“150”, Aptitude Test Questions and Answers for Civil Technician II (Rail Track Technology) – TRC.
ABSTRACT
This preparation material contains 150
multiple-choice aptitude test questions and answers for candidates preparing
for the Civil Technician II (Rail Track Technology) position at Tanzania
Railways Corporation (TRC). The questions cover railway track technology,
permanent way maintenance, track geometry, bridges and culverts, soil and
construction materials, surveying, engineering drawings, construction quality
control, safety, and practical technical judgment. The questions are designed
to assess understanding, application of technical knowledge, problem-solving
ability, and decision-making rather than simple memorization, reflecting the
practical nature of public service online aptitude assessments in Tanzania.
Prepared by Civil Technician II (Rail
Track Technology) – TRC.
Compiled by Civil Technician II (Rail
Track Technology) – TRC.
0628729934.
Date: September 15, 2026
Dear applicants,
This collection of questions and answers
has been prepared to help all of you to understand the key areas tested during
the interview. The goal is to provide a useful, and practical study guide so
you can all perform confidently and fairly in the selection process. I wish you
the best of luck, and may this resource support you in achieving success!
Warm regards,
Civil Technician II (Rail Track Technology)
– TRC.
For Personal Use by Applicants Preparing
for Civil Technician II (Rail Track Technology) – TRC - at Public Service
Recruitment Service.
Civil
Technician II (Rail Track Technology) – TRC.
150 Aptitude
Test Questions and Answers
1. During inspection of a railway section,
the track geometry is found to deteriorate rapidly after tamping even though
the ballast quantity appears adequate. Which condition should be investigated MOST
critically before carrying out repeated tamping?
A. Condition of
the rail surface and fastening components B. Condition of the underlying
formation and drainage C. Spacing of sleepers and condition of rail joints D.
Alignment of adjacent track and ballast shoulder
Answer: B
Rationale: Rapid recurrence of track deformation
after tamping can indicate that the problem originates below the ballast rather
than from inadequate tamping itself. A weak or poorly drained formation may
deform under repeated axle loads, causing the ballast and track geometry to
settle again soon after maintenance. Investigating the formation and drainage
therefore addresses the underlying cause rather than repeatedly correcting the
visible track defect. Rail condition, fastenings, sleeper spacing and alignment
are also important, but they would not most directly explain recurring
settlement caused by an unstable foundation.
2. A technician is reviewing a track
construction drawing and notices that the dimensions shown on the plan differ
from those shown on the corresponding sectional drawing. What should the
technician do FIRST?
A. Use the larger
dimension to avoid under-sizing the structure B. Use the dimension appearing
on the latest drawing sheet C. Refer the discrepancy to the supervisor or
design authority D. Average the two dimensions before commencing construction
Answer: C
Rationale: A discrepancy between drawings should not
be resolved by personal assumption, averaging dimensions, or automatically
selecting the larger value. The technician must establish which information is
authoritative before construction proceeds because an incorrect interpretation
can result in non-conforming work, material wastage or structural problems.
Referring the discrepancy to the supervisor or responsible design authority
provides a controlled technical resolution and ensures that construction
follows the approved design documentation.
3. A railway track constructed on a
low-lying section experiences repeated water accumulation beside the track
after heavy rainfall. The ballast remains saturated for extended periods. Which
intervention would MOST directly address the underlying problem?
A. Increasing
ballast shoulder width without correcting the drainage system B. Increasing
ballast depth while retaining the existing drainage arrangement C. Replacing
selected sleepers without addressing the water accumulation D. Restoring
effective drainage and correcting the formation profile
Answer: D
Rationale: Persistent water accumulation indicates
inadequate drainage or an unsuitable formation profile. Saturated formation and
ballast can substantially reduce track stability and accelerate settlement and
deterioration. Restoring drainage and ensuring that the formation allows water
to leave the track structure addresses the source of the problem. Simply adding
ballast may temporarily improve the track level but does not eliminate the
water problem, while fastening torque and sleeper spacing do not provide an effective
drainage solution.
4. When inspecting a railway curve, a
technician finds that the track has been constructed with insufficient cant for
the operating conditions specified in the design. Which consequence is MOST
likely if the deficiency remains uncorrected?
