CLO 4 Radiation protection

A 'passive' personal dose meter such as a film badge or 'TLD' will:

• Flash or alarm when the dose limit has been exceeded.

• Measure the dose you receive

• Help protect you from the radiation and reduce the dose you receive

• Absorb the radiation and become radioactive

You are concerned about the radiation levels around an x-ray set. What should you do?

• Place it in a lead box

• Make a radiation measurement

• If it is safe to do so, turn the x-ray set off

• Put a barrier around the area and mark with a warning sign

Who is responsible for ensuring adequate provision for the radiation safety of employees?

• The Employer

• A Radiation Protection Adviser

• A Radiation Protection Supervisor

• The Health and Safety Executive

If, during an accident at work, someone receives a radiation exposure of 100 milli Sieverts, what effect will this have on his/her health?

• None at all

• He will die in a few weeks

• His hair will fall out

• No effect will be observed immediately but he will have a slightly greater risk of contracting cancer later in life

Which unit describes a person's dose resulting from his exposure to radiation ?

• Gray, Gy

• Sievert, Sv

• Becquerel, Bq

• Rad

High radiation doses are rare, and usually only occur following accidents. Which of these injuries can be caused by high exposures to radiation?

• Vomiting

• Hair loss

• Reddening of the skin

• All of these answers

Which unit describes how radioactive a radiation source is?

• Becquerel, Bq

• Rad

• Gray, Gy

• Sievert, Sv

The annual dose limit for the whole body of an adult (over 18) at work is:

• 15 mSv

• 6 mSv

• 20 mSv

• 50 mSv

Which of these radiations will be completely stopped by a piece of paper?

• Gamma radiation

• Neutrons

• X-rays

• Alpha radiation

Who of the following may enter a Controlled Area?

• Anyone who wears a personal dosimeter

• Any person carrying a dose rate monitor

• Any Radiation Protection Supervisor

• Persons working under written arrangements or any classified person