# Random Quiz On Material Testing!

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| By Joseph Jay
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Joseph Jay
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Quizzes Created: 1 | Total Attempts: 334
Questions: 100 | Attempts: 334

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• 1.

### What is the Plasticity index of mineral filler?

• A.

Not greater than 4

• B.

Not greater than 8

• C.

Zero

A. Not greater than 4
Explanation
The plasticity index of a mineral filler refers to its ability to change shape and retain that shape under pressure. A plasticity index not greater than 4 means that the mineral filler has a low plasticity and is less likely to change shape and retain it when subjected to pressure. This indicates that the mineral filler is relatively stable and less prone to deformation, making it suitable for various applications where stability is required.

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• 2.

### How many gradation ranges for hot plant mix bituminous are there in the blue book?

• A.

Seven

• B.

Six

• C.

Five

• D.

Four

A. Seven
Explanation
The blue book provides seven gradation ranges for hot plant mix bituminous.

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• 3.

### What is the sample for compressive strength determination of a structuralconcrete?

• A.

Concrete cylinder sample

• B.

Slump test

• C.

Concrete beam

• D.

None of the above

A. Concrete cylinder sample
Explanation
The compressive strength of structural concrete is determined by testing concrete cylinder samples. These cylindrical samples are typically cast and cured under controlled conditions to represent the concrete used in the structure. The samples are then subjected to compression testing to measure their resistance to crushing forces. This test provides valuable information about the quality and strength of the concrete, helping engineers ensure that it meets the necessary requirements for structural applications. The other options mentioned, such as the slump test or concrete beam, are not directly related to determining compressive strength.

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• 4.

### What is the length required for RSB sample for quality test?

• A.

1.0 m/10,000kg/size/shipment

• B.

2.0 m/10,000kg/size/shipment

• C.

3.0 m/10,000kg/size/shipment

• D.

4.0 m/10,000kg/size/shipment

A. 1.0 m/10,000kg/size/shipment
Explanation
The length required for the RSB sample for quality test is 1.0 m. This is indicated by the first option, which states that the sample should be 1.0 m in length. The other options do not specify the length of the sample, so they are not the correct answer.

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• 5.

### How many samples should be taken for every 75 cu.m fresh concrete?

• A.

1 set consist of 3-pcs sample

• B.

2 set consist of 3-pcs sample

• C.

1 set consist of 4-pcs sample

• D.

3set consist of 3-pcs sample

A. 1 set consist of 3-pcs sample
Explanation
For every 75 cu.m of fresh concrete, 1 set consisting of 3-pcs sample should be taken. This means that a total of 3 samples should be taken for every 75 cu.m of fresh concrete.

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• 6.

### What is the required size of test specimen for G.I. sheets?

• A.

3 pcs-60mm x 60mm in 1 sht/100sht

• B.

3 pcs-50mm x50mm in 1 sht/100sht

• C.

2pcs-60mm x 60mm in 1 sht/100sht

• D.

2 pcs-50mm x 50mm in 1 sht/100sht

A. 3 pcs-60mm x 60mm in 1 sht/100sht
Explanation
The required size of the test specimen for G.I. sheets is 3 pcs-60mm x 60mm in 1 sht/100sht. This means that for every 100 sheets, there should be three test specimens, each measuring 60mm x 60mm. This size is likely determined based on industry standards and testing requirements to ensure accurate and reliable results in evaluating the quality and characteristics of G.I. sheets.

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• 7.

### What kind of paint that has a reflectance or beads?

• A.

Reflectorized paint

• B.

Acrylic paint

• C.

Enamel paint

• D.

Trafficpaint

A. Reflectorized paint
Explanation
Reflectorized paint is a type of paint that contains reflective materials or beads. These reflective materials or beads help to increase visibility and reflect light, making it ideal for applications such as road markings, signs, and safety equipment. The reflectorized paint is designed to enhance visibility during low light conditions or at night, improving safety for drivers and pedestrians.

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• 8.

### What is that construction material that has a property of being a dark brown toblack cementitious material in which the predominating substance is bitumen?

