IRRSP - Industrial Radiography Radiation Safety Personnel Radiation Safety Fundamentals Questions and Answers

Question 1

An industrial radiographer measures an intensity of 200 mR/hr at a distance of 3 feet from a sealed source.
If the radiographer moves to a distance of 12 feet from the source, what will the new radiation intensity be?

Accepted Answer

12.5 mR/hr

Answer

50 mR/hr

Answer

25 mR/hr

Answer

100 mR/hr

Question 2

Which of the following is considered a primary characteristic of a stochastic effect of radiation exposure?

Accepted Answer

The probability of the effect occurring increases with dose.

Answer

A dose threshold must be exceeded for the effect to occur.

Answer

The severity of the effect increases with the dose received.

Answer

The effect is typically observed within hours or days of exposure.

Question 3

A radiographer needs to perform a 10-minute task in a radiation field of 120 mrem/hr. What is the total dose the radiographer will receive?

Accepted Answer

20 mrem

Answer

12 mrem

Answer

60 mrem

Answer

1200 mrem

Question 4

The three fundamental principles for controlling external radiation exposure, often associated with the ALARA concept, are:

Accepted Answer

Time, Distance, and Shielding

Answer

Monitoring, Documentation, and Reporting

Answer

Calibration, Surveying, and Leak Testing

Answer

Alpha, Beta, and Gamma

Question 5

The amount of shielding material required to reduce the intensity of a gamma ray beam to one-half of its original value is known as the:

Accepted Answer

Half-Value Layer (HVL)

Answer

Linear Attenuation Coefficient

Answer

Tenth-Value Layer (TVL)

Answer

Specific Gamma-Ray Constant

Question 6

Which of the following instruments is designed to measure an individual's accumulated radiation dose over a period of time, rather than the instantaneous dose rate?

Accepted Answer

Thermoluminescent Dosimeter (TLD)

Answer

Geiger-Mueller (GM) Survey Meter

Answer

Ion Chamber Survey Meter

Answer

Audible Alarming Ratemeter

An industrial radiographer measures an intensity of 200 mR/hr at a distance of 3 feet from a sealed source.If the radiographer moves to a distance of 12 feet from the source, what will the new radiation intensity be?

An industrial radiographer measures an intensity of 200 mR/hr at a distance of 3 feet from a sealed source.
If the radiographer moves to a distance of 12 feet from the source, what will the new radiation intensity be?