall to be expected. This is because the level of rainfall will determine the capacity and design of the drainage system needed to effectively manage the water flow and prevent flooding. The amount of rainfall also affects the size and placement of drainage structures such as gutters, downspouts, and drain pipes to ensure proper water drainage and prevent water damage to the surrounding area.Rate this question:
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- 4.
If you are installing culverts or storm drains, the bottom of the trench should be...
- A.
Shaped to fit the pipe
- B.
Shaped the same as the sides
- C.
Filled with select filter material
- D.
Filled with a layer of impervious soil
Correct Answer
D. Filled with a layer of impervious soilExplanation
When installing culverts or storm drains, it is important to fill the bottom of the trench with a layer of impervious soil. This is necessary to prevent water from seeping into the surrounding soil and causing erosion or damage to the structure. The impervious soil acts as a barrier, ensuring that water flows through the culvert or drain and does not leak out into the surrounding area. By filling the trench with impervious soil, the integrity and effectiveness of the culvert or drain system is maintained.Rate this question:
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- 5.
Notches are left in the center of check dams to...
- A.
Prevent washouts
- B.
Retard the water flow
- C.
Prevent silt settlement
- D.
Allow for normal flow of water
Correct Answer
D. Allow for normal flow of waterExplanation
The notches left in the center of check dams allow for normal flow of water. Check dams are structures built across streams or rivers to control and manage the flow of water. By creating notches in the center of the dam, water can pass through the dam while still maintaining a certain level of control. This allows for the regulation of water flow without causing excessive erosion or damage to the surrounding area.Rate this question:
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- 6.
How can you eliminate silting inside a culvert when the grade must be flatter than the inlet ditch grade?
- A.
Use a spillway at the outlet
- B.
Use a sump at the inlet
- C.
Build a headwall
- D.
Flare the end walls
Correct Answer
B. Use a sump at the inletExplanation
A sump at the inlet can help eliminate silting inside a culvert when the grade must be flatter than the inlet ditch grade. A sump is a depression or pit that collects sediment and debris, preventing them from entering the culvert. By trapping sediment in the sump, it prevents it from flowing into the culvert and causing silting. This solution allows for a flatter grade in the culvert while still maintaining proper drainage and preventing blockage.Rate this question:
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- 7.
What can you do if you want to funnel water into the inlet of a culvert?
- A.
Build a headwall
- B.
Install a drop inlet
- C.
Flare the endwalls
- D.
Build a spillway
Correct Answer
C. Flare the endwallsExplanation
To funnel water into the inlet of a culvert, you can flare the endwalls. Flaring the endwalls involves widening the opening of the culvert at its entrance, allowing for a smoother flow of water into the culvert. This helps to prevent any blockages or obstructions that could occur if the water is forced into a narrow opening. Flaring the endwalls is a common technique used to improve the efficiency and effectiveness of culverts in managing water flow.Rate this question:
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- 8.
Intercepting subsurface drainage is required when...
- A.
Space is limited
- B.
The water table is low
- C.
Groundwater is within 1 foot of the pavement
- D.
Groundwater is within 1 foot of the basecourse
Correct Answer
D. Groundwater is within 1 foot of the basecourseExplanation
Intercepting subsurface drainage is required when groundwater is within 1 foot of the basecourse. This is because when the groundwater level is too close to the basecourse, it can cause damage to the pavement and compromise its stability. Intercepting subsurface drainage helps to collect and redirect the excess groundwater away from the basecourse, preventing any potential damage and maintaining the integrity of the pavement structure.Rate this question:
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- 9.
What type of structure is constructed by filling a ditch or trench with crushed or broken rock?
- A.
Storm drain
- B.
French drain
- C.
Vertical dry well
- D.
Intercepting drain
Correct Answer
B. French drainExplanation
A French drain is a type of structure that is constructed by filling a ditch or trench with crushed or broken rock. The purpose of a French drain is to redirect water away from an area, preventing waterlogging and potential damage. The crushed or broken rock allows water to flow through easily while filtering out debris. This type of drain is commonly used to alleviate drainage issues in yards, gardens, and basements.Rate this question:
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- 10.