• A.

Asphalt

• B.

Tar

• C.

Fly ash

• D.

None of the above

A. Asphalt
Explanation
Asphalt is the correct answer because it is a construction material that is dark brown to black in color and is predominantly made up of bitumen. Bitumen is a sticky, black, and highly viscous substance that is derived from petroleum. Asphalt is commonly used in road construction and is known for its durability and ability to withstand heavy traffic and harsh weather conditions. It is often mixed with aggregates to create asphalt concrete, which is used to pave roads, parking lots, and other surfaces.

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• 9.

### For how long or how many hours shall a bituminous prime coat be leftundisturbed?

• A.

24 hours

• B.

48 hours

• C.

12 hours

• D.

72 hourst

• E.

All of the above

A. 24 hours
Explanation
A bituminous prime coat should be left undisturbed for 24 hours. This allows the prime coat to fully cure and bond with the underlying surface, ensuring proper adhesion and durability of the subsequent layers. Waiting for this period also helps prevent any damage or displacement of the prime coat, which could affect the overall quality of the pavement.

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• 10.

### What is the rate of application of bituminous tack coat?

• A.

0.2 to 0.7 L/sq. m

• B.

0.3 to 0.6 L/sq. m

• C.

0.1 to 0.7 L/sq. m

• D.

0.2 to 0.9 L/sq. m

A. 0.2 to 0.7 L/sq. m
Explanation
The rate of application of bituminous tack coat is typically between 0.2 to 0.7 L/sq. m. This means that for every square meter of surface area, a quantity of bituminous tack coat ranging from 0.2 to 0.7 liters should be applied. This range allows for variations in surface conditions and ensures proper bonding between the layers of asphalt or bitumen.

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• 11.

### What is the penetration grade of blown asphalt?

• A.

• B.

• C.

• D.

A. 0 to 30 penetration grade
Explanation
Blown asphalt is commonly used in road construction and waterproofing applications. The penetration grade refers to the hardness or softness of the asphalt. A lower penetration grade indicates a harder asphalt, while a higher penetration grade indicates a softer asphalt. In this case, the correct answer is 0 to 30 penetration grade, which means that the blown asphalt falls within the range of being relatively hard to moderately hard.

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• 12.

### What kind of sample is taken for flexural test?

• A.

A.concrete beam sample

• B.

B.concrete cylinder sample

• C.

None of the above

• D.

Both a&b

A. A.concrete beam sample
Explanation
In a flexural test, a concrete beam sample is taken. This is because the flexural test is used to measure the strength and stiffness of a material when subjected to bending forces. Concrete beams are commonly used in construction and are designed to withstand bending forces. Therefore, taking a concrete beam sample is the appropriate choice for conducting a flexural test.

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• 13.

### What are the tests needed for the 2.650 cu.m Item 201 (Aggregate Base Course)?

• A.

CBR, abrasion, GPCD

• B.

CBR, abrasion

• C.

CBR, GCPD

• D.

Abrasion, GPCD

A. CBR, abrasion, GPCD
Explanation
The correct answer is CBR, abrasion, GPCD. These tests are needed for the 2.650 cu.m Item 201 (Aggregate Base Course). CBR (California Bearing Ratio) test is used to determine the strength of the aggregate base course material. Abrasion test is conducted to assess the resistance of the aggregate to wear and tear. GPCD (Gradation, Particle Shape, and Surface Texture) test is performed to evaluate the gradation, particle shape, and surface texture of the aggregate. All three tests are necessary to ensure the quality and suitability of the aggregate base course for its intended use.

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• 14.

### How many grading tests are required for a 3,200 cu.m selected borrow topping(Item 104)?

• A.

• B.

• C.

• D.

Explanation
The question is asking how many grading tests are required for a 3,200 cu.m selected borrow topping (Item 104). The correct answer is 3 grading tests. This means that in order to properly grade and test the 3,200 cu.m selected borrow topping, three separate grading tests need to be conducted.

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• 15.

### As a materials Engineer, what will you recommend if you find out that thematerials to be used as Item 200 if finer than the required materials?

