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Public road administration (PRA) system is based on _____________

(a) Particle-size composition and Plasticity characteristics

(b) Particle size distribution

(c) All of the mentioned

(d) None of the mentioned

I had been asked this question in an online interview.

My question is taken from Soils topic in chapter Classification of Soils of Geotechnical Engineering I

1 Answer

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Best answer
Correct option is (a) Particle-size composition and Plasticity characteristics

To explain: HRB classification system, also known as public road administration (PRA) is based on both the particle-size composition and plasticity characteristics.

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