French drains are NOT reccommended for permanent constuction because they have...
- A.
Inadequate slop
- B.
A tendency to silt up
- C.
A tendemcy to overflow
- D.
The ability to carry only a low amount of water
Correct Answer
B. A tendency to silt upExplanation
French drains are not recommended for permanent construction due to their tendency to silt up. This means that over time, the drains can become clogged with sediment, reducing their effectiveness in draining water. As a result, the drains may not be able to effectively remove water from the surrounding area, leading to potential flooding or water damage. Therefore, alternative drainage systems that are less prone to silt buildup are typically preferred for permanent construction projects.Rate this question:
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- 11.
You should treat the bottom of vertical dry wells with calcium chloride of hay to...
- A.
Raise the water table
- B.
Lower the water table
- C.
Assist in drainage
- D.
Prevent freezing
Correct Answer
D. Prevent freezingExplanation
Treating the bottom of vertical dry wells with calcium chloride or hay helps prevent freezing. Calcium chloride is commonly used as a de-icing agent because it lowers the freezing point of water, preventing the formation of ice. By applying calcium chloride or hay at the bottom of the wells, the water inside the wells is less likely to freeze during cold temperatures. This prevents the wells from being blocked or damaged by ice, ensuring proper drainage and functionality.Rate this question:
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- 12.
Holes in perforated pipe should be placed UP when...
- A.
The structure is to be placed along the side of pavement
- B.
The structure is to be placed under the pavement
- C.
Slope is not a factor
- D.
The grade is steep
Correct Answer
A. The structure is to be placed along the side of pavementExplanation
When the structure is to be placed along the side of the pavement, it is important to have the holes in the perforated pipe placed upwards. This is because placing the holes upwards allows the water to drain away from the structure and towards the side of the pavement, preventing any accumulation of water near the structure. This helps in maintaining the stability and integrity of the structure and prevents any potential damage that could be caused by water accumulation.Rate this question:
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- 13.
After you place either your impervious soil layer, or filter material for subsurface structure, make sure the BOTTOM of the trench is...
- A.
Shaped to fit the pipe
- B.
At the correct slope
- C.
In a V-shape
- D.
Rounded
Correct Answer
A. Shaped to fit the pipeExplanation
The bottom of the trench needs to be shaped to fit the pipe because this will ensure proper alignment and support for the pipe. If the bottom of the trench is not shaped to fit the pipe, it may result in misalignment or instability of the pipe, leading to potential leaks or damage. Shaping the bottom of the trench to fit the pipe allows for a secure and stable installation, ensuring the proper functioning of the subsurface structure.Rate this question:
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- 14.
What type of drainage inspection should you perform during or immediately after a rainstorm?
- A.
Riding
- B.
Walking
- C.
Operational
- D.
Maintenance
Correct Answer
C. OperationalExplanation
During or immediately after a rainstorm, it is important to perform an operational drainage inspection. This type of inspection focuses on assessing the functionality and performance of the drainage system. It involves checking if the drains are properly functioning, if there are any blockages or clogs, and if the water is being effectively directed away from the desired areas. This inspection helps identify any issues or potential problems in the drainage system that may have arisen due to the rainstorm, allowing for timely maintenance and repairs if needed.Rate this question:
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- 15.
Where a drain line in blocked because of pipe collapse, you should find the blockage by...
- A.
Flushing with high-pressure water
- B.
Probing with cleaning rods
- C.
Using a plumber's snake
- D.
Digging up the line
Correct Answer
B. Probing with cleaning rodsExplanation
Probing with cleaning rods is the correct answer because when a drain line is blocked due to pipe collapse, using high-pressure water flushing may not be effective as the collapsed pipe may not allow the water to pass through. Using a plumber's snake may also not be effective as it may get stuck or cause further damage to the collapsed pipe. Digging up the line should be the last resort as it is time-consuming and costly. Probing with cleaning rods allows for a more targeted approach to locate and clear the blockage without causing additional damage to the pipe.Rate this question:
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- 16.
