NDT - Non-Destructive Testing Radiographic Testing Safety Questions and Answers

Question 1

The fundamental principle of radiation protection, which states that all radiation exposure should be kept as low as reasonably achievable, is known by what acronym?

Accepted Answer

ALARA

Answer

ALARP

Answer

OSHA

Answer

SCUBA

Question 2

A radiographer is setting up for a field radiographic exposure. Which of the following is the immediate priority upon discovering that their radiation survey meter is not functioning correctly?

Accepted Answer

Stop all radiographic operations until a calibrated, functioning survey meter is available.

Answer

Proceed with the exposure but use a teammate's survey meter for the post-shot survey.

Answer

Complete the setup but do not expose until a new battery is installed.

Answer

Estimate the boundary based on previous similar setups and proceed with caution.

Question 3

During a gamma radiography operation, the source fails to retract into the shielded position. What is the radiographer's MOST critical first action?

Accepted Answer

Secure the controlled area to prevent unauthorized entry and then notify the Radiation Safety Officer (RSO).

Answer

Immediately attempt to manually retract the source using emergency tools.

Answer

Quickly dismantle the guide tube to identify the location of the stuck source.

Answer

Leave the site immediately to find the RSO and report the incident in person.

Question 4

Which of the following is a key safety advantage of using an X-ray generator compared to a gamma-ray source for industrial radiography?

Accepted Answer

The radiation from an X-ray tube can be turned off completely.

Answer

X-ray equipment is always more portable and requires no power source.

Answer

X-ray sources provide better penetration for very thick steel sections.

Answer

Gamma-ray sources decay over time, making them less predictable.

Question 5

A "High Radiation Area" must be posted where an individual could receive a dose equivalent in excess of:

Accepted Answer

100 mrem in 1 hour at 30 cm from the source.

Answer

2 mrem in 1 hour at 30 cm from the source.

Answer

5 mrem in 1 hour at 30 cm from the source.

Answer

500 mrem in 1 hour at 30 cm from the source.

Question 6

Which of the following personnel monitoring devices is designed to provide an immediate, real-time reading of accumulated radiation dose and often includes an alarm feature?

Accepted Answer

Electronic Personal Dosimeter (EPD)

Answer

Film Badge

Answer

Thermoluminescent Dosimeter (TLD)

Answer

Optically Stimulated Luminescence (OSL) Dosimeter