1) How are medical tracers put inside the body? a) The patient is cut open and a gamma source is inserted in the organ b) The patient swallows a chemical combined with a gamma source c) The patient swallows a chemical combined with an alpha source d) The patient is injected with an alpha source 2) What detector is used by a doctor to view the radiation emitted by a medical tracer from inside the patient's body? a) Photographic film b) A Geiger Counter c) A Gamma Camera d) A film badge 3) A medical tracer should have a short half life because.... a) the activity will be low b) The procedure doesn't take long c) It produces a clearer image d) The activity reduces to a safe level within a few hours 4) The medical procedure of using gamma radiation to destroy cancerous cells is called.... a) gamma radiography b) chemotherapy c) gamma radiotherapy d) irradiation 5) Food, in particular soft fruits, are often irradiated. This procedure..... (choose the correct statement) a) can make the food radioactive b) kills bacteria using gamma radiation c) alters the flavour so it tastes nicer d) kills bacteria using alpha radiation 6) gamma radiography is similar to taking an x-ray image. Which of the following is NOT a reason for its use in crack detection? a) The detector shows a higher reading if there is a crack b) The crack will reflect the gamma radiation and clearly show up c) The cracks are too small to be detected by eye d) It is a reliable method for detecting cracks in critical components like aircraft turbine blades 7) in thickness gauging ..... a) an alpha source and a detector are used b) an increase in thickness will increase the detector reading c) a short half life is needed d) a decrease in thickness will increase the detector reading 8) a gamma source may be used to check for leaks in pipes. Which of the following is a correct reason why? a) gamma can penetrate the ground so there is an increase in the detector reading immediately above where the leak is  b) alpha sources would be too dangerous c) gamma sources are weakly ionising d) gamma sources are inexpensive

Uses of Radioactivity Quiz

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