Earthwork Construction Fundamentals And Terminology Practice Tests

Question 1

A soil sample has a liquid limit (LL) of 60 and a plastic limit (PL) of 25. Calculate the plasticity index (PI) of the soil. Express your answer as a numerical value.

Accepted Answer

35

Question 2

A soil sample weighs 120 grams in its natural state (bank). After excavation, its volume increases, and it weighs 100 grams. After compaction, its volume decreases, and it weighs 110 grams. Which of the following statements is correct regarding the soil's volume changes?

Accepted Answer

A. The soil experienced swell during excavation and shrinkage during compaction.

Answer

B. The soil experienced shrinkage during excavation and swell during compaction.

Answer

C. The soil experienced only swell.

Answer

D. The soil experienced only shrinkage.

Question 3

A contractor is excavating soil for a road construction project. The in-situ volume (bank) of the soil is 1000 cubic meters. The load factor for this soil is 1.25. What is the estimated loose volume of the excavated soil?

Accepted Answer

C. 1250 cubic meters

Answer

A. 800 cubic meters

Answer

B. 1000 cubic meters

Answer

D. 1500 cubic meters

Question 4

A soil is classified as coarse-grained if more than 50% of its particles by weight pass through the No. 200 sieve.

Accepted Answer

True

Answer

False

Question 5

A soil sample has a bank volume of 100 m³. After compaction, the volume reduces to 85 m³. Calculate the shrinkage factor. Express your answer to two decimal places.

Accepted Answer

0.85

Question 6

A hydraulic excavator with a 1.5 m³ bucket excavates soil with a density of 1800 kg/m³. Calculate the mass (in kg) of soil lifted per bucket load. Express your answer using MathJax notation.

Accepted Answer

2700

Question 7

A dozer with a blade width of 3.5 meters is used to clear a rectangular area of 50 meters by 80 meters. Assuming the dozer makes passes along the 50-meter side, how many passes are ideally required to clear the entire area, neglecting any overlap?

Accepted Answer

A. 23

Answer

B. 12

Answer

C. 140

Answer

D. 2800

Question 8

A scraper has a rated capacity of 15 loose cubic meters (LCM). If the soil swells by 25% when excavated, what is the volume of the soil in the bank cubic meters (BCM) that the scraper can effectively carry?

Accepted Answer

B. 12

Answer

A. 18.75

Answer

C. 11.25

Answer

D. 15

Question 9

A higher 'horsepower per foot of cutting edge' for a dozer blade indicates a reduced ability to penetrate hard soils.

Accepted Answer

True

Answer

False

Question 10

Which of the following attachments can be used with a hydraulic excavator?

Answer

A. Breaker/Hammer

Answer

B. Auger

Answer

C. Grapple

Answer

D. Compaction Wheel

Answer

E. Spreader Box

Question 11

A crane is lifting a load of 5000 kg at a radius of 15 meters. If the crane's tipping load at this radius is 6000 kg, what is the safety factor against tipping? Express your answer using MathJax notation.

Accepted Answer

1.2

Question 12

A vehicle has a total resistance of 50 lb/ton. If the vehicle weighs 20 tons, what is the total resistance force in pounds?

Accepted Answer

C. 1000

Answer

A. 2.5

Answer

B. 50

Answer

D. 100

Question 13

A soil sample has a wet weight of 20 N and a volume of $0.001 m^3$. After oven drying, the dry weight is 18 N. Calculate the dry density of the soil in $kg/m^3$.

Accepted Answer

1800

Question 14

A Proctor test is performed on a soil sample, and the following data is obtained: Maximum dry density = $1800 kg/m^3$, Optimum moisture content = 12%. If the specific gravity of soil solids is 2.7, calculate the degree of saturation at optimum moisture content. Use the formula: $S = \frac{w \cdot G_s}{\gamma_w} \cdot \gamma_d$ where $w$ is the optimum moisture content, $G_s$ is the specific gravity, $\gamma_w$ is the unit weight of water ($1000 kg/m^3$), and $\gamma_d$ is the dry density.

Accepted Answer

0.324

Answer

0.450

Answer

0.250

Answer

0.500

Question 15

A vibratory compactor is used to compact a soil layer. The area covered by the compactor in one pass is 2 meters wide and 10 meters long. If the compactor makes 5 passes and the compacted soil layer has a density of $1900 kg/m^3$ and a thickness of 0.3 meters, calculate the total mass of the compacted soil.

Accepted Answer

57000 kg

Answer

38000 kg

Answer

19000 kg

Answer

76000 kg

Question 16

Dynamic compaction is used to improve the soil at a site. A weight of 10 tons is dropped from a height of 15 meters. Calculate the potential energy delivered to the soil with each drop in Joules. (Use $g = 9.81 m/s^2$)

Accepted Answer

1471500

Question 17

Which of the following methods are used for stabilizing cohesive soils?

Answer

Surcharging

Answer

Dynamic Compaction

Answer

Sand Columns

Answer

Vibratory Compaction

Answer

Electroosmosis

Question 18

A granite sample weighs 2.65 g/cm³ and a volume of 150 cm³. Calculate the mass of the sample in grams, using the formula: $	ext{Mass} = 	ext{Density} 	imes 	ext{Volume}$.

Accepted Answer

397.5 grams

Question 19

A tunnel is being excavated using a hydraulic jumbo with 4 drills. Each drill operates at a rate of 1.5 meters per hour. If the tunnel face is 10 meters wide and 5 meters high, and the desired drilling pattern requires 1 hole per square meter, approximately how long will it take to drill all the required holes, assuming no downtime?

Accepted Answer

C. 8.33 hours

Answer

A. 6.25 hours

Answer

B. 7.5 hours

Answer

D. 10 hours

Question 20

A blasting operation requires fracturing 500 cubic meters of rock. If the powder factor for the rock is 0.3 kg/m³, what is the total amount of explosives needed in kilograms?

Accepted Answer

A. 150 kg

Answer

B. 166.7 kg

Answer

C. 500 kg

Answer

D. 1500 kg

Earthwork Construction Fundamentals And Terminology Practice Tests

Practice Tests

Earthwork Construction Fundamentals and Terminology

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