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1. A unit used to express the exposure an individual receives is the:
 Roentgen

2. Just as in an emergency resulting from a nuclear power accident, the three most
important ways of reducing the radiation exposure from fallout from a nuclear weapon
are:
Dose rate, distance, and shielding

3. Which of the following is an example of proper units for expressing exposure rate?
 R/hr

4. The key elements of emergency management are , Response, Recovery and,
Mitigation.
 Preparedness


5. Type B packages must be able to meet Type A requirements and also withstand the
effects of ______________________ conditions?
 Accident

6. Radiation that individuals are exposed to on a continuing basis which is considered
non life­threatening is also known as this kind of radiation?
Cosmic

7. The distinctive symbol used to identify radioactive materials is the:
 Tri­blade

8. Many smoke detectors contain:
 Americium­241

9. Just under half of man's exposure to external natural radiation comes from?
 Cosmic radiation

10. Everyone is exposed to radiation on a continuing basis from either or sources.
 Natural, man­made

11. In the United States, serious radiation exposures:
 Have not resulted from radiological transportation accidents due largely to the nature of the
material transported and the use of appropriate protective packaging


12. The majority of radioactive material shipments are made in this type of packaging.
 Type B

13. In every nuclear power plant that generates electricity, the following components
are present:
Heat source, turbine electricity generator, and pump


14. To determine the amount of radioactive material in a package of radioactive
materials, you would look at the:
 Label


15. If evacuation is required following a nuclear power plant accident, it is
recommended that individuals living anywhere closer than miles be evacuated.
2 to 3

16. Radiation received by the body over a short period is:
 Acute exposure

17. Control rods are used in a reactor core to:
Absorb free neutrons


18. The rem is a unit used to measure:
 Radiation dose in terms of the amount of the biological effect caused by the amount of energy
absorbed


19. A member of the public should give lifesaving first aid to injured victims of a
radiological transportation accident:
 Without delay out of concern for radiological hazards

20. A detonation of a nuclear explosive above 100,000 feet of altitude is called
______________.
A high­altitude burst

21. Cosmic radiation and radiation from terrestrial sources are examples of:
Natural background radiation

22. To prevent fuel damage, decay heat must be removed from the reactor core:
 After the reactor shuts down

23. The immediate destructive action of a nuclear explosion is caused by this.
 Shock


24. According to the "7:10 Rule of Thumb," if the exposure rate one hour after
detonation of a nuclear weapon is 500 R/hr, the exposure rate approximately 14 days
later (343 hours) will be approximately:
 0.5 R/hr

25. Nuclear power plant emergency plans are required to incorporate actions for which
of the following types of radiological hazards?
 Direct exposure to radiation from a plume of radioactive material

26. Cancerous tumor cells can be treated by high energy or
_____________________________.
Gamma rays, X­rays

27. In a, a major failure has occurred, but an immediate response by the public is not
needed.
Site Area Emergency

28. A nuclear explosion which releases energy equivalent to 7,000,000 tons of TNT:
 Is called a 7 megaton burst

29. By far, the radionuclide used in most nuclear medicine procedures is:
 Technicium­99m

30. Because of its low penetrating ability, the type of radiation which is usually only a
hazard when inhaled or ingested is:
Alpha radiation

31. Radioactive fallout makes the surface it comes into contact with radioactive. (True
or False?)
False

32. The two radionuclides which concentrate in seafood are:
Lead and polonium

33. The three factors which are important in protecting individuals from radiation are:
 Time, shielding, and distance

34. Radiological survey instruments:
 Are the most accurate and reliable means of determining exposure levels

35. A chain reaction results when a uranium atom is struck by a/an
______________released by a nearby Uranium atom undergoing fission.
 Neutron


36. The 7:10 Rule of Thumb:
Helps estimate future exposure levels

37. Unbroken radioactive material packages never have a surface radiation dose above
this level:
1,000 mR/hr

38. The three main barriers in a nuclear power plant to prevent release of fission
products are the fuel rods, the reactor vessel, and the ________________________.
 Containment building

39. The label required for radioactive material packages with a maximum dose rate of
200 mR/hr at the surface of the package is:
Radioactive Yellow ­II


40. Chronic exposures are:
 Amounts of radiation received over a very long period of time

41. A large modern nuclear power plant has approximately fuel assemblies in its core.
 200

42. An example of a man­made source of radiation is:
 Diagnostic radiation


43. The total energy released in a nuclear explosion, is the explosions:
 Energy yield

44. Most debris from a nuclear weapons test:
 Was pushed into the stratosphere

45. Radioactive decay is defined as:
The decrease in the amount of any radioactive material due to the spontaneous emission of
nuclear radiation from the nucleus


46. The label required for radioactive material packages in excess of 50 mr/hr but less
than 200 mr/hr is:
 Radioactive Yellow­ II


47. Nuclear explosions can be of times more powerful than the largest conventional
weapon.
 Millions

48. Radon dose comes primarily from its daughter products which are ?
 Inhaled

49. Nuclear medicine techniques work through the detection of this kind of radiation,
injected into the body by adding a radioisotope to a certain drug:
Gamma ­rays

50. In a pressurized water­ reactor the primary cooling water:
 Transfers its heat to the secondary cooling water in a steam generator


Please check below for the answers for the FEMA IS 5 Exam: 

FEMA IS 5 Answers