NETTCP Field Testing 2

Question 1

When performing a nuclear density gauge test on a compacted asphalt layer, what safety precaution is mandatory before beginning?

Accepted Answer

Notify nearby workers and establish an exclusion zone

Answer

Nuclear gauges emit radiation, so workers must be notified and a safety exclusion zone established before use.

Question 2

A field technician collects a soil sample for moisture-density (Proctor) correlation and notices the sample bag has a hole. What is the correct action?

Accepted Answer

Re-sample from the same location using an intact container

Answer

Sample integrity is critical; a compromised container can cause moisture loss that invalidates test results, requiring re-sampling.

Question 3

During a concrete field test, the slump measured is 9 inches when the specification maximum is 5 inches. What should the technician do?

Accepted Answer

Reject the load and notify the inspector

Answer

A slump exceeding specification limits indicates excessive water content; the load must be rejected per AASHTO/ACI standards.

Question 4

What does a falling weight deflectometer (FWD) measure during pavement field testing?

Accepted Answer

Pavement layer deflection under a simulated load

Answer

The FWD drops a known weight onto the pavement and measures the resulting deflection basin to evaluate structural capacity.

Question 5

During a field sand cone density test, the technician spills some of the calibrated sand before completing the test. What is the correct response?

Accepted Answer

Void the test and start over with fresh calibrated sand

Answer

Spilled sand compromises the known volume measurement, so the test must be voided and repeated with properly calibrated sand.

(NETTCP) New England Transportation Technician Certification Program Practice Test

(NETTCP) New England Transportation Technician Certification Program Practice Test

NETTCP Field Testing 2