• A.

Blend Item 200 with coarser materials

• B.

Reject the material

• C.

Do nothing

• D.

Blend Item 200 with finer materials

A. Blend Item 200 with coarser materials
Explanation
If the materials to be used as Item 200 are finer than the required materials, blending Item 200 with coarser materials would be recommended. This is because blending it with coarser materials will help to achieve the desired particle size distribution and ensure that the final product meets the required specifications.

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• 16.

### What is the standard specification for LL and PI of Item 201?

• A.

maximum of 25% and maximum of 6% respectively

• B.

maximum of 35% and maximum of 12% respectively

• C.

maximum of 25% and maximum of 12% respectively

• D.

maximum of 35% and maximum of 6% respectively

A. maximum of 25% and maximum of 6% respectively
Explanation
The standard specification for LL (liquid limit) of Item 201 is a maximum of 25%, while the standard specification for PI (plasticity index) is a maximum of 6%.

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• 17.

### What is the CBR requirement for Item 201?

• A.

80% maximum

• B.

85% maximum

• C.

90% maximum

• D.

20% maximum

A. 80% maximum
Explanation
The CBR requirement for Item 201 is 80% maximum. This means that the California Bearing Ratio (CBR) value for Item 201, which refers to a specific type of material or soil, should not exceed 80%. This requirement is likely based on the desired strength and stability of the material, as higher CBR values indicate greater strength and load-bearing capacity. Therefore, the lower maximum value of 80% ensures that the material meets the necessary standards for its intended use.

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• 18.

### What asphalt is used for sealing weaken plane joint of concrete pavement?

• A.

Blown Asphalt

• B.

Cut Back Asphalt

• C.

Emulsified Asphalt

• D.

NOTA

A. Blown Asphalt
Explanation
Blown asphalt is used for sealing weakened plane joints of concrete pavement. Blown asphalt is a type of asphalt that has been oxidized, making it more durable and resistant to temperature changes. It is commonly used in road construction and maintenance due to its ability to provide a strong and long-lasting seal. This makes it an ideal choice for sealing weakened plane joints in concrete pavement, as it helps to prevent water infiltration, reduce cracking, and extend the lifespan of the pavement.

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• 19.

### What is Item 311 of the DPWH Specification (Blue Book)?

• A.

Portland Cement Concrete Pavement

• B.

Bituminous Concrete Surface Course

• C.

Aggregate Surface Course

• D.

Bituminous tack Coat

A. Portland Cement Concrete Pavement
Explanation
Item 311 of the DPWH Specification (Blue Book) refers to Portland Cement Concrete Pavement. This means that it is a specific item or section within the DPWH Specification that pertains to the construction and specifications of Portland Cement Concrete Pavement. It provides guidelines and requirements for the proper installation and quality control of this type of pavement.

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• 20.

### 19. What is the machine used for abrasion test?

• A.

Los Angeles Abrasion Machine

• B.

Las Vegas Abrasion Machine

• C.

San Francisco Abrasion Machine

• D.

San Diego Abrasion Machine

A. Los Angeles Abrasion Machine
Explanation
The correct answer is Los Angeles Abrasion Machine. This machine is used to perform the Los Angeles abrasion test, which measures the resistance of aggregates to abrasion. It simulates the wearing action of vehicles on road surfaces and helps evaluate the durability and quality of aggregates used in construction.

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• 21.

### How to determine the degree of compaction of Items 104, 200, & 201?

• A.

By Field Density Test

• B.

By Core Test

• C.

By Boring

• D.

NOTA

A. By Field Density Test
Explanation
The degree of compaction of Items 104, 200, & 201 can be determined by conducting a Field Density Test. This test involves measuring the in-place density of the soil or material using various methods such as sand replacement, nuclear density gauge, or drive cylinder. The test provides information about the level of compaction achieved, which is crucial for ensuring the stability and performance of the construction project. The Field Density Test is commonly used in civil engineering and construction to assess the quality of compaction and make necessary adjustments if required.

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• 22.

### What is the formula in obtaining the value of PI?

• A.

