Radiation Safety Officer (RSO) Exam: Top Questions & Answers – Part 1

Introduction

  • The use of radiation is very important in medical, artificial, and exploration fields at this time, but if it is used incorrectly or exposed without safety measures, it can be very dangerous for health. This is why the role of a Radiation Safety Officer (RSO) becomes really important.
  • An Radiation Safety Officer(RSO) is a specialist trained and certified by a government organization who ensures that radiation is used in a safe and controlled manner in any organization. His job is not only to follow the rules and compliances but also to handle radiation monitoring, worker training, and emergency response. An Radiation Safety Officer(RSO) is not just a non-supervisory officer but a security guard who protects workers and the public from dangerous radiation items.

Table of Contents

What is radiation?

  • Radiation is such energy that travels through space or any medium in the form of waves or particles. This is a natural process that exists in every corner of the universe, whether it is sunlight, cosmic rays, or the emission of radioactive materials.

Radiation is divided into two main categories:

1. Ionizing Radiation (high energy)

  • This radiation carries so much energy that it can knock out the electrons of atoms. It can ionize them. For this reason, it can be dangerous for health because it can damage cells and DNA.

Examples:

  • X-rays (used for medical imaging)
    Gamma Rays (come from radioactive materials and nuclear reactions)
    Alpha & Beta Particles (hot emitted during radioactive decay)
    Neutron Radiation (derived from nuclear reactors and fission reactions)

Uses:

  • Cancer Treatment (Radiotherapy)
  • Industrial Radiography (Weld Testing)
  • Nuclear Power Generation

2. Non-Ionizing Radiation (Low Energy)

  • Non-ionizing radiation does not ionize atoms. Non-ionizing radiation is defined as electromagnetic radiation.
  • It is relatively safer, but excessive exposure can be harmful.

Examples:

  • Radio Waves (for Mobile networks and communication)
  • Microwaves (Microwave ovens and radar systems)
  • Infrared Radiation (Heat sensors and remote controls)
    Visible Light (light that gives us light)
  • Ultraviolet (UV) Rays (come from the sun; excessive exposure can cause skin cancer)

Uses:

  • Communication (Radio and TV signals)
  • Cooking (Microwaves)
  • Night Vision Devices (Infrared)
  • Tanning Beds (UV Light)

What is a Radiation Safety Officer (RSO)?

  • Radiation Safety Officer(RSO) is a certified professional radiation safety officer who takes care of the rules and compliance of radiation safety in any organization and keeps given information and alerts the people working there about radiation from time to time. His job is to ensure that radiation is used in the right way so that there is no effect of radiation on the health of workers or the general public.

Responsibilities of RSO:

  • Implementation of Radiation Protection Program: The Radiation Safety Officer ensures that safety guidelines and SOPs are followed.
  • Regulatory Compliance: It is the job of the Radiation Safety Officer to implement the guidelines of government agencies like AERB (Atomic Energy Regulatory Board) and IAEA (International Atomic Energy Agency).
  • Monitoring and Dosimetry: The job of the Radiation Safety Officer is to measure radiation exposure and maintain dose limits.
  • Training and Awareness: The Radiation Safety Officer educates workers and employees from time to time about radiation hazards and safety measures.
  • Emergency Response: In case of an emergency, like a radiation leak or accidental exposure, immediate action has to be taken.

What is required to become an RSO?

  • Degree: Must have a degree in physics, engineering, or radiation science.
  • Radiation Safety Training: such courses that are approved by regulatory bodies.
  • Work Experience: Experience working in the Radiation Safety field is required.
  • Certification and Licensing: Certification and license have to be taken according to the specific rules of each country.

Conclusion

  • Today, the safe use of radiation has become a legal and ethical responsibility. Every organization that uses radiation needs to have a trained and certified Radiation Safety Officer (RSO). This is not just a question of regulatory compliance but also a major issue of worker’s health, environmental safety, and accident prevention. The Radiation Safety Officer is the unsung hero who takes care of every small and big safety issue related to radiation so that there is no hazard in the industry and the industry runs smoothly.
    If you want to become a Radiation Safety Officer (RSO), it is very important to get qualification, training, and certification.

FAQ About Radiation Safety Officer (RSO)

Is exposure to radiation harmful?

Yes, if exposure to ionizing radiation is excessive, it can cause cancer, burns, and genetic damage. Therefore, safety measures are very important.

  • Radiation is used in fields like medical (X-rays, CT scans), nuclear power plants, industrial radiography, food sterilization, and space science.
  • This depends on the country and experience, but the salary of an experienced Radiation Safety Officer (RSO) can be up to ₹5-15 lakh per annum.

Absolutely! Radiation is positively used for medical diagnosis (X-rays, MRI), cancer treatment (radiotherapy), and industrial testing (non-destructive testing).

  • RSO work is not that risky if proper safety measures are followed. Exposure is minimized with protective suits, proper shields, dosimeters, and a controlled environment.

Top 20 RSO Exam MCQ

Que1: Which of these conditions comes under the orphan source?

a) Abandoned source     b) Theft of source   c) unregistered source d) all of the above
 
Answer: d) All of the above
Explanation: An orphan source is a radioactive source that has gone outside regulatory control. Abandoned sources (those that have been abandoned), stolen sources, and unregistered sources all fall into this category.
 
