Sources

Question 1

Half life of Iridium 192 is …….

Answer 1

74 Days

Question 2

Iridium 192 has 192 of What ?

Answer 2

Equal amount of Protons and Neutrons in the Nucleus

Question 3

Which of the following would provide the smallest value of film Unsharpness ?

A-20 MeV X-rays , Lead screens , ultrafine grain film .
B-COBOLT 60 gamma rays, lead screens , ultra fine grain film.
C- Iridium 192 gamma rays, lead screens , ultra fine grain film.
D- Selenium 75 , gamma rays , lead screens , ultra fine grain film

Answer 3

D- Selenium 75 gamma rays, lead screens , ultra fine grain film

Question 4

Which of the following presents the greatest hazard from Gamma radiation?

A- 10 Curries of COBOLT 60
B- 10 Curries of Iridium 192
C- 10 Curries of ytterbium 169
D- all of the above

Answer 4

A-10 curries of COBOLT 60

Question 5

In the unsealed condition all common sources of gamma rays for industrial radiography all emit:

A - gamma rays and beta particles.
B - gamma rays and alpha particles
C - either a or b
D - gamma rays , alpha particles and beta particles .

Answer 5

A - Gamma rays and beta Particles

Question 6

The Pye of radiation that presents the greatest hazard to human health is ?

A- X Rays
B- Gamma rays
C- beta Particles
D- alpha particles

Answer 6

D- Alpha particles