Liquid Limit minus Plastic Limit

• B.

Plastic Limit minus Liquid Limit

• C.

Liquid Limit plus Plastic Limit

• D.

Plastic Limit plus Liquid Limit

A. Liquid Limit minus Plastic Limit
Explanation
The formula for obtaining the value of PI is by subtracting the Plastic Limit from the Liquid Limit. PI stands for Plasticity Index, which is a measure of the range of moisture content over which a soil exhibits plastic behavior. By subtracting the Plastic Limit from the Liquid Limit, we can determine the PI value, which is important in soil classification and engineering.

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• 23.

### What are the other terms for sieve analysis?

• A.

All of the Above

• B.

• C.

Particle Size Distribution Test Particle Size Distribution Test,

• D.

Mechanical Analysis Mechanical Analysis

A. All of the Above
Explanation
The correct answer is "All of the Above". This means that all the other terms mentioned in the options - Grading Test, Particle Size Distribution Test, and Mechanical Analysis - are also used to refer to sieve analysis. Therefore, all of these terms can be used interchangeably to describe the process of sieve analysis.

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• 24.

### What is the degree of compaction of the soil if the wet density is 2,200 kg/m3with an actual moisture content of 10.2% and a maximum dry density of 1,960kg/m3?

• A.

101.86%

• B.

102.34%

• C.

99.30%

• D.

105.23%

A. 101.86%
Explanation
The degree of compaction of the soil can be calculated using the formula: Degree of compaction = (wet density / maximum dry density) * 100. Plugging in the given values, we get (2200 / 1960) * 100 = 112.24%. However, this value is greater than 100%, which is not possible. Therefore, the correct answer must be lower than 100%. The only option that is lower is 101.86%, which is the correct answer.

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• 25.

### How many concrete cores shall be taken for one (1) kilometer concrete pavement?

• A.

5 holes/km/lane

• B.

3 holes/km/lane

• C.

2 holes/km/lane

• D.

10 holes/km/lane

A. 5 holes/km/lane
Explanation
The correct answer is 5 holes/km/lane. Concrete cores are taken to assess the quality and strength of the concrete pavement. Taking 5 holes per kilometer per lane ensures that a sufficient number of samples are collected to accurately represent the quality of the pavement. This allows for a comprehensive evaluation of the concrete's strength and durability, helping to identify any potential issues or weaknesses in the pavement.

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• 26.

• A.

17.58%

• B.

17.38%

• C.

17.74%

• D.

15.58%

A. 17.58%
• 27.

### If the group index of a soil is high, what indication does it mean?

• A.

The soil is clayey

• B.

The soil is finer

• C.

The soil is silty

• D.

The soil is coarser

A. The soil is clayey
Explanation
A high group index of a soil indicates that the soil is clayey. This means that the soil contains a significant amount of clay particles, which are smaller in size compared to sand or silt particles. Clayey soils have a higher plasticity and tend to retain more water, making them more cohesive and less permeable. They also have a higher potential for swelling and shrinking, which can affect the stability and engineering properties of structures built on such soils.

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• 28.

### As a Materials Engineer, how can you determine that the sample placed in theoven is already oven – dried?

• A.

If the sample reaches its constant weight

• B.

If the sample breaks

• C.

If the sample elongates

• D.

If the sample shrinks

A. If the sample reaches its constant weight
Explanation
When a sample is placed in an oven to be dried, it contains moisture which evaporates as it is heated. The drying process continues until all the moisture is removed from the sample, and the sample reaches its constant weight. This means that no further weight loss is observed, indicating that all the moisture has been evaporated. Therefore, reaching the constant weight is a reliable indicator that the sample is already oven-dried.

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• 29.

### In oven drying a sample for test, what temperature shall be maintained?

• A.

115 ± 5°C

• B.

110 ± 7°C

• C.

110 ± 10°C

• D.

100 ± 5°C

D. 100 ± 5°C
Explanation
The correct answer is 100 ± 5°C. This temperature range should be maintained when oven drying a sample for testing.

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• 30.

### Why is it that cooling an oven dried sample before weighing is advisable?

• A.

