Test 11 - General Specifications for Earthwork

Question 1 ప్రశ్న 1

Before commencing excavation for a proposed pump-house, a contractor finds vegetation, construction debris, existing survey markers and an area of reusable topsoil. Which action best satisfies sound site-preparation specifications?

A Remove all vegetation, topsoil and survey markers together without recording their positions. B Clear the required work area, identify and protect survey controls, and separately preserve suitable topsoil where the approved plan requires reuse. C Begin mechanical excavation immediately and carry out site clearance after reaching the foundation level. D Mix topsoil and construction debris into the proposed structural backfill to reduce disposal requirements.

Question 2 ప్రశ్న 2

At a foundation location, the existing ground reduced level is 101.35 m and the approved excavation-bottom reduced level is 99.85 m. Assuming uniform ground level and vertical excavation, what excavation depth should be used for setting out?

A 0.85 m. B 1.35 m. C 1.50 m. D 2.15 m.

Question 3 ప్రశ్న 3

While setting out a water-supply trench, the engineer notices that the proposed alignment crosses an existing underground electrical cable shown approximately on an old utility plan. What is the most appropriate action before mechanical excavation?

A Verify the utility location with the responsible agency and suitable detection or controlled exposure, then establish approved protection and excavation procedures. B Assume the cable is exactly at the depth shown on the old plan and excavate mechanically without further checks. C Disconnect the cable without authorization so that excavation can proceed on schedule. D Increase trench width without locating the cable because wider excavation eliminates utility-strike risk.

Question 4 ప్రశ్న 4

A foundation trench passes through ordinary soil and a lower layer of rock requiring a different excavation method. The adopted contract contains separately described rates for the two material classifications. What is the correct specification and measurement treatment?

A Classify the entire excavation as ordinary soil because it occurs within a single trench. B Apply the rock rate to the whole excavation because the lowest layer is rock. C Measure only the total trench depth and omit the distinction between material classes. D Identify the actual material boundaries and record the quantities separately under the applicable excavation descriptions and rates.

Question 5 ప్రశ్న 5

During the rainy season, a contractor proposes to keep a deep temporary excavation nearly vertical in soft, saturated soil because the excavation will remain open for only two days. Which engineering judgement is most defensible?

A Short exposure guarantees stability, so no ground-support assessment is necessary. B Temporary slopes or support must be selected from the soil, groundwater, depth, surcharge and adjacent-structure conditions rather than duration alone. C All saturated excavations must use one identical slope angle regardless of the soil. D Excavation stability can be evaluated only after the permanent foundation concrete has hardened.

Question 6 ప్రశ్న 6

During excavation for an isolated footing, the contractor accidentally removes soil below the approved founding level. The underlying material has not been evaluated, and the extra excavation was not authorized. What is the most appropriate specification-based response?

A Place loose excavated soil into the overdeepened portion and immediately cast the footing. B Increase the specified footing load because the foundation is now located deeper. C Report the overexcavation, assess its effect on the founding stratum, and restore the required level using an approved engineered treatment. D Ignore the excess depth because any deeper excavation necessarily improves foundation performance.

Question 7 ప్రశ్న 7

An excavation rate expressly includes incidental pumping of rainwater accumulated in the trench. During execution, continuous groundwater inflow also requires an additional pumping system that is separately described and authorized under the contract. Which payment interpretation is appropriate?

A Avoid separate payment for the rainwater operation already included in the rate, while assessing the authorized groundwater-control work under its applicable separate provision. B Pay for all rainwater pumping twice because the quantity of groundwater has increased. C Treat all possible groundwater pumping as automatically included in the original excavation rate even when the contract provides a distinct authorized item. D Ignore the need to control groundwater until the foundation concrete is placed.

Question 8 ప్రశ్న 8

An approved rectangular trench is 20 m long, 1.20 m wide and 1.50 m deep. The contractor excavates it to a uniform width of 1.50 m without authorization, while maintaining the approved depth and length. What EXTRA in-situ excavation volume results solely from the unauthorized widening?

A 4.50 m3. B 6.00 m3. C 12.00 m3. D 9.00 m3.

Question 9 ప్రశ్న 9

At a deep water-main trench, excavated soil is stockpiled immediately beside an unsupported trench edge and heavy equipment operates adjacent to the same edge. What is the principal concern and appropriate corrective measure?

