Chapter 31 Sample Multiple Choice Problems

University:
California State University, Northridge
Course:
PHYS 100A | General Physics I
Academic year:

2024
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370

Pages:

3
Author:

Cerasticodg5

Chapter 31 Sample Multiple Choice Problems 1. When lead-207 (Z = 82) is bombarded with neutrons, it can change into a. lead-208 b. lead-206 c. tellurium-208 (Z = 81) d. bismuth-208 (Z = 83) 2. Complete the following nuclear reaction: O + 4He -> _____ + 19Ne 16 8 2 a. b. c. d. 10 p n 2 H 3 H 1 1 3. When a target nucleus is bombarded by an appropriate beam of particles, it is possible to produce a. a less massive nucleus, but not a more massive one. b. a more massive nucleus, but not a less massive one. c. a nucleus with smaller atomic number, but not one with a greater atomic number. d. a nucleus with greater atomic number, but not one with a smaller atomic number. e. a nucleus with either greater or smaller atomic number. 4. What is the Q-value of the folllowing reaction? 4 N + He = 1p + 17O (14.003074) (4.002603) (1.007825) (16.999131) a. 1.191 MeV b. -1.191 MeV c. 1.279X10-3 MeV d. -1.279X10-3 MeV 14 5. What is the energy released (positive) or absorbed (negative) in the following reaction? 3 H + H = 4He + 2(1n) (3.016049) (3.016049) (4.002603) (1.008665) a. 0.0122 MeV b. -0.0122 MeV c. 11.3 MeV d. -11.3 MeV 3 6. What is the mass of the products of a nuclear fission reaction compared to the mass of the original products? a. greater b. less c. the same d. varies according to the reaction 7. What is the mass of the products of a nuclear fusion reaction compared to the original elements? a. greater b. less c. the same d. varies according to the reaction 8. The fuel for nuclear fusion in the center of the Sun is a. H b. He c. U d. any radioactive material 9. The fuel for nuclear fission is a. H b. He c. U d. any radioactive material 10. In the fission reaction 235U + 1n -> 141Ba + 92Kr + neutrons, the number of neutrons produced is a. zero. Note: The atomic numbers of b. 1. U, Ba, and Kr are c. 2. 92, 56, and 36, d. 3. respectively. 11. What is the meaning of the term "critical mass"? a. This refers to the mass of the "critical" elements in a reactor, i.e., the uranium or plutonium. b. This refers to the minimum amount of fissionable material required to sustain a chain reaction. c. This is the amount of mass needed to make a power reactor economically feasible. d. This is the material which is just on the verge of becoming radioactive. 12. All of the following are units used to describe radiation dosage in humans except a. curie. b. rad. c. rem. d. RBE. e. sievert. 13. A unit that measures the effective dose of radiation in a human is the a. curie. b. RBE. c. rad. d. rem. 14. The chief hazard of radiation is a. damage to living cells due to ionization. b. damage to cells due to heating. c. damage to living cells due to the creation of chemical impurities. d. the creation of new isotopes within the body. 15. An X-ray technician takes an avearge of ten X-rays per day and receives 2.5 mrad per X-ray. What is the total dose the technician receives in 250 working days? a. 2.50 rem b. 5.00 rem c. 6.25 rem d. 7.75 rem Answers: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. a b e b c b b a c d b a d a c