A. Increased
lateral forces and discomfort during train movement B. Reduced compressive
strength of the concrete sleepers C. Increased drainage capacity along the
outside rail D. Reduced resistance of ballast to vertical loading only
Answer: A
Rationale: Cant is provided on a railway curve to
help balance the lateral effects associated with train movement around the
curve. If the installed cant is insufficient for the specified operating
conditions, greater unbalanced lateral acceleration and forces can occur,
potentially affecting passenger comfort, wheel-rail interaction and track
stability. Cant deficiency is therefore principally associated with the lateral
behavior of trains on curves rather than concrete sleeper strength or drainage
performance.
5. A laboratory report for a proposed track
formation material shows that its moisture content during compaction is
substantially below the material's optimum moisture content. What is the MOST
appropriate interpretation?
A. The material
will necessarily achieve maximum density under the condition B. Additional
compaction effort may not produce the intended maximum dry density C. The
material should automatically be rejected regardless of soil type D. The low
moisture condition guarantees improved long-term bearing capacity
Answer: B
Rationale: Soil compaction is strongly influenced by
moisture content. When a soil is significantly drier than its optimum moisture
content, particles may not rearrange efficiently despite applied compactive
effort, making it difficult to achieve the intended dry density. This does not
mean the material must automatically be rejected, because suitability depends
on the soil and project requirements. Moisture adjustment followed by
appropriate compaction and verification may therefore be required.
6. During maintenance, a technician observes
that a section of track has a local low spot but the surrounding track remains
stable and correctly aligned. Which maintenance activity would MOST directly
restore the track geometry?
A. Replacing all
sleepers within the entire maintenance section B. Removing fastening
components from the affected rail C. Correcting the vertical level through
appropriate tamping D. Increasing the width of the ballast shoulder beside the
track
Answer: C
Rationale: A localized low spot is primarily a
vertical track geometry defect. Appropriate tamping can lift and consolidate
the affected track section so that the designed level and longitudinal profile
are restored. Replacing all sleepers would normally be excessive unless sleeper
defects are identified, while removing fastenings or widening the ballast
shoulder does not directly correct the vertical irregularity. The maintenance
response should therefore correspond to the specific geometry defect
identified.
7. A newly constructed culvert beneath a
railway embankment shows water passing through its barrel, but erosion is
developing at the outlet. Which condition should receive priority attention?
A. Increasing the
ballast depth directly above the culvert outlet B. Increasing the culvert
barrel length without assessing the discharge condition C. Strengthening the
railway formation above the culvert before treating the outlet D. Providing
adequate outlet protection against erosion
Answer: D
Rationale: Water flowing successfully through the
culvert but causing erosion at the outlet indicates that the discharge energy
is not being adequately controlled. Continued erosion can undermine the outlet,
surrounding soil and potentially the railway embankment. Appropriate outlet
protection, such as suitable energy dissipation or erosion-resistant measures
specified by the design, should therefore be investigated and implemented. The
issue is not primarily the culvert's concrete appearance, reinforcement visibility
or formation width.
8. While checking a track construction
project, a technician discovers that the installed rail type differs from the
rail section specified in the approved drawings, although the installed rail
appears structurally adequate. What is the BEST action?
A. Accept the
rail because its apparent strength is satisfactory B. Record the deviation and
seek technical approval before acceptance C. Replace the rail immediately
without informing the supervisor D. Accept the rail if its dimensions are
close to those specified
Answer: B
Rationale: Construction must conform to approved
designs and specifications, and apparent structural adequacy does not
automatically authorize substitution of specified materials. A different rail
section may have implications for compatibility, weight, fastening systems,
geometry, maintenance and operational requirements. The deviation should
therefore be documented and referred through the appropriate technical approval
process before the work is accepted. This protects both quality control and the
integrity of the approved project design.
9. A technician is required to establish the
gradient between two points along a proposed railway alignment. Point A has a
reduced level of 1,245.60 m and Point B has a reduced level of 1,249.20 m. If
the horizontal distance between the points is 600 m, what is the gradient
expressed as a percentage?
A. 0.30% B.
0.45% C. 0.60% D. 0.75%
Answer: C
Rationale: The difference in level is 1,249.20 −
1,245.60 = 3.60 m. Gradient as a percentage is calculated as vertical
difference divided by horizontal distance multiplied by 100. Therefore, (3.60 ÷
600) × 100 = 0.60%. Correct interpretation of levels and horizontal
distance is essential because railway gradients directly influence alignment
design, train movement and construction requirements.