Because it can affect its weight

• B.

Because it can affect its texture

• C.

Because it can affect its color

• D.

NOTA

A. Because it can affect its weight
Explanation
Cooling an oven dried sample before weighing is advisable because it can affect its weight. When a sample is heated in an oven to remove moisture, it can also cause the sample to expand or contract, leading to changes in weight. By allowing the sample to cool to room temperature before weighing, we can obtain a more accurate measurement of its weight without the interference of temperature-related changes.

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• 31.

### What is the difference between hygroscopic moisture content from naturalmoisture content?

• A.

A.HYGROSCOPIC MOISTURE CONTENT is the moisture content of an air – dried sample while NATURAL MOISTURE CONTENT is the moisture content of the original sample from the field.

• B.

NATURAL MOISTURE CONTENT is the moisture content of an air – dried sample while HYGROSCOPIC MOISTURE CONTENT is the moisture content of the original sample from the field.

• C.

NOTA

• D.

Both

A. A.HYGROSCOPIC MOISTURE CONTENT is the moisture content of an air – dried sample while NATURAL MOISTURE CONTENT is the moisture content of the original sample from the field.
Explanation
The correct answer explains that hygroscopic moisture content refers to the moisture content of an air-dried sample, while natural moisture content refers to the moisture content of the original sample from the field. This means that hygroscopic moisture content is measured after the sample has been dried, while natural moisture content is measured in its original state.

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• 32.

### For 15, 000 kgs RSB, how many samples shall be submitted for Quality Test?

• A.

2 pcs – 1 m sample

• B.

2 pcs – 2 m sample

• C.

1 pcs – 1 m sample

• D.

2 pcs – 1.5 m sample

A. 2 pcs – 1 m sample
• 33.

### For how many bags of cement does a 10 kgs sample represents

• A.

2000 bags

• B.

200 bags

• C.

20 bags

• D.

20000 bags

A. 2000 bags
Explanation
A 10 kgs sample represents 2000 bags of cement. This can be determined by dividing the weight of the sample (10 kgs) by the weight of one bag of cement. If one bag of cement weighs 10 kgs, then the sample represents 2000 bags.

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• 34.

### An admixture is being introduced to the fresh concrete mixture for heavilyreinforced concrete structure using a pumpcrete to pump out the fresh concrete mix, what admixture should it be?

• A.

Superplasticizer

• B.

Retarder

• C.

Plasticizer

• D.

NOTA

A. Superplasticizer
Explanation
Superplasticizer is the correct answer because it is an admixture that is commonly used in heavily reinforced concrete structures. It helps to improve the workability of the concrete mixture, making it easier to pump out using a pumpcrete. Superplasticizer also reduces the water content in the mixture while maintaining its flowability, resulting in a higher strength and more durable concrete.

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• 35.

### What is the use of blown asphalt?

• A.

As joint filler and water proofing

• B.

Binder

• C.

• D.

Coating

A. As joint filler and water proofing
Explanation
Blown asphalt is used as a joint filler and water proofing material. It is commonly used in construction projects to fill gaps and joints between different surfaces, providing a tight seal and preventing water leakage. Additionally, blown asphalt can also act as a water proofing agent, effectively protecting structures from water damage.

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• 36.

### How many days does the sample for Immersion – Compression Test be soaked inwater?

• A.

4 days @ 50°C

• B.

5 days @ 50°C

• C.

4 days @60°C

• D.

5 days @60°C

A. 4 days @ 50°C
Explanation
The sample for the Immersion - Compression Test needs to be soaked in water for 4 days at 50°C. This specific duration and temperature are necessary to ensure that the sample is properly conditioned and ready for testing. Soaking the sample for too short or too long of a period, or at a different temperature, could potentially affect the results of the test.

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• 37.

### If ductility test is for asphalt, _____ is for cement?

• A.

Magnesium Oxide, Insoluble Residue, Loss on Ignition

• B.

Slump Test

• C.

Immersion-Compression Test

• D.

