RNI MID-COURSE EXAM 2024

1. An isotope of an element has the same number of __________ , but a different number of ___________ .

• Protons, electrons
• Electrons, neutrons
• Protons, neutrons
• Neutrons, protons

2. A radioactive nuclide has a /an _________ stable nucleus than a non - radioactive nucleus of the same element.

• more
• less
• identical
• small

3. _____________ is the process by which unstable atoms emit radiation until they become stable.

• Radiation
• Radioactive Decay
• Chemical Reaction
• Isotopic Transition

4. An example of a naturally occurring radionuclide is

• Carbon-14
• Xenon-133
• Iodine-123
• Molybdenum-99

5. The most - commonly used radionuclide is

• Iodine-131
• Technetium-99m
• Molybdenum-99
• Xenon-133

6. An ideal radiopharmaceutical would have all the following characteristics except

• High target to non-target ratio
• No particulate emissions
• Long half-life
• Exhibit no toxicity

7. The first gamma camera is also known by which of the following names?

• Hal camera
• Muller camera
• West camera
• Anger camera

8. The ideal diagnostic radiopharmaceutical has an effective half-life of

• 1 day
• 1.5 times the biological half-life
• 6 hours
• 1.5 times the duration of the test

9. Which of the following is the first object that an emitted gamma photon encounters after exiting the body?

• Collimator
• Detector crystal
• Photomultiplier tubes
• Position logic circuit

10. When energy of an absorbed gamma photon is released, a flash of light is produced. This is similar to which of the following effects?

• Compton effect
• Photoelectric effect
• Pair production
• Collision effect