10. During track inspection, several adjacent
sleepers are found cracked while the rails and ballast appear generally
satisfactory. Which investigation would be MOST useful before deciding
the extent of replacement?
A. Determine
whether the sleeper defects are isolated or systematic B. Determine whether
the ballast depth is uniform throughout the section C. Determine whether the
rail joints require additional maintenance D. Determine whether the track
alignment remains within the applicable tolerance
Answer: A
Rationale: When several adjacent sleepers show
similar defects, the technician should determine whether the damage represents
isolated failures or a systematic problem associated with manufacturing,
installation, loading, handling or site conditions. This assessment helps
establish whether localized replacement is adequate or whether a wider
intervention is necessary. Increasing ballast depth or changing the gradient
would not directly diagnose the sleeper problem, while rail temperature is
relevant to certain rail-maintenance considerations but does not explain the
primary sleeper defect.
11. A track maintenance team is preparing its
work plan for a section where inspection records show recurring defects at
approximately the same location after every rainy season. Which approach would
provide the BEST basis for planning the maintenance?
A. Schedule
identical repairs at shorter intervals without further investigation B.
Prioritize the location and investigate the recurring underlying cause C.
Replace all rails in the section before the next rainy season D. Increase
inspection frequency while leaving the existing defect untreated
Answer: B
Rationale: Recurring defects at the same location
indicate that routine repairs may be treating symptoms rather than the
underlying cause. A sound maintenance plan should use inspection history to
identify recurring risk locations and investigate factors such as drainage,
formation weakness, settlement or structural deficiencies. Once the cause is
established, the appropriate corrective work can be planned. Simply repeating
the same repair more frequently may increase maintenance costs without
achieving durable improvement.
12. A soil sample taken from beneath a
proposed railway formation is being prepared for laboratory testing. Why is
representative sampling particularly important?
A. It ensures
that the laboratory equipment operates at maximum capacity B. It guarantees
that the soil will meet the project specification C. It prevents the need for
field inspection during construction D. It allows laboratory results to
reasonably represent the material in the field
Answer: D
Rationale: Laboratory test results are meaningful
only when the sample reasonably represents the material being assessed in the
field. A poorly selected or contaminated sample can produce results that do not
reflect actual site conditions and may lead to inappropriate construction
decisions. Representative sampling therefore connects laboratory findings with
the real material used or encountered on the project. It does not itself
guarantee compliance, eliminate field inspection or improve laboratory
equipment performance.
13. A railway embankment is being constructed
using compacted soil layers. Field density tests indicate that the required
density has not been achieved in one layer. What should generally happen BEFORE
placing the next layer?
A. Cover the
deficient layer with ballast to increase its apparent density B. Continue
construction and correct the density after completing the embankment C.
Investigate the cause and bring the layer into the specified condition D.
Reduce the thickness of the next layer to compensate for the deficiency
Answer: C
Rationale: Each compacted layer should satisfy the
applicable construction requirements before subsequent layers conceal the
deficient work. The technician should investigate factors such as moisture
content, material condition, layer thickness and compaction effort, then ensure
that the layer achieves the specified requirement before proceeding. Covering
or compensating for deficient work does not correct the underlying quality
problem and can make later remediation considerably more difficult.
14. A railway drawing is prepared at a scale
of 1:1000. A straight section of track measures 75 mm on the drawing. What is
its corresponding horizontal distance on the ground?
A. 7.5 m B. 75 m C.
750 m D. 7,500 m
Answer: B
Rationale: A scale of 1:1000 means that one unit
measured on the drawing represents 1,000 of the same units on the ground.
Therefore, 75 mm × 1,000 = 75,000 mm, which is equivalent to 75 m.
Correct scale interpretation is essential when extracting dimensions and
distances from engineering drawings, particularly where construction
setting-out depends on information shown graphically.
15. A technician inspecting a bridge carrying
a railway line notices longitudinal cracking in a concrete structural member.
The crack pattern appears to be increasing over time. What should be the MOST
appropriate initial response?
