Intermediate Mine Environmental Control Certificate Exam Practice Questions - Intermediate Certificate In Mine Environmental Control (South Africa) Exam

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When using a Pitot-static tube to measure airflow in a fan duct, why are the static pressure sensing holes positioned perpendicular to the airflow direction?

To eliminate the kinetic energy (velocity pressure) effect and sense pure static pressure To amplify the impact pressure for higher measurement accuracy To prevent dust particles from clogging the impact tip orifice To create a Venturi restriction for differential flow calculation

Correct Answer:

To eliminate the kinetic energy (velocity pressure) effect and sense pure static pressure

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