What can you do to prevent erosion in front of a check dam?
- A.
Heighten the dam
- B.
Build a spillway
- C.
Expand the sidewalls
- D.
Build additional dams
Correct Answer
C. Expand the sidewallsExplanation
Expanding the sidewalls of a check dam can help prevent erosion in front of it. By increasing the width of the sidewalls, the dam can better contain the flow of water and prevent it from eroding the area in front of the dam. This expansion provides a wider barrier for the water to flow through, reducing its erosive force and protecting the surrounding area from erosion.Rate this question:
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- 17.
To control erosion at the OUTLET end of a culvert you should...
- A.
Build a spillway with concrete
- B.
Flare the end walls
- C.
Install a plank headwall
- D.
Install a check dam
Correct Answer
A. Build a spillway with concreteExplanation
To control erosion at the outlet end of a culvert, building a spillway with concrete is the correct answer. A spillway is a structure designed to safely discharge excess water from a reservoir or channel, preventing erosion and damage to the culvert. By constructing a spillway with concrete, it provides a durable and stable structure that can effectively control the flow of water and prevent erosion at the outlet end of the culvert.Rate this question:
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- 18.
You should install a drop inlet at the end of a culvert to...
- A.
Increase water flow
- B.
Prevent erosion
- C.
Control silting
- D.
Act as a funnel
Correct Answer
C. Control siltingExplanation
A drop inlet installed at the end of a culvert helps to control silting. When water flows through the culvert, it may carry sediment and debris with it. By installing a drop inlet, the velocity of the water is reduced, allowing the sediment to settle out before exiting the culvert. This helps to prevent the build-up of sediment and silt, which can cause blockages and reduce the efficiency of the culvert. Therefore, a drop inlet is used to control silting and maintain the proper functioning of the culvert.Rate this question:
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- 19.
If a subsurface drain becomes clogged, it can be cleaned by...
- A.
Hauling off debris
- B.
Flushing with detergents
- C.
Flushing with high-pressure water
- D.
Blowing it out with high-pressure air
Correct Answer
C. Flushing with high-pressure waterExplanation
If a subsurface drain becomes clogged, it can be cleaned by flushing it with high-pressure water. This method is effective because the force of the water can dislodge and remove any debris or blockages that may be causing the clog. The high-pressure water can create enough force to push the debris through the drain and clear the pathway for proper drainage. This method is commonly used in drain cleaning as it is efficient and does not require the use of chemicals or manual labor to remove the clog.Rate this question:
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- 20.
Which soil horizon is the base for ALL types of pavement construction?
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
B. BExplanation
The correct answer is B. The B horizon, also known as the subsoil, is the base for all types of pavement construction. This layer is typically composed of compacted soil with good load-bearing capacity, which is essential for supporting the weight of pavement materials and vehicles. The B horizon is located below the topsoil (A horizon) and above the parent material (C horizon). It provides a stable foundation for the pavement and helps prevent settling or cracking.Rate this question:
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- 21.
Which soil classification is amde up of sand and gravel in the "B" horizon and has 50% or LESS material passing the No. 200 sieve?
- A.
Coarse-grained
- B.
Fine-grained
- C.
Organic
- D.
Plastic
Correct Answer
A. Coarse-grainedExplanation
Coarse-grained soil classification is made up of sand and gravel in the "B" horizon and has 50% or less material passing the No. 200 sieve. This means that the soil particles are larger in size and have less fine material. It is important to note that fine-grained soil would have more fine material and smaller particle sizes. Therefore, the correct answer is coarse-grained.Rate this question:
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- 22.
If you are laying out an area for conrete, how many inches on each side should you allow for the widht of the forms?
- A.