A. Paint over the
cracks to prevent further surface deterioration B. Remove the ballast above
the bridge before assessing the cracks C. Ignore the cracks unless concrete
fragments begin falling D. Record and report the condition for appropriate
structural assessment
Answer: D
Rationale: Progressive cracking in a structural
member should be treated as a potentially significant defect, particularly on a
railway bridge subject to repeated dynamic loading. The technician should
accurately record its location, extent and apparent progression and report it
for appropriate engineering assessment. Painting over the cracks can conceal
evidence, while waiting for concrete fragments to fall is unsafe. Removing
ballast may sometimes form part of an investigation, but it is not the
appropriate first response to an unexplained structural crack.
16. During inspection of a ballasted track,
the ballast is found contaminated with a significant amount of fine material.
Which effect is MOST likely to result if the condition becomes severe?
A. Improved
drainage because the particles fill voids between ballast stones B. Reduced
drainage and increased difficulty in maintaining stable track geometry C.
Increased rail hardness because the ballast becomes more densely packed D.
Improved track flexibility because fine particles reduce ballast movement
Answer: B
Rationale: Clean ballast relies on interconnected
voids to provide drainage and contribute to effective load distribution.
Excessive fine contamination fills these voids, reducing permeability and
drainage while potentially affecting ballast behavior and track geometry
stability. Although some degree of consolidation is desirable, excessive fines
can create a poorly draining and less effective track bed. The condition should
therefore be assessed and managed according to the applicable maintenance
requirements.
17. A technician finds that a railway track
has developed a gradual lateral deviation over a considerable distance rather
than a sharp localized defect. Which measurement would be MOST relevant
to confirming the nature of the defect?
A. Track
alignment measurements along the affected section B. Cross-level measurements
at selected points along the affected section C. Gauge measurements at the
locations showing the greatest lateral movement D. Longitudinal-level
measurements along the affected section
Answer: A
Rationale: A gradual lateral deviation is
fundamentally an alignment or horizontal geometry issue. Measuring the track
alignment along the affected section allows the technician to determine the
magnitude, location and progression of the deviation against the designed or
permissible geometry. Sleeper concrete strength, ballast moisture and rail
markings may be relevant to other inspections but would not directly establish
the nature of a horizontal track alignment defect.
18. A concrete sample from a railway drainage
structure is tested in a laboratory and produces a compressive strength result
below the specified requirement. What should the technician MOST
appropriately conclude?
A. The entire
structure must automatically be demolished B. The result can be ignored if the
structure appears visually sound C. The result indicates a potential
non-conformity requiring technical evaluation D. The concrete is acceptable
because laboratory results vary naturally
Answer: C
Rationale: A test result below the specified
requirement indicates potential non-conformity and should trigger appropriate
investigation rather than an automatic demolition decision or dismissal of the
result. The responsible technical personnel may need to verify sampling,
testing procedures, curing, concrete age and other relevant factors and
determine the appropriate disposition under the project quality procedures.
Visual appearance alone cannot establish the required structural performance,
and normal testing variability does not automatically make a failed result
acceptable.
19. A railway maintenance drawing specifies a
drainage channel with a continuous longitudinal fall. During site inspection,
the technician finds that a section has been constructed nearly level. What is
the PRIMARY concern?
A. The channel
may provide reduced support to the track structure B. Water may fail to flow
effectively and could accumulate along the channel C. The channel may
experience increased structural loading from passing trains D. Water may be
diverted toward the rail rather than toward its intended discharge point
Answer: B
Rationale: A drainage channel requires an
appropriate longitudinal gradient so that water can move toward its intended
discharge point. A nearly level section can reduce hydraulic effectiveness and
create stagnant water or localized accumulation, potentially contributing to
saturation and deterioration of nearby formation materials. The main concern is
therefore drainage performance. The other options do not represent the direct
consequence of constructing the channel with insufficient longitudinal fall.
20. While reviewing a project specification,
a technician notices that the material proposed by a contractor has properties
similar to the specified material but is not the material identified in the
approved documentation. What should guide the technician's decision to accept
the substitution?
A. The
contractor's previous experience with the alternative material B. The visual
similarity between the proposed and specified materials C. The material's
availability and lower procurement cost D. Compliance with approved
substitution and technical requirements
Answer: D
Rationale: Material substitution should be
controlled through the project's approved technical and quality procedures.
Similar appearance, contractor experience or lower cost does not establish that
an alternative material satisfies the design requirements. The proposed
material should be technically evaluated against the relevant specifications
and formally approved through the appropriate process before use. This ensures
that construction remains consistent with the approved design and applicable
permanent-way requirements.