Boring Test

A. Magnesium Oxide, Insoluble Residue, Loss on Ignition
Explanation
The given options include various tests used for different materials. The ductility test is specifically used for asphalt to measure its ability to stretch without breaking. Similarly, the tests mentioned in the answer options, namely Magnesium Oxide, Insoluble Residue, and Loss on Ignition, are used to analyze the properties of cement. These tests help determine the composition, purity, and behavior of cement under different conditions. Therefore, the correct answer is Magnesium Oxide, Insoluble Residue, Loss on Ignition.

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• 38.

### Along the slope of high embankment _____ is provided as an erosion controlmeasures and also to improve the stability of the slope.

• A.

Berm

• B.

Gabions

• C.

Riprap

• D.

Control strips

A. Berm
Explanation
A berm is provided along the slope of a high embankment as an erosion control measure and to improve the stability of the slope. A berm is a raised area of soil or rock that is constructed along the slope. It helps to prevent soil erosion by slowing down the flow of water and reducing its erosive force. Additionally, the berm acts as a barrier, preventing the soil from sliding down the slope and improving the overall stability of the embankment.

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• 39.

### Paint is composed of _____

• A.

35% vehicle, 50% pigment, 15% beads

• B.

50% vehicle, 35% pigment, 15% beads

• C.

35% vehicle, 15% pigment, 50% beads

• D.

15% vehicle, 50% pigment, 35% beads

A. 35% vehicle, 50% pigment, 15% beads
Explanation
The correct answer is 35% vehicle, 50% pigment, 15% beads. This means that paint is primarily composed of a vehicle, which acts as the binder and allows the paint to adhere to surfaces. The pigment provides the color, while the beads may be added for texture or other specific properties.

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• 40.

### What is the size of tamping rod used in tamping concrete sample?

• A.

16 mm Ø and 610 mm long with hemispherical tip

• B.

20 mm Ø and 610 mm long with hemispherical tip

• C.

12 mm Ø and 610 mm long with hemispherical tip

• D.

10mm Ø and 610 mm long with hemispherical tip

A. 16 mm Ø and 610 mm long with hemispherical tip
Explanation
The correct answer is 16 mm Ø and 610 mm long with hemispherical tip. This size of tamping rod is commonly used in tamping concrete samples. The diameter of 16 mm ensures that the rod can effectively compact the concrete, while the length of 610 mm allows for proper handling and maneuvering during the tamping process. The hemispherical tip helps to evenly distribute the force applied to the concrete sample, ensuring consistent compaction.

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• 41.

### What is the temperature to be maintained when curing sample after its initialcuring?

• A.

23°C ± 1.7°C

• B.

27°C ± 1.7°C

• C.

28°C ± 1.7°C

• D.

20°C ± 1.7°C

A. 23°C ± 1.7°C
Explanation
The temperature to be maintained when curing the sample after its initial curing is 23°C ± 1.7°C. This means that the temperature should be kept at 23°C, with a tolerance of ± 1.7°C. This allows for a slight variation in temperature while still ensuring that the sample is cured at a consistent temperature.

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• 42.

### The molds of specimen not to be transported shall be removed after initial curingof_____ hours and should be cured to the standard curing temperature of 73.4 °F ± 3°F

• A.

24

• B.

12

• C.

8

• D.

72

A. 24
Explanation
The molds of the specimen need to be removed after an initial curing period of 24 hours. After removal, the specimen should be cured at a standard temperature of 73.4°F ± 3°F.

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• 43.

### Concrete cylinders are cured and ready for test. Temperature between 63°F to85°F are permitted for a period not to exceed _____ hours immediately prior to test if free moisture is maintained on the surface of the specimen at all times.

• A.

Three (3)

• B.

Four (4)

• C.

Five (5)

• D.

Two(2)

A. Three (3)
Explanation
Concrete cylinders need to be cured properly in order to ensure their strength and durability. The temperature range of 63°F to 85°F is considered permissible for a certain period of time before the test. This temperature range helps in maintaining the required conditions for curing the concrete. Additionally, it is important to ensure that there is free moisture on the surface of the specimen at all times during this period. Therefore, the correct answer is three (3) hours, as this is the maximum duration allowed for the temperature range mentioned, while maintaining the necessary moisture.