A The stockpile improves lateral soil resistance and should remain against the trench edge. B Spoil and equipment can impose surcharge loads that increase instability risk, so their locations and the excavation support must be controlled. C The only consequence is a change in the colour of the excavated material. D The additional load is irrelevant if the trench width matches the drawing.

Question 10 ప్రశ్న 10

A proposed pump-house foundation excavation is immediately adjacent to an existing building whose foundation level may be higher than the new excavation bottom. Which action is most appropriate?

A Excavate below the neighbouring foundation without investigation because the existing building is not part of the contract. B Use the excavated spoil as a surcharge against the existing wall to counteract settlement. C Investigate the adjacent foundation and soil conditions, and provide designed shoring, underpinning or other protective measures where necessary before undermining the support. D Assume groundwater removal alone will prevent all movement of the neighbouring structure.

Question 11 ప్రశ్న 11

A foundation trench is 24 m long and 1.00 m wide. The upper 0.75 m consists of ordinary soil and the lower 0.45 m consists of rock classified under a separate excavation item. Assuming vertical sides and no deductions, what are the respective excavation quantities?

A Ordinary soil 18.00 m3 and rock 10.80 m3. B Ordinary soil 28.80 m3 and rock 10.80 m3. C Ordinary soil 18.00 m3 and rock 28.80 m3. D Ordinary soil 10.80 m3 and rock 18.00 m3.

Question 12 ప్రశ్న 12

An earthwork contract includes initial disposal of excavated soil within a specified lead, while an approved disposal location lies beyond that lead. Which estimating and specification decision is correct?

A Pay the entire disposal operation again without checking what is included in the original excavation rate. B Assume the excavation rate covers unlimited transport distances because the soil is generated on the project site. C Dump the soil at the nearest available low-lying area without obtaining permission. D Check the included lead and lift provisions, measure any separately authorized additional carriage as specified, and use an approved disposal location.

Question 13 ప్రశ్న 13

Excavated soil intended for structural backfilling contains roots, organic debris and unsuitable material mixed with otherwise reusable soil. Which decision best follows earthwork workmanship requirements?

A Use the mixed soil without inspection because material from the same site is always suitable. B Separate or reject unsuitable material and use approved fill satisfying the relevant grading, cleanliness and compaction requirements. C Increase the water content substantially so that organic debris becomes harmless. D Place the unsuitable material directly beneath the footing to reduce consumption of selected fill.

Question 14 ప్రశ్న 14

A project earthwork specification limits each LOOSE fill lift to a maximum thickness of 200 mm before compaction. A contractor proposes placing a single 450 mm loose layer and making additional roller passes. What is the most appropriate response?

A Accept the proposal automatically because extra roller passes always compact the full layer depth. B Treat the stated limit as applicable only to excavation depth rather than filling. C Require placement in compliant thinner lifts unless an alternative thickness is specifically demonstrated and approved under the contract. D Permit the thick layer without testing if its upper surface appears level.

Question 15 ప్రశ్న 15

A compacted earth-fill operation is failing to reach the required dry density because the approved granular fill is considerably drier than its laboratory-determined optimum moisture content. Which corrective action should normally be investigated first?

A Add a controlled quantity of water, mix it uniformly, compact with suitable equipment and verify the resulting density. B Continue compaction indefinitely without adjusting moisture content. C Add organic matter to retain moisture within the filling. D Replace every roller pass with surface dressing alone.

Question 16 ప్రశ్న 16

A cohesive fill layer is significantly wetter than the approved moisture range and shows pumping and rutting under the roller. What is the most appropriate response?

A Continue rolling until the wet layer develops a smooth surface, irrespective of its density. B Immediately cover the pumping layer with another thick lift to conceal the deformation. C Use additional water to reduce friction within the already saturated soil. D Stop relying on roller passes alone, condition or replace the unsuitable wet material as approved, and verify compliance before placing subsequent layers.

Question 17 ప్రశ్న 17

A project requires compacted filling to achieve at least 95% of its laboratory maximum dry density. The laboratory maximum dry density is 1.95 Mg/m3, and the measured field dry density is 1.80 Mg/m3. What is the correct assessment?

A The layer passes because its field dry density exceeds 90% of the laboratory value. B The relative compaction is approximately 92.31%, so the layer fails the specified 95% requirement. C The layer passes because 1.80 Mg/m3 is greater than the required 1.50 Mg/m3. D The layer fails only if the measured moisture content is exactly the optimum moisture content.