21. A track section has correct gauge at one
inspection point, but measurements taken at successive points show alternating
widening and narrowing of the gauge. Which interpretation is MOST
appropriate?
A. The track may
have a variable gauge defect requiring systematic investigation B. The
readings may indicate inconsistent lateral restraint or local track deformation C.
The variation confirms that the rails are undergoing uniform thermal expansion D.
The variation confirms that the ballast has adequate lateral resistance
Answer: A
Rationale: Railway gauge must be controlled within
the applicable limits along the track, not merely averaged over a section.
Alternating widening and narrowing can indicate irregular track geometry,
sleeper or fastening problems, inadequate restraint, or other permanent-way
defects. Such variation requires systematic investigation to determine its
cause and extent. An acceptable average cannot automatically compensate for
individual locations that exceed permissible limits, and the observation does
not by itself prove thermal expansion or culvert drainage failure.
22. During construction of a railway
formation, the technician observes that the specified layer thickness is being
exceeded before compaction. Why is this condition potentially significant?
A. Thicker layers
always produce greater final density after compaction B. Excessive layer
thickness may prevent uniform compaction throughout the layer C. Thicker
layers automatically reduce the moisture content of the soil D. Excessive
thickness mainly affects the appearance of the finished embankment
Answer: B
Rationale: Compaction equipment has a practical
depth within which it can effectively densify the material. If a soil layer is
placed substantially thicker than specified, the lower portions may receive
insufficient compactive energy and remain inadequately compacted even when the
upper surface appears satisfactory. This can create variable density and weaken
the formation. Layer thickness therefore forms an important part of
construction quality control and should comply with the approved method and
specification.
23. A railway bridge approach shows a
noticeable change in level between the embankment and the bridge deck, causing
repeated impact from passing trains. Which condition should be investigated
FIRST?
A. The color of
the bridge deck concrete B. The type of rail fastening used on the bridge C.
Differential settlement of the approach and transition zone D. The width of
the ballast shoulder beyond the bridge
Answer: C
Rationale: A noticeable change in level at a bridge
approach can result from differential settlement between the railway embankment
and the relatively rigid bridge structure. Repeated train loading can make this
transition particularly sensitive, producing impact and progressive track
geometry deterioration. The approach and transition zone should therefore be
investigated for settlement, drainage, compaction and related defects.
Fastening type and ballast shoulder width may influence other aspects of track
performance but do not most directly explain a level difference between the
bridge and approach.
24. A maintenance supervisor asks a
technician to prepare a track maintenance plan for a section with several
recorded defects of different severity. Which factor should MOST strongly
influence the order in which the work is planned?
A. The age of
each recorded defect and the order in which it was reported B. The
availability of materials and equipment at the maintenance depot C. The
accessibility of each defect to the maintenance team D. Safety risk, defect
severity and operational consequences
Answer: D
Rationale: Maintenance planning should prioritize
defects according to their risk and effect on safe and reliable railway
operation. A defect presenting a significant safety risk or having serious
operational consequences should normally receive greater priority than a minor
defect, regardless of when it was recorded, material availability or distance
from a station. Effective planning therefore combines inspection findings with
risk, severity, operational importance and available resources while ensuring
that urgent safety-related work is addressed appropriately.
25. During inspection of a railway
construction project, the technician discovers that the completed track
formation generally follows the approved dimensions, but the surface has
localized soft areas that deform when loaded. Which assessment would be MOST
important before accepting the formation?
A. Whether the
formation meets the required strength and compaction criteria B. Whether the
formation surface has the required finished dimensions and cross-section C.
Whether the formation material complies with the specified material
requirements D. Whether the drainage and moisture conditions are consistent
with the design requirements
Answer: A
Rationale: Correct dimensions alone do not
demonstrate that a railway formation is suitable for service. Localized soft
areas can indicate inadequate compaction, unsuitable material, excessive
moisture, weak subgrade or other geotechnical problems that may lead to settlement
and track geometry deterioration. The technician should therefore verify the
required strength, density, moisture condition and other applicable acceptance
criteria before the formation is accepted. Visual conformity of dimensions is
important, but functional and material performance requirements are equally
critical.
