Dosimetry 1 test 2 (1B) Exam Actual
Questions and Answers 2026
T / F Changes in the colors of some chemical compounds and the
radiation effects on photographic emulsions were reliable methods
of measuring dose in the early days of radiation therapy -
correct answer ✅false
What does SED stand for? -
correct answer ✅skin erythema dose
SED was used in what "era" in radiation therapy? -
correct answer ✅orthovoltage era
According to the text, the unit "R" was introduced in what year? -
correct answer ✅1937
T / F The term exposure is the same as saying ionizations in air. -
correct answer ✅true
What is "SI" short for? -
correct answer ✅Systems Internacionale d'Unites
, Dosimetry 1 test 2 (1B) Exam Actual
Questions and Answers 2026
If the ionization loss is compensated by the ionization gained, what
condition exists? -
correct answer ✅electronic equilibrium
Where might most of the countries free ionization chambers be
found? -
correct answer ✅NSL's
what does NSL stand for? -
correct answer ✅national standardizing laboratories
T / F Free air ion chambers are too delicate and bulky for routine
use. -
correct answer ✅true
Why is it called a thimble chamber? -
correct answer ✅bc its shape resembles a sewing thimble
A chamber is known to have "stem leakage" if it does what? -
correct answer ✅If it records ionization produced anywhere other
than its sensitive volume area
Questions and Answers 2026
T / F Changes in the colors of some chemical compounds and the
radiation effects on photographic emulsions were reliable methods
of measuring dose in the early days of radiation therapy -
correct answer ✅false
What does SED stand for? -
correct answer ✅skin erythema dose
SED was used in what "era" in radiation therapy? -
correct answer ✅orthovoltage era
According to the text, the unit "R" was introduced in what year? -
correct answer ✅1937
T / F The term exposure is the same as saying ionizations in air. -
correct answer ✅true
What is "SI" short for? -
correct answer ✅Systems Internacionale d'Unites
, Dosimetry 1 test 2 (1B) Exam Actual
Questions and Answers 2026
If the ionization loss is compensated by the ionization gained, what
condition exists? -
correct answer ✅electronic equilibrium
Where might most of the countries free ionization chambers be
found? -
correct answer ✅NSL's
what does NSL stand for? -
correct answer ✅national standardizing laboratories
T / F Free air ion chambers are too delicate and bulky for routine
use. -
correct answer ✅true
Why is it called a thimble chamber? -
correct answer ✅bc its shape resembles a sewing thimble
A chamber is known to have "stem leakage" if it does what? -
correct answer ✅If it records ionization produced anywhere other
than its sensitive volume area