2
- B.
4
- C.
6
- D.
8
Correct Answer
C. 6Explanation
When laying out an area for concrete, it is important to allow for the width of the forms on each side. This is because the forms act as a barrier to hold the concrete in place while it is being poured and set. Allowing for a width of 6 inches on each side ensures that there is enough space for the forms to securely hold the concrete and prevent any leakage or shifting during the pouring process.Rate this question:
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- 23.
What is the only real difference between laying out a large area and a small area?
- A.
Terrain
- B.
Weather conditions
- C.
Equipment available
- D.
Amount of work
Correct Answer
D. Amount of workExplanation
The only real difference between laying out a large area and a small area is the amount of work involved. When working on a large area, there will be more materials, measurements, and overall effort required compared to a small area. The size of the area directly affects the amount of work needed to complete the task, while factors such as terrain, weather conditions, and equipment available may vary but do not necessarily differentiate between laying out a large or small area.Rate this question:
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- 24.
You should place the first centerline stake for concrete at the...
- A.
First curve
- B.
End of the curve
- C.
Beginning of the project
- D.
End of the project
Correct Answer
C. Beginning of the projectExplanation
The first centerline stake for concrete should be placed at the beginning of the project. This is because the centerline stake helps to establish the reference point for the project and ensures that the concrete is poured accurately along the desired path. Placing it at the beginning allows for proper alignment and measurement of subsequent stakes and ensures that the project starts off on the right track.Rate this question:
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- 25.
What symbol should be on a stake placed where a curve returns to a straightaway?
- A.
PC
- B.
PI
- C.
PT
- D.
C
Correct Answer
C. PTExplanation
A stake with the symbol "PT" should be placed where a curve returns to a straightaway. This symbol stands for "Point of Tangency," indicating the point where the curved path transitions back to a straight line. It helps to mark this point for reference and to ensure the smooth flow of traffic.Rate this question:
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- 26.
On a centerline stake, where is the amount of earthwork to be done marked?
- A.
Front
- B.
Back
- C.
Top
- D.
Side
Correct Answer
B. BackExplanation
The amount of earthwork to be done is marked on the back of a centerline stake. This means that the measurement or indication of the earthwork required is made on the side of the stake that is opposite to the front.Rate this question:
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- 27.
Work drawings usually begin by showing...
- A.
Foundations
- B.
Boundaries
- C.
Utility lines
- D.
Soil characteristics
Correct Answer
B. BoundariesExplanation
Work drawings usually begin by showing boundaries. This is because boundaries define the limits and extents of the project area. By showing the boundaries on the drawing, it allows the viewer to understand the exact area where the work will take place. This information is crucial for contractors, engineers, and other stakeholders involved in the project to have a clear understanding of the project's scope and to avoid any encroachment or confusion with neighboring properties. Additionally, showing boundaries helps in coordinating and planning the project effectively.Rate this question:
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- 28.
What basic symbol in work drawings requires the greatest understanding?
- A.
Elevation
- B.
Dimension
- C.
Utility
- D.
Lines
Correct Answer
D. LinesExplanation
Lines in work drawings require the greatest understanding because they convey important information about the shape, size, and position of objects. Different types of lines, such as solid lines, dashed lines, and dotted lines, are used to represent different elements in the drawing, such as outlines, hidden features, and construction details. Understanding how to interpret and use these lines correctly is essential for accurately interpreting and creating work drawings.Rate this question:
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- 29.
What line in a drawing outlines a specific item to be illustrated?
- A.
Center line
- B.
Object line
- C.
Section line
- D.
Detailed line
Correct Answer
B. Object lineExplanation
The object line in a drawing is used to outline a specific item that is to be illustrated. It is a continuous and thick line that defines the visible edges of an object, providing a clear representation of its shape and form. This line helps to distinguish the object from other elements in the drawing and allows the viewer to easily identify and understand the intended illustration.Rate this question:
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- 30.