26. During inspection of a railway curve, the
measured gauge remains within the applicable limit, but the cant changes
noticeably between successive measurement points. What is the MOST important
concern?
A. The variation
may reduce the durability of rail fastening components B. The variation may
reduce the compressive strength of concrete sleepers C. The variation may
increase the resistance of ballast to vertical loading D. The variation may
cause inconsistent vehicle response through the curve
Answer: D
Rationale: Cant is an important component of railway
curve geometry because it helps accommodate the lateral effects experienced by
trains negotiating a curve. Significant variation in cant between successive
points can produce inconsistent cross-level conditions and therefore
inconsistent vehicle response, potentially affecting ride quality, wheel-rail
forces and track stability. The fact that gauge remains within its limit does
not mean that other geometry parameters are satisfactory. Sleeper strength,
ballast vertical resistance and fastening durability are not direct
consequences of cant variation.
27. A technician is inspecting a rail joint
that repeatedly becomes loose even after its fasteners have been tightened.
Which investigation would provide the BEST basis for identifying the
cause?
A. Assess the
ballast shoulder width without examining the joint assembly B. Examine the
joint components, rail ends, sleeper support and surrounding track condition C.
Reduce the number of sleepers supporting the jointed rails to increase
flexibility D. Increase the depth of the nearest drainage channel without
inspecting the joint
Answer: B
Rationale: Repeated loosening of a rail joint
suggests that tightening the fasteners alone is not addressing the underlying
problem. The technician should examine the complete joint assembly, including
joint bars, bolts, rail ends, sleeper support, ballast condition and local
track geometry. Defective components, inadequate support or repeated movement
can contribute to joint instability. Other maintenance features may be relevant
in particular circumstances, but they do not provide as direct a diagnostic
basis as examining the joint and its supporting track condition.
28. A railway formation material has
acceptable grading, but site investigation indicates that the area is likely to
remain wet because of poor drainage. Which property is MOST important
when assessing the material's suitability?
A. Its resistance
to surface discoloration during prolonged exposure B. Its ability to maintain
visible grading characteristics after placement C. Its engineering behavior
and strength under sustained moisture conditions D. Its resistance to
deterioration from ultraviolet exposure after construction
Answer: C
Rationale: Formation material must perform
adequately under the moisture conditions likely to occur in service. A material
that appears suitable when relatively dry may lose strength, become more
compressible or deform when exposed to prolonged moisture. Since poor drainage
increases the likelihood of saturation, its engineering behavior under wet
conditions is particularly important. Surface appearance, ultraviolet
resistance and retention of visible grading characteristics do not adequately
establish formation performance.
29. While setting out a railway drainage
structure from an approved drawing, a technician discovers that the proposed
excavation would intersect an existing utility that is not shown on the
drawing. What should the technician do BEFORE excavation continues?
A. Shift the
structure to the nearest convenient position and record the change later B.
Continue excavation cautiously because the approved drawing remains the
controlling document C. Expose the full excavation area first and determine
the utility's significance afterward D. Stop the affected work and refer the
discrepancy through the appropriate technical and supervisory process
Answer: D
Rationale: An existing utility that conflicts with
the approved setting-out information represents an unforeseen site condition
with potential safety, service and design implications. The affected excavation
should not proceed on the basis of an assumption that the drawing is complete.
The discrepancy should be documented, the area protected and the matter
referred through the appropriate technical and supervisory process.
Unauthorized relocation or continued excavation could result in damage, unsafe
conditions or construction that does not conform to the approved design.
30. A railway embankment is to be constructed
across natural ground that has a significant transverse slope. Which
preparation is MOST appropriate before placing the embankment fill?
A. Provide
suitable benching or other approved ground preparation to improve stability B.
Increase the cant of the completed railway track to compensate for the ground
slope C. Reduce the specified compaction requirement on the lower side of the
embankment D. Place a layer of ballast directly on the natural ground before
beginning the embankment
Answer: A
Rationale: Significant transverse slopes can create
an unfavorable interface between existing ground and new embankment fill,
increasing the risk of sliding or differential movement. Suitable preparation,
such as benching where required by the design and site conditions, provides
better interlock and a more stable foundation for the embankment. Track cant
does not correct earthwork instability, while reducing compaction requirements
would weaken the embankment. Ballast is also not a substitute for proper
embankment foundation preparation.
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