Paper 3 Gamma Radiation

What is one of the safety precautions that must be taken when working with a radioactive source?

• Increase the time of exposure

• Limit the time of exposure

• Handle the source with bare hands

• Keep the source close to the body

Why should warning signs be displayed when a radioactive source is in use?

• To decorate the area

• To inform people that a radioactive source is in use

• To increase the exposure time

• To make the area look important

How should a radioactive source be handled to ensure safety?

• With bare hands

• Using short-handled tools

• Using long-handled tongs

• Without any tools

What is the recommended distance to keep from a radioactive source at all times?

• Close to the body

• An arm's length away

• Two feet away

• No specific distance

How should a radioactive source be handled safely?

• With bare hands

• Using short-handled tongs

• Using long-handled tongs and keeping your torso at least an arm's length away

• By wearing thick gloves

How should a radioactive source be stored safely?

• In a sealed lead-lined container with a hazard symbol visible on the container and at the storage location.

• In a plastic container with a hazard symbol visible only on the container.

• In a glass container with no hazard symbol.

• In an open container with a hazard symbol visible only at the storage location.

What does the inverse square law of radiation state?

• The intensity of radiation is directly proportional to the distance from the source.

• The intensity of radiation is inversely proportional to the distance from the source.

• The intensity of radiation is directly proportional to the square of the distance from the source.

• The intensity of radiation is inversely proportional to the square of the distance from the source.

According to the inverse square law of radiation, what happens to the intensity of radiation if the distance from the source is doubled?

• The intensity doubles.

• The intensity remains the same.

• The intensity quarters.

• The intensity halves.

What device can be used to measure a radioactive count rate?

• Geiger-Müller tube

• Voltmeter

• Ammeter

• Thermometer

What device can be used to measure a radioactive count rate?

• A. A Geiger Counter or Geiger-Muller Tube connected to a scaler

• B. A Thermometer

• C. A Barometer

• D. A Voltmeter