What is meant by a line, composed of a series of short dashes, on a drawing?
- A.
It represents a center line
- B.
It represents a hidden line
- C.
It shows that everything inside the line is complete
- D.
It shows the kind of material that is to be used
Correct Answer
B. It represents a hidden lineExplanation
A line composed of a series of short dashes on a drawing represents a hidden line. Hidden lines are used in technical drawings to represent features that are not visible from a particular viewpoint. These features are typically obscured by other parts of the object or are located inside the object. The dashed line helps to differentiate hidden lines from other types of lines on the drawing, such as visible lines or center lines.Rate this question:
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- 31.
What is used by the engineer to convey ideas and thoughts?
- A.
Lines
- B.
Letters
- C.
Symbols
- D.
Abbreviations
Correct Answer
C. SymbolsExplanation
Symbols are used by engineers to convey ideas and thoughts. Symbols are visual representations that can represent complex concepts or objects in a simplified manner. They are commonly used in engineering drawings, diagrams, and schematics to communicate information quickly and effectively. Symbols can convey specific meanings and are universally understood within the engineering community, making them a valuable tool for expressing ideas and thoughts in a concise and standardized way.Rate this question:
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- 32.
What would be the first thing to get to prepare a working drawing?
- A.
Cost estimate
- B.
Required tools
- C.
Digging permit
- D.
Commander's approval
Correct Answer
B. Required toolsExplanation
The first thing to get to prepare a working drawing is the required tools. This is because without the necessary tools, it would be impossible to accurately and effectively create the drawing. The tools needed may vary depending on the specific project, but they could include items such as measuring tools, drafting equipment, and drawing software. Having the right tools ensures that the drawing can be completed with precision and efficiency.Rate this question:
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- 33.
When preparing a sketch for a sidewalk, which step should you perform first?
- A.
Draw and label pertinent items
- B.
Draw and label proposed sidewalk
- C.
Physically check the construction site
- D.
Measure distances and place figures on sketch
Correct Answer
C. Physically check the construction siteExplanation
Physically checking the construction site should be the first step when preparing a sketch for a sidewalk because it allows the person to assess the actual conditions and constraints of the site. This step helps in understanding the terrain, any existing structures, and potential obstacles that may affect the design and construction of the sidewalk. By physically inspecting the site, one can gather accurate information and make informed decisions regarding the placement and design of the sidewalk.Rate this question:
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- 34.
What should you add to your working sketch?
- A.
Your name
- B.
Cost estimate
- C.
Special instructions
- D.
Estimated time of completion
Correct Answer
C. Special instructionsExplanation
In a working sketch, it is important to include special instructions. These instructions provide specific details or requirements that need to be followed while working on the sketch. By including special instructions, it ensures that the person working on the sketch understands any specific guidelines or directions that need to be followed to complete the task accurately. This helps to avoid any confusion or mistakes during the process. Including special instructions in the working sketch improves communication and ensures that the desired outcome is achieved.Rate this question:
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- 35.
How are crosshairs brought into focus on the dumpy level?
- A.
By leveling the legs
- B.
By rotating the eyepiece
- C.
By turning the adjusting screw
- D.
By adjusting the azimuth clamp
Correct Answer
B. By rotating the eyepieceExplanation
The crosshairs on a dumpy level are brought into focus by rotating the eyepiece. This adjustment allows the user to achieve a clear and sharp image of the crosshairs, ensuring accurate measurements and readings. By rotating the eyepiece, the user can customize the focus to their individual vision, making it easier to align the crosshairs with the desired target or reference point.Rate this question:
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- 36.
What device on the self-leveling level is used to center the bubble on the bull eye?
- A.
The compensator
- B.
The azimuth clamp
- C.
The tangent screw
- D.
The leveling screw
Correct Answer
D. The leveling screwExplanation
The leveling screw is used to center the bubble on the bull eye of a self-leveling level. By adjusting the leveling screw, the user can ensure that the level is perfectly leveled and the bubble is centered. This allows for accurate measurements and leveling of surfaces. The compensator, azimuth clamp, and tangent screw are not specifically used for centering the bubble on the bull eye.Rate this question:
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- 37.