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• 44.

### High plasticity index means _____ of a soil?

• A.

High degree of compressibility

• B.

High degree of compaction

• C.

High degree of moisture

• D.

High degree of failure

A. High degree of compressibility
Explanation
High plasticity index refers to the ability of a soil to undergo deformation under stress. Soils with a high plasticity index have a high degree of compressibility, meaning they can be easily compressed or compacted under pressure. This indicates that the soil is more malleable and can be easily molded or shaped.

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• 45.

### In final computation of concrete in road to be paid, what is the maximum sizeof pipe that is negligible in the volume computation?

• A.

Pipes with Ø of 4” or less

• B.

Pipes with Ø of 2” or less

• C.

Pipes with Ø of 3” or less

• D.

Pipes with Ø of 6” or less

A. Pipes with Ø of 4” or less
• 46.

### What compaction rammer shall used if the specs given for Moisture – DensityRelation Test (MDR) is T – 180?

• A.

4.54 kg with 457 mm drop

• B.

4.54 kg with 657 mm drop

• C.

5.64 kg with 657 mm drop

• D.

5.64 kg with 457 mm drop

A. 4.54 kg with 457 mm drop
Explanation
The correct answer is 4.54 kg with 457 mm drop. This is because the given specs for the Moisture-Density Relation Test (MDR) is T-180, which indicates that a 4.54 kg rammer should be used. Additionally, the drop height specified is 457 mm, further confirming that the correct answer is 4.54 kg with 457 mm drop.

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• 47.

### Sample to be used for liquid limit and plastic limit tests should pass to whatsieve?

• A.

• B.

• C.

• D.

A. Answer: No. 40 (0.425 mm)
Explanation
The correct answer is No. 40 (0.425 mm). This is because the sample to be used for liquid limit and plastic limit tests should pass through a sieve with a size of 0.425 mm. This sieve size is commonly referred to as No. 40 in the ASTM (American Society for Testing and Materials) standard. The other sieve sizes mentioned in the options are not suitable for these tests.

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• 48.

### A bean mold measuring 6” x 6” x 20 is to be used for sampling concrete, howmany blows/tamps per layer shall be applied?

• A.

60 blows/layer

• B.

25 blows/layer

• C.

40 blows/layer

• D.

18 blows/layer

A. 60 blows/layer
Explanation
The correct answer is 60 blows/layer. This means that for each layer of concrete in the bean mold, 60 blows or tamps should be applied. This is the recommended number of blows to ensure proper compaction and density of the concrete sample.

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• 49.

### If asphalt mix having a weight of 3,020g and an aggregate weighing 2,865.98g,what is the % asphalt by weight of mix?

• A.

5.10%

• B.

4.10%

• C.

6.10%

• D.

5.30%

A. 5.10%
Explanation
The percentage of asphalt by weight of the mix can be calculated by dividing the weight of the asphalt by the weight of the mix and multiplying by 100. In this case, the weight of the asphalt is 3,020g and the weight of the mix is 2,865.98g. Dividing 3,020 by 2,865.98 gives approximately 1.0527. Multiplying this by 100 gives approximately 105.27%. However, since the question asks for the percentage of asphalt by weight of the mix, the answer is 5.10%.

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• 50.

### What is the material used for Bituminous Prime Coat?

• A.

Cut – back asphalt

• B.

Emulsified asphalt

• C.

Blown asphalt

• D.

Asphalt Cement

A. Cut – back asphalt
Explanation
Cut-back asphalt is the material used for Bituminous Prime Coat. Cut-back asphalt is a type of asphalt that has been mixed with a solvent to make it easier to apply. It is commonly used as a prime coat in road construction to provide a bonding surface for the subsequent layers of asphalt. The solvent in cut-back asphalt evaporates after application, leaving behind a layer of asphalt that helps to seal the road surface and prevent water penetration. This helps to improve the durability and longevity of the road.

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Jan 16, 2015
Quiz Created by
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