Training Course on Radiation Protection and Safety Principles - 2014
Time Allowed: 45 minutes
Total marks: 100 (3 marks each for 28 questions and 16 marks for Question No. 29)
Full Name & Organization:_________________________________________________________________________________
PART-I
PLEASE TICK ( √ ) THE CORRECT ANSWER
Q-1. The safety of radiation worker is the prime responsibility of the _______________
(a) Regulatory Body
(b) Operating Organization (Licensee)
(d) Government
(c) Worker
Q-2. The responsibility of operating organization is to provide ___________to workers
involved in radiography.
(a) Personal protective equipment
(b) Dosimetery
and
Health
surveillance
(d) All of them
(c) Radiation monitoring equipment
Q-3. Major
causes
of
radiation
emergencies
in
industrial
radiography
are___________________
(a) Failure to retract radiography (b) Source stuck in guide tube
source
(c) Source disconnection from camera (d) All of the above
cable
Q-4. A period of time in which half the nuclei of a species of radioactive substance would
decay is called____________
(a) Dead time
(b) Radioactive life
(d) End time
(c) Half- life
Q-5. By minimizing the time spent near source or generator (while operation) the exposure
and thus the risk of damage to human health can be _________
(a) Increased
(b) Decreased
(d) Prolonged
(c) Finished
Q-6. The greater the distance from source the __________ the absorbed dose.
(a) Greater
(b) Real
(d) Effective
(c) Lower
Q-7. The decaying product in beta decay has the same atomic mass “A” as that of the
parent but its atomic number “Z” is ………………. than that of the parent.
(a) One less
(b) One greater
(d) none of above
(c) Equal
Q-8. Stopping power is a function of the ……………………………………………..in which
the charge particle interacts.
(a) Charge of the particle
(b) Energy of the particle
(d) All of above
(c) Material
Q-9. If the Linear Energy Transformation (LET) value of radiation is more, the ………… it
will be dangerous.
(a) Less
(b) More
(d) None of above
(c) No
Q-10. Probability of photoelectric phenomena increased if the energy of the incident photon
is ………….
(a) Low
(b) Medium
(d) None of above
(c) High
Q-11. Film dosimeters (commonly known as film badges) consist of a piece of
…….………….. in a holder
(a) Small chip
(b) Crystal
(d) None of above
(c) Photographic film
Q-12. Nuclear Gauges may be used in the industry for the measurement of ………..
(a) Density
(b) Thickness
(d) All of above
(c) Level
Q-13. When seeds are irradiated, induced mutations take place in the irradiated seeds that
may be ……………mutation
(a) Negative
(b) Positive
(d) All of above
(c) No
Q-14. Gamma alarms or audible warning signals must be installed …………….. the
enclosure of fixed industrial radiography.
(a) Inside
(b) Outside
(d) None of above
(c) Both a & b
Q-15. Which one of the below is most appropriate for managing very short half-life
radioactive waste:
(a) Dilute and Disperse
(b) Delay and Decay
(d) Contain
(c) Concentrate
Q-16. The purpose of filtration in the X-ray tube is
(a) To absorb the high energy of X-rays (b) To absorb the electrons
(c) To protect the operators from (d) To absorb the low energy of X-rays
scattered radiation
Q-17. Which source below categorized as Category-I source:
(a) Ir-192
used
in
industrial (b) Cs-137 used in brachytherapy
radiography
(d) Co-60 used in tele-therapy
(c) Am-241Be used in well logging
Q-18. Everyone in the world is exposed to:
(a) natural sources of radiation
(b) artificial sources of radiation
(c) natural and artificial sources of (d) none of the above
radiation
Q-19. The principles of radiation protection include:
(a) Justification, Stopping the use of (b)
radiation sources, Optimization
(c) Justification, Optimization, Dose (d)
Limitation
Justification, Stopping the use of
radiation sources, Dose Limitation
Optimization, Stopping the use of
radiation sources, Dose Limitation
Q-20. Stochastic effects are effects for which:
(a) the severity of the effects is (b) the probability of the effects is
proportional to the dose
proportional to the dose with a
threshold
(c) the probability of the effect is (d) The severity of the effect is not
proportional to the dose without a
proportional to the dose
threshold
Q-21. Deterministic effects are effects for which:
(a) the severity of the effects is (b) the probability of the effects is
proportional to the dose
proportional to the dose
(c) the probability of the effect is (d) The severity of the effect is
proportional to the dose without a
proportional to the dose with a
threshold
definite threshold
Q-22. The activities of the Regulatory Authority include:
(a) Notification
(b) Authorization
(c) Inspection
(d) Enforcement
(e) Cooperation at national and international level
(f) Quality management
(g) All of the above
Q-23. For any practice it is required to classify working areas in order to control
occupational exposure into:
(a) Safe and unsafe working conditions (b) Controlled and supervised areas
(d) None of the above
(c) Radiation worker and public area
Q-24. Gamma sources are commonly used for industrial radiography. Why are they
suitable?
(a) Because they are robust and (b) Because they are harmless for
inexpensive
human
of
the
significant
(c) Because all the radiation is absorbed (d) Because
in the sample under investigation
penetrating power of gamma
radiation
Q-25. In emergencies the first action should be taken is:
(a) Putting the source in the shield
(b) Estimating the dose
(d) All of the above
(c) Saving life
Q-26. The activity of Ir-192 now is 1000 GBq . If the half live is 74 days, the activity after 222
days from now:
(a) 125 GBq
(b) 500 GBq
(d) 300 GBq
(c) 250 GBq
Q-27. What is the difference between X-rays and gamma rays:
(a) X-ray has more energy than gamma (b) X-ray is charged particle and
gamma is photon
(c) Gamma is emitted from nucleaus (d) X-ray is photon and gamma is
and X-ray is from orbital shell
charged particle
Q-28. Match the following practices with their respective radiation source categorization
(a) Gamma radiography
(i) Category 1
(ii) Category 2
(b) Radiotherapy facility
(iii) Category 3
(c) Moisture density gauges
Q-29. Put true (T) or false (F):
(i)
Cosmic radiation at the surface of the earth is excluded from regulatory
control.
(ii)
Registrant or licensees have primary responsibility for the protection of
workers.
(iii) The general purposes of radiation protection are to prevent deterministic
effects and limit the probability of stochastic effects.
(iv) The probability of stochastic health effects increases with age.
(v)
Radiological accidents potentially can happen only in Nuclear Power Plants.
(vi) Human errors typically cause more accidents than equipment failures in
radiotherapy.
(vii) Alpha particles have a shorter penetration than gamma rays.
(viii) The regulatory body is established by the government through legislation.