NRRPT Contamination and Airborne Control 3

Question 1

When performing personnel decontamination, which sequence is correct?

Accepted Answer

Resurvey while still in PPE, carefully remove PPE from outside-in, then shower and resurvey

Answer

The correct sequence minimizes spread: survey in PPE, carefully doff from cleanest surface outward, then shower and resurvey to confirm decontamination.

Question 2

What is the primary hazard associated with re-suspension of radioactive surface contamination?

Accepted Answer

Settled contamination becomes airborne and creates an inhalation hazard

Answer

Re-suspension converts fixed surface contamination into an airborne hazard, dramatically increasing the potential for internal contamination via inhalation.

Question 3

Which factor most directly determines the assigned protection factor (APF) of a respirator?

Accepted Answer

The respirator's ability to reduce the wearer's exposure relative to outside concentration

Answer

APF is defined as the maximum ratio of outside to inside concentration that a properly functioning respirator provides to a trained wearer.

Question 4

A radioactive liquid spill occurs on an open bench. What is the FIRST priority action?

Accepted Answer

Limit the spread of contamination by covering the spill with absorbent material

Answer

The immediate priority is containment — preventing the spill from spreading further — before notifications and decontamination begin.

Question 5

For alpha-emitting contamination, why is the smear (wipe) method the preferred survey technique rather than direct GM survey?

Accepted Answer

Alpha particles have very short range in air and cannot travel from a surface to the detector window

Answer

Alpha particles travel only a few centimeters in air, so unless the detector is in direct contact, activity on a surface cannot reach the tube; wipes bring material to a suitable counter.

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

(NRRPT) National Registry of Radiation Protection Technicians Practice Test

NRRPT Contamination and Airborne Control 3