5.3 Radiation

Written by Imran Qureshi (NEBOSH)

NEBOSH IGC · Workplace hazards · 15 questions

Name: ____________________ Date: ____________

Which of these is ionising radiation?
- A X-rays
- B Visible light
- C Microwaves
- D Radio waves
Basic ways to limit exposure to ionising radiation are:
- A Heat, light and sound
- B Time, distance and shielding
- C PPE only
- D Noise, vibration and dust
Radon is a:
- A Naturally occurring radioactive gas
- B Non-ionising source
- C Visible dust
- D Type of laser
Which of these is non-ionising radiation?
- A Gamma rays
- B X-rays
- C Ultraviolet light
- D Alpha particles
Which is the main health effect of ultraviolet light on skin?
- A Burns and skin cancer
- B Dermatitis from cement
- C Lung scarring
- D Hearing loss
Infrared radiation mainly causes:
- A Heat burns
- B Hearing loss
- C Genetic damage
- D Radiation sickness
Lasers can cause:
- A Ear damage
- B Skin sensitisation only
- C Hearing loss
- D Eye damage
Welding arcs are a source of:
- A Alpha radiation only
- B Radon only
- C Neutrons only
- D Ultraviolet and visible radiation
Ionising radiation includes:
- A Visible light
- B Radio waves
- C Microwaves
- D Alpha, beta and gamma rays and neutrons
Radon gas comes from:
- A Welding
- B Burning wood
- C The ground and can build up in buildings
- D Cleaning products
In controlling ionising radiation, distance means:
- A Staying as far away from the source as possible
- B Using a thinner barrier
- C Increasing the time near the source
- D Moving closer to measure
Shielding in radiation protection is:
- A A warning sign
- B A barrier between the person and the source
- C A first aid kit
- D A longer shift
Which of these is a control for ionising radiation sources?
- A Allowing anyone to use them
- B Keeping sources locked, labelled and in restricted areas
- C Keeping them unlabelled
- D Leaving them in an open area
A dose badge is used to:
- A Block ultraviolet light
- B Cool the skin
- C Protect from radiation
- D Monitor the radiation dose a worker receives
Who advises on and oversees a radiation protection strategy?
- A A competent person such as a radiation protection adviser
- B The customer
- C Any visitor
- D The cleaner

Answer key

1. A, 2. B, 3. A, 4. C, 5. A, 6. A, 7. D, 8. D, 9. D, 10. C, 11. A, 12. B, 13. B, 14. D, 15. A

X-rays are ionising.
Reduce time, increase distance and shield.
Radon comes from the ground.
Non-ionising radiation has less energy and does not break up atoms.
Outdoor workers face UV from sunlight.
It is felt as heat.
The beam can damage the retina.
Arc welding gives off UV and intense light.
It has enough energy to break up atoms.
It is a naturally occurring radioactive gas.
Time, distance and shielding.
Lead or concrete may be used.
Access to controlled areas is restricted.
Monitoring and health surveillance are used for classified workers.
Competent advice is needed.