When you carry the engineer level between points on a survey you should...
- A.
Leave the instrument on the tripod
- B.
Dismantle the instrument from the tripod
- C.
Tighten the clamp screw to prevent movement
- D.
Loosen the clamp to let the instrument move in case it is hit
Correct Answer
A. Leave the instrument on the tripodExplanation
When you carry the engineer level between points on a survey, it is recommended to leave the instrument on the tripod. This is because the tripod provides stability and support to the level, ensuring that it remains in a fixed position and is not subject to any unnecessary movement or damage during transportation. Removing the instrument from the tripod can increase the risk of mishandling or dropping it, potentially causing damage to the level or affecting its accuracy. Therefore, leaving the instrument on the tripod is the safest and most practical option when moving between survey points.Rate this question:
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- 38.
Before embedding the third leg on the tripod, when would it be necessary to move the leg in or out?
- A.
To compensate for windy conditions
- B.
To keep all legs at a uniform angle
- C.
To find a more stable surface
- D.
To level the head slightly
Correct Answer
D. To level the head slightlyExplanation
To level the head slightly, it would be necessary to move the leg in or out before embedding the third leg on the tripod. This is because adjusting the length of one leg can help in achieving a balanced and leveled position for the tripod head. By doing so, the photographer can ensure that the camera is positioned correctly and avoid any tilting or unevenness in the final shot.Rate this question:
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- 39.
When you are setting up the tripod on steep surfaces, place the third leg...
- A.
Uphill
- B.
Downhill
- C.
To the left
- D.
To the right
Correct Answer
A. UphillExplanation
When setting up a tripod on steep surfaces, it is important to place the third leg uphill. This is because positioning the leg uphill provides stability and prevents the tripod from sliding or tipping over. Placing the leg downhill or to the left/right may cause the tripod to be unbalanced and increase the risk of it falling. Therefore, placing the third leg uphill ensures the tripod is securely positioned and minimizes the chances of any accidents or damage.Rate this question:
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- 40.
What person takes the rod reading when using a target?
- A.
Rodman
- B.
Levelman
- C.
Signalman
- D.
Engineer
Correct Answer
A. RodmanExplanation
The correct answer is Rodman. A Rodman is the person who takes the rod reading when using a target.Rate this question:
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- 41.
To determine the hieght of the instrument, you add the bench mark eleveation to what reading taken from the elveling rod?
- A.
Backsight
- B.
Sidesight
- C.
Foresight
- D.
Mean Sea Level
Correct Answer
A. BacksightExplanation
To determine the height of the instrument, you add the benchmark elevation to the backsight reading taken from the leveling rod. The backsight reading is the measurement taken from a point of known elevation (benchmark) to the instrument. Adding this reading to the benchmark elevation allows for the calculation of the instrument's height above the benchmark, which is necessary for accurate leveling measurements.Rate this question:
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- 42.
The laser level operates at what RPM?
- A.
200 RPM
- B.
400 RPM
- C.
600 RPM
- D.
800 PM
Correct Answer
C. 600 RPMExplanation
The laser level operates at 600 RPM. RPM stands for revolutions per minute, which measures the rotational speed of an object. In this case, the laser level rotates at a speed of 600 revolutions per minute.Rate this question:
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- 43.
How many satelites make up the GPS system?
- A.
12
- B.
26
- C.
18
- D.
24
Correct Answer
D. 24Explanation
The correct answer is 24. The GPS system consists of a constellation of 24 satellites that orbit the Earth. These satellites work together to provide accurate positioning, navigation, and timing information to GPS receivers on the ground. Each satellite continuously broadcasts signals that allow GPS receivers to determine their precise location. Having 24 satellites ensures that at least four satellites are always visible from any point on Earth, ensuring reliable and accurate GPS positioning.Rate this question:
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- 44.