Question 18 ప్రశ్న 18

A contractor argues that a compacted fill should be accepted solely because the roller has completed the number of passes mentioned in the construction method statement. The contract also requires a minimum field dry density. Which interpretation is correct?

A The number of passes replaces all density testing whenever a vibratory roller is used. B Visual smoothness of the filling overrides the specified density criterion. C Roller passes are a construction-process control, while compliance with the required field dry density must be established using the specified testing and acceptance procedure. D Laboratory compaction results are unnecessary because the soil is already in the field.

Question 19 ప్రశ్న 19

A water-main trench is being backfilled after pipe installation. The proposed method involves dropping large angular rock fragments against one side of the pipe and compacting only from the opposite side. Which alternative best satisfies appropriate workmanship requirements?

A Use approved bedding and surround material, place it carefully around and beneath the pipe haunches, and compact the sides in a controlled, balanced manner without damaging the pipeline. B Use the largest available stones against the pipe because they provide better support without compaction. C Compact material on one side only because equal lateral support is unnecessary. D Allow heavy equipment to strike the pipe directly to improve its seating.

Question 20 ప్రశ్న 20

The contractor proposes completely backfilling a newly laid water-supply pipeline before carrying out the specified joint inspection and pressure test. The approved construction sequence requires these checks before final covering. What should the supervising engineer require?

A Permit all final backfilling because testing is unnecessary once the pipe is hidden. B Increase the backfill density requirement in place of the pressure test. C Backfill immediately and declare the joints satisfactory from the trench surface appearance. D Complete the required inspections and tests, retain necessary access to the joints, and proceed with final backfilling only after the specified acceptance conditions are satisfied.

Question 21 ప్రశ్న 21

A foundation project produces 100 m3 of soil measured in situ, while a separate earthwork item requires 70 m3 of compacted filling. Soil suitability and the relationships between in-situ, loose and compacted volumes have not been established. Which conclusion is valid?

A Exactly 30 m3 of compacted soil will necessarily be available as surplus. B Exactly 70% of the excavated soil must be reusable irrespective of its properties. C The two measured quantities should be kept distinct, and a material balance requires suitability assessment and justified conversion factors before estimating surplus or borrow requirements. D The filling quantity should automatically be revised to 100 m3 because the material originates on site.

Question 22 ప్రశ్న 22

During trench excavation in loose soil, workers observe local sidewall sloughing and small cracks developing behind the trench edge. Which response best satisfies safe excavation and workmanship principles?

A Continue excavation at the same depth because minor cracking is unrelated to stability. B Stop unsafe entry, reassess excavation stability and provide suitable sloping, shoring or other approved protection before work resumes. C Place additional spoil immediately beside the cracked edge to restrain the soil. D Ignore the cracks if the trench bottom is at the approved reduced level.

Question 23 ప్రశ్న 23

After a foundation trench has reached the approved reduced level, its bottom contains loose disturbed material and local high spots. What does acceptable final dressing and preparation normally require?

A Remove unsuitable loose material, trim to the approved profile, and obtain any required inspection or approval before placing the next construction layer. B Conceal the loose material under foundation concrete without inspection. C Excavate the entire foundation an arbitrary additional depth to ensure that all high spots disappear. D Add random construction debris to the trench bottom to correct its level.

Question 24 ప్రశ్న 24

Two identical rectangular isolated foundation pits are required. Each pit has authorized plan dimensions of 3.00 m by 2.00 m, an existing ground RL of 105.40 m and an excavation-bottom RL of 103.60 m. Assuming uniform ground level, vertical sides and no extra excavation, what is their combined in-situ excavation quantity?

A 10.80 m3. B 18.00 m3. C 32.40 m3. D 21.60 m3.

Question 25 ప్రశ్న 25

Consider the following earthwork specification statements: (1) Setting-out controls and approved levels should be established before excavation. (2) Trench sides must remain stable under the actual ground and construction conditions. (3) Approved filling should be placed and compacted in compliant layers, with acceptance testing where specified. (4) Extra unauthorized excavation automatically qualifies for additional payment. Which statements are technically correct?

A 1 and 4 only. B 2, 3 and 4 only. C 1, 2 and 4 only. D 1, 2 and 3 only.

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