Que2: 3.7 GBq Co60 at Jan 2011, what will be the source half-life at April 2016?
a) 1.85Gbq     b) 1.85Mbq   c) 1850Kbq   d) all above
 

Answer: a) 1.85 GBq
Explanation: The half-life of Co-60 is 5.27 years. From Jan 2011 to April 2016, approx. 5.27 years have passed, i.e., one half-life has been completed.
After one half-life, the activity is half: 3.7/2 = 1.85 GBq

 
Que3:  3.4 J/Kg =_   Gy?
a) 3.4 Gy    b) 34 Gy   c) 340 Gy   d) 3.4 mGy
 
Answer: a) 3.4 Gy
Explanation: 1 Gray (Gy) = 1 J/Kg
So if 3.4 J/kg is given, then it will be 3.4 Gy.
 
Que4: Radiation weighing factor depends on 
a) half-life of source 
b) intensity of source
c) type of radiation 
d) all the above
 
Answer: c) Type of radiation
Explanation: Radiation weighing factor (WR) depends on the type of radiation and its biological impact. Half-life or intensity is not a direct factor.
 
Que5: Emergency preparedness plan is to be prepared by
a) Licensee   b) AERB    c) By source OEM    d) Employer
 
Answer: a) Licensee
Explanation: Radiation safety and emergency preparedness are the responsibility of the licensee, which follows the guidelines of AERB and other regulatory bodies.
 
Que6: Every six months, starry report submission in AERB website, which proforma
will take the place of?
a) Performa A     b) Performa C    c) Performa B     d) all of above
 
Answer: c) Performa B
Explanation: Performa B is used for submitting radiation safety reports that come under regulatory compliance.
 
Que7: Detector used for detecting neutrons. 
a) BF3 filled proportional counter   b) GM counter   c) ionization counter   d)  a&b
 
Answer: a) BF3 filled proportional counter
Explanation: The BF3 proportional counter is used to detect neutrons because it generates an electrical signal by reacting with neutrons.
 
Que8: Annual effective dose for occupational worker 
a)  20mSv   b) 50 mSv  c) 30 mSv   d) 1 mSv
 
Answer: b) 50 msv
Explanation: As per ICRP and AERB guidelines, the annual dose limit for radiation workers is 50 mSv.
 
Que9: Dose limit for pregnant women after confirming the pregnancy.
a) 10mSv     b) 2mSv    c) 20 mSv d) 30 mSv
 
Answer: b) 2 mSv
Explanation: After pregnancy is confirmed, radiation exposure has to be kept below 2 mSv so as not to have any effect on fetal development.
 
Que10: SI unit of exposure 
a) Coulomb/Kg     b) J/kg    c) kJ / Kg    d) m Coulomb /Kg
 
Answer: a) Coulomb/kg
Explanation: The unit of radiation exposure in the SI system is coulomb per kg (c/kg).
 
Que11: After beta decay, atomic number 
a) atomic number increased by one
b) atomic number decreased by one
c) atomic number no change 
d) atomic number increased by two
 
Answer: a) Atomic number increased by one
Explanation: During beta decay, a neutron is converted into a proton, which increases the atomic number by 1.
 
Que12: Which source was used for detecting the paper?
a) Gamma   b) Beta   c) Alpha   d) neutron
Answer: b) Beta radiation
Explanation: The penetrative level of beta particles is perfect for measuring the thickness of paper.
 
Que13: Emergency preparedness comes under which rule?
a) Rule no 19; b) Rule no 20; c) Rule no 35; d) Rule no 33
 
Answer: c) Rule No. 35
Explanation: Rule 35 is related to emergency preparedness and response.
 
Que14: What is the gamma energy of Am 241?
a) Gamma is 0.06 Mev; b) Gamma is 0.06 Kev   
c) Gamma is 600 Mev; d) Gamma is 1.33 Mev
Answer: a) 0.06 MeV
Explanation: Americium-241 has a primary gamma energy of 0.06 MeV, which gives it industrial and medical applications.
 
Que15: Occupational work maximum working range?
a) including planet radiation with described radiation
b) excluding the planet radiation with described radiation
c) Both a & b
 
Answer: b) Excluding the planet radiation with described radiation.
Explanation: Occupational radiation exposure is calculated by excluding natural background radiation.
 
Que16: In Crompton scattering, the photon will act with which electron.
a) excited electron   b) nucleolus    c) Free electrons   d) all of above
 
Answer: c) Free electron
Explanation: Compton scattering occurs when a photon interacts with a free electron and transfers energy.
 
Que17: Transport index for the source, which is 1 mtt from the package reading 
4 mR/h.
a) Yellow 3     b) Yellow 2     c) white    d) Yellow-White
Answer: a) Yellow 3
Explanation: The Yellow-III category for radiation transport occurs when the dose rate is >2 mR/h at 1 m distance.
 
Que18: Which gamma source is used for measurement of soil density?
a) Am241     b) Co 60     c) Kr 85    d) all of above
 
Answer: a) Am-241
Explanation: Am-241 is used for soil density gauges because its energy level is suitable for this application.
 
Que19: If distance from the source increases by 3 times, Exposure will
a) Increase by 3 times
b) Decrease by 3 times
c) Decrease by 9 times
d) increase by 9 times
 
Answer: c) Decrease by 9 times
Explanation: According to the inverse square law:
inverse law
 
Que20: The planet exposer rate?
a) 2.4 mSv; b) 2.4 Sv  c) 24mSv    d)240 mSv
 
Answer: a) 2.4 mSv
Explanation: The average global natural background radiation is about 2.4 mSv per year.
 

Note:

2 thoughts on “Radiation Safety Officer (RSO) Exam: Top Questions & Answers – Part 1”

  1. Pingback: Top 20 RSO Question And Answer|| RSO Exam Question || Part-2

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top