GPS operates off of what type of signal?
- A.
Radio
- B.
Microwave
- C.
TV
- D.
Electric
Correct Answer
A. RadioExplanation
GPS operates off of a radio signal. Radio waves are used to transmit the signals from GPS satellites to GPS receivers on the ground. These signals contain information about the satellite's location and the time the signal was transmitted. The GPS receiver uses this information to calculate its own location. The radio signal is essential for the functioning of GPS as it allows for accurate positioning and navigation. Microwave, TV, and electric signals are not used in GPS operation.Rate this question:
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- 45.
What is the most common length carpenter's level used on small projects?
- A.
2 feet
- B.
3 feet
- C.
4 feet
- D.
6 feet
Correct Answer
C. 4 feetExplanation
The most common length carpenter's level used on small projects is 4 feet. This length is suitable for a wide range of tasks, providing enough length to accurately measure and level surfaces while still being manageable and easy to use in smaller spaces. It strikes a balance between being practical for small projects and providing enough length for versatility in different applications.Rate this question:
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- 46.
What type of cut is made to LOWER the grade of a road or runway?
- A.
Bench
- B.
Through
- C.
Sidehill
- D.
Combination
Correct Answer
B. Through -
- 47.
Which piece of equipment is NOT reccommended for excavating large areas?
- A.
Dozer
- B.
Scraper
- C.
Backhoe
- D.
Clamshell
Correct Answer
C. BackhoeExplanation
A backhoe is not recommended for excavating large areas because it is primarily designed for digging small trenches and holes. It has a limited reach and capacity compared to other equipment like a dozer, scraper, or clamshell. These other equipment options are better suited for large-scale excavation projects as they have larger capacities, longer reach, and can move more material efficiently.Rate this question:
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- 48.
No matter what method of excavation you use, you must completely remove all...
- A.
Parent material
- B.
A horizon soil
- C.
B horizon soil
- D.
C horizon soil
Correct Answer
B. A horizon soilExplanation
When excavating, it is important to completely remove the parent material, which refers to the original material from which the soil has developed. The parent material can vary and may include rocks, minerals, or organic matter. By removing the parent material, the excavation process ensures that only the desired soil is left behind. The A horizon soil, also known as topsoil, is the uppermost layer of soil that is rich in organic matter and nutrients, making it essential for plant growth. Therefore, it is not necessary to remove the A horizon soil during excavation.Rate this question:
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- 49.
One purpose of mechanical stabilization is to...
- A.
Increase the wheel loads
- B.
Decrease the wheel loads
- C.
Increase drainage
- D.
Decrease drainage
Correct Answer
C. Increase drainageExplanation
Mechanical stabilization refers to the process of improving the stability and strength of a structure or material. In the context of this question, mechanical stabilization aims to enhance drainage. By increasing drainage, excess water is efficiently removed from the area, preventing the accumulation of water and potential damage to the structure. This can be achieved through various methods such as adding drainage pipes, improving the slope of the terrain, or using permeable materials. Overall, the goal of mechanical stabilization in this scenario is to enhance the drainage system and ensure proper water flow.Rate this question:
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- 50.
Sands and gravel that contain silts and clay are BEST compacted with...
- A.
Vibratory rollers
- B.
Pneumatic-tire rollers
- C.
Sheepsfoot rollers
- D.
Steel wheel rollers
Correct Answer
B. Pneumatic-tire rollersExplanation
Sands and gravel that contain silts and clay are best compacted with pneumatic-tire rollers. Pneumatic-tire rollers have rubber tires that provide a uniform pressure on the soil surface, allowing for better compaction of the fine particles such as silts and clay. The tires also help to knead and mix the soil, improving its overall density and stability. This type of roller is particularly effective in compacting cohesive soils, ensuring a solid and stable base for construction projects.Rate this question:
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Feb 21, 2013Quiz Created by
Johnr21077
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