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Engineering Technician

NICET Construction Materials Testing Soils Level II Exam Practice Test

Soils materials testing examines how soil samples are collected, prepared, measured, and documented for construction work. This practice page addresses concepts such as gradation by sieve analysis, moisture and plasticity calculations, field density measurements, and interpreting results from tests used to characterize soil behavior and support earthwork decisions.

Exam overview

Exam providerNational Institute for Certification in Engineering Technologies
Exam codeNot listed
CategoryEngineering Technician

About the NICET Construction Materials Testing Soils Level II Exam

Technicians must preserve sample identity and condition from collection through laboratory testing, and account for material loss before reporting gradation results. Sieve analysis requires controlled separation and accurate mass accounting; Atterberg limits require calculating plasticity index from liquid and plastic limits. Field work may involve standard penetration testing and nuclear gauge measurements, where N-values, instrument setup, surface contact, and applicable checks affect interpretation. Soil strength testing also involves understanding how applied normal force relates to direct shear behavior. Reliable reporting depends on traceable worksheets, correct instrument identification, and following project documentation procedures when records need correction. These skills help technicians distinguish a valid measurement from a result affected by handling, equipment, or procedural problems.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A soil sample is collected for laboratory classification testing. Which handling approach best preserves the sample's identity and traceability?

  1. ALabel it with a unique identification and relevant collection information, and maintain that identification through testing
  2. BCombine it with other samples from the project before assigning a label
  3. CRecord only the date of testing, because collection details are unnecessary
  4. DRemove the label once the sample reaches the laboratory
Show answerCorrect answer: A

Clear identification and collection records help ensure test results can be linked to the correct location and sample. Combining or unlabeled handling can invalidate that association.

Question 2

A soil sample is being prepared for a test that requires material passing a specified sieve. What should the technician do with particles retained on that sieve?

  1. ASeparate and exclude them from the test portion, while documenting the preparation as required by the procedure.
  2. BCrush them until they pass through, regardless of the test method.
  3. CReturn them to the test portion without recording their presence.
  4. DDiscard the entire sample and report no result.
Show answerCorrect answer: A

When a method specifies a test fraction passing a sieve, the retained fraction is separated rather than arbitrarily crushed or mixed back in. The technician should follow the applicable procedure and record relevant preparation details.

Question 3

During a sieve analysis, the total recovered mass is substantially less than the initial dry mass. What should the technician do before reporting the gradation?

  1. AReport the measured percentages without comment because sieving always causes mass loss
  2. BInvestigate the discrepancy, including possible material loss or weighing error, and follow the applicable procedure for resolving it
  3. CAdd the missing mass to the pan fraction
  4. DNormalize the sieve percentages to 100% and omit the recovery issue
Show answerCorrect answer: B

A significant mass discrepancy can indicate loss during handling, incomplete transfer, or measurement error, and may make the gradation unreliable. The technician should investigate and document the issue and apply the governing test procedure rather than conceal it by assigning missing mass to a fraction or silently normalizing results.

Question 4

A technician records a field test result but discovers that the instrument identification number was omitted from the worksheet. Why should this information be added or corrected through the project's documentation process?

  1. AIt allows the result to be traced to the equipment used and supports review of calibration and test records
  2. BIt changes the measured value to the nearest standard value
  3. CIt proves the soil meets the acceptance requirement
  4. DIt replaces the need to record the test location
Show answerCorrect answer: A

Equipment identification links a result to the instrument and its relevant calibration or verification records, helping reviewers assess traceability. It does not establish acceptance and does not replace recording the test location or other required data.

Question 5

A sieve shaker is used for a soil gradation test. What is the main reason to avoid shaking for an unnecessarily long period?

  1. AExtended shaking can cause particle breakdown or other changes that affect measured gradation
  2. BIt always increases the sample's specific gravity
  3. CIt converts fines into coarse particles through moisture loss
  4. DIt guarantees that all particles pass through the largest sieve
Show answerCorrect answer: A

Excessive mechanical agitation can abrade or break particles, changing the sample's gradation. Sieving should follow the applicable procedure and duration rather than continue without limit.

Question 6

A technician is performing a standard penetration test (SPT). What does the reported N-value represent?

  1. AThe number of hammer blows required to drive the sampler through the final 300 mm of the specified drive interval.
  2. BThe total number of blows used to advance the sampler through the entire borehole depth.
  3. CThe number of soil layers identified in the recovered sample.
  4. DThe sampler's final penetration depth in centimeters after one hammer blow.
Show answerCorrect answer: A

The SPT N-value is conventionally the sum of blows for the second and third 150 mm increments of a 450 mm drive, corresponding to the final 300 mm. The initial increment is treated as seating penetration.

Question 7

For a direct shear test, what is the principal role of the applied normal force on the specimen?

  1. AIt establishes the normal stress acting across the designated shear plane
  2. BIt measures the specimen's water content directly
  3. CIt determines the soil's particle-size distribution
  4. DIt eliminates the need to measure horizontal displacement
Show answerCorrect answer: A

The applied normal force, divided by the relevant shear-plane area, establishes normal stress. Shear resistance is then measured as the specimen is displaced along the imposed plane.

How to use this practice test

The free practice bank contains 50 questions, with up to 20 randomly selected for a session. Work through the scenarios on sample handling, sieve analysis, soil index properties, field equipment, and test interpretation, then use the displayed results to identify which procedures or calculations need another review.

Preparation tips

  • For sieve analysis, practice checking recovered mass against initial dry mass and deciding when a discrepancy must be resolved before reporting gradation.
  • Calculate plasticity index as liquid limit minus plastic limit, and explain what each limit measures in relation to soil consistency.
  • Review what the SPT N-value represents and how the applied normal force affects a direct shear specimen.
  • Before nuclear gauge measurements, check applicable standardization procedures and ensure the gauge is stably positioned on a suitable surface.
  • Practice completing traceable records, including sample identity and instrument identification, and correcting omissions through the project’s documentation process.
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