ASNT PACKAGE PRACTICE SOLUTION 2026
SOLVED ITEMS CONFIRMED A+
◉ A sealed source emits what?
a. alpha particles
b. beta particles
c. X-rays
d. gamma rays. Answer: d. gamma rays
◉ A cobalt source has decayed from its original activity after 3 half-
lives. Originally it was 88 Ci (3256 GBq). Its current activity is:
a. 44 Ci (1628 GBq)
b. 22 Ci (814 GBq)
c. 11 Ci (407 GBq)
d. 8 Ci (296 GBq). Answer: c. 11 Ci (407 GBq)
◉ A cobalt source of 73 Ci is exposed for a full 60 min. Assume a
14.0 R/Ci/h factor, shooting through a 3 half-value collimator. What
would the restricted area be on the cold or collimated side of the
collimator?
,a. 149 ft (45.42 m)
b. 162 ft (49.38 m)
c. 211 ft (64.31 m)
d. 253 ft (77.44m). Answer: d. 253 ft (77.44m)
◉ The ball on a source assembly that prevents the source from
exiting through the back of the camera is called:
a. stop ball
b. pigtail ball
c. safety stop ball
d. retraction inhibitor ball. Answer: a. stop ball
◉ Emission of gamma rays, alpha rays, and beta rays is considered
what?
a. characteristics of source decay
b. material is stable
c. material is unbalanced
d. leaking source. Answer: a. characteristics of source decay
,◉ To penetrate a thicker or denser material, you would need a
source with:
a. more curies
b. more activity
c. more energy (shorter wavelength)
d. less energy (longer wavelength). Answer: c. more energy (shorter
wavelength)
◉ An element's weight is the:
a. A number
b. Z number
c. atomic number
d. number of neutrons. Answer: a. A number
◉ An element is identified by the number of _______ in its nucleus.
a. electrons
b. protons
c. neutrons
d. photons. Answer: b. protons
, ◉ The first indication of an extremity radiation overexposure is:
a. reddening of the skin
b. hair loss
c. nausea
d. blisters. Answer: a. reddening of the skin
◉ Gamma radiation has a shorter wavelength than visible light,
therefore making it:
a. less penetrating
b. more penetrating
c. brighter
d. less stable. Answer: b. more penetrating
◉ A high radiation area is defined as "an area accessible to
individuals, in which they could receive..."
a. 2 mR/h (20 uSv/h)
b. 5 mR/h (50 uSv/h)
c. 50 mR/h (500 uSv/h)
SOLVED ITEMS CONFIRMED A+
◉ A sealed source emits what?
a. alpha particles
b. beta particles
c. X-rays
d. gamma rays. Answer: d. gamma rays
◉ A cobalt source has decayed from its original activity after 3 half-
lives. Originally it was 88 Ci (3256 GBq). Its current activity is:
a. 44 Ci (1628 GBq)
b. 22 Ci (814 GBq)
c. 11 Ci (407 GBq)
d. 8 Ci (296 GBq). Answer: c. 11 Ci (407 GBq)
◉ A cobalt source of 73 Ci is exposed for a full 60 min. Assume a
14.0 R/Ci/h factor, shooting through a 3 half-value collimator. What
would the restricted area be on the cold or collimated side of the
collimator?
,a. 149 ft (45.42 m)
b. 162 ft (49.38 m)
c. 211 ft (64.31 m)
d. 253 ft (77.44m). Answer: d. 253 ft (77.44m)
◉ The ball on a source assembly that prevents the source from
exiting through the back of the camera is called:
a. stop ball
b. pigtail ball
c. safety stop ball
d. retraction inhibitor ball. Answer: a. stop ball
◉ Emission of gamma rays, alpha rays, and beta rays is considered
what?
a. characteristics of source decay
b. material is stable
c. material is unbalanced
d. leaking source. Answer: a. characteristics of source decay
,◉ To penetrate a thicker or denser material, you would need a
source with:
a. more curies
b. more activity
c. more energy (shorter wavelength)
d. less energy (longer wavelength). Answer: c. more energy (shorter
wavelength)
◉ An element's weight is the:
a. A number
b. Z number
c. atomic number
d. number of neutrons. Answer: a. A number
◉ An element is identified by the number of _______ in its nucleus.
a. electrons
b. protons
c. neutrons
d. photons. Answer: b. protons
, ◉ The first indication of an extremity radiation overexposure is:
a. reddening of the skin
b. hair loss
c. nausea
d. blisters. Answer: a. reddening of the skin
◉ Gamma radiation has a shorter wavelength than visible light,
therefore making it:
a. less penetrating
b. more penetrating
c. brighter
d. less stable. Answer: b. more penetrating
◉ A high radiation area is defined as "an area accessible to
individuals, in which they could receive..."
a. 2 mR/h (20 uSv/h)
b. 5 mR/h (50 uSv/h)
c. 50 mR/h (500 uSv/h)
