IRRSP Practice Test
Zero.957 R/hr - ANS-The radiation intensity at 1 foot from an Iridium-192 supply is 598 R/hr.
What is the radiation intensity at 25 feet from this supply?
A. Zero.957 R/hr
b. Zero.010 R/hr
c. 23.Ninety R/hr
d. 5.980 R/hr
100 keV - ANS-When running an x-ray machine at three hundred kVp, what is the common
electricity of x-rays produced?
A. 900 keV
b. Three hundred keV
c. 100 keV
d. 1.3 meV
a hundred mR/hr - ANS-The "High Radiation Area" boundary is mounted wherein the exposure
may want to exceed:
a. 500 mR/hr
b. A hundred mR/hr
c. 5 mR/hr
d. 2 mR/hr
127 ft - ANS-Using a 50 Curie Iridium-192 supply and a three HVL collimator, what is the
distance a radiographer must vicinity the Restricted location boundary?
A. 19 toes
b. 127 feet
c. 222 feet
d. Eighty one feet
1480 GBq - ANS-A forty Curie Iridium-192 source is about equal to:
(1 Ci = 37 Gbq)
a. 1480 GBq
b. 10 GBq
c. 2 GBq
d. 10,480 GBq
sixteen - ANS-The use of four 1/2 value layers of defensive will reduce an intensity by using a
issue of:
a. Four
b. Eight
, c. Sixteen
d. 32
189.1 feet - ANS-An Iridium-192 supply that changed into in the beginning a hundred and ten
Curies has decayed for 222 days. At what distance from the supply ought to a radiographer
vicinity the "Restricted Area" boundary?
A. 189.1 feet
b. 411.1 feet
c. 119.6 toes
d. 534.8 feet
2 mR/hr, one hundred mR/yr - ANS-The "Restricted Area" boundary is set up where the publicity
ought to exceed:
a. 5 mR/hr, 500 mR/yr
b. 2 mR/hr, 100 mR/12 months
c. 2 mR/hr, 100 mR in 7 consecutive days, 500 mR/hr
d. 100 mR/12 months
2.31 R/hr - ANS-The radiation depth at 1 foot from an Iridium-192 source is 452.4 R/hr. What is
the radiation depth at 14 feet?
A. 2.31 R/hr
b. 226.2 R/hr
c. 113.1 R/hr
d. 32.3 R/hr
three months - ANS-Formal inspection and protection of radiographic exposure devices and
associated equipment have to be done each:
a. 1 month
b. Three months
c. 6 months
d. One year
3.125 Curies - ANS-A 50 Curie Cobalt-60 source has decayed 4 half of lives. What is the last
interest?
A. 6.25 Curies
b. Three.One hundred twenty five Curies
c. Zero.195 Curies
d. 1.Fifty six Curies
3/four - ANS-A zero.Four hundred inch piece of lead defensive will reduce the radiation depth
from an Iridium-192 supply by means of:
a. Three/4
b. Half
c. 1/four
Zero.957 R/hr - ANS-The radiation intensity at 1 foot from an Iridium-192 supply is 598 R/hr.
What is the radiation intensity at 25 feet from this supply?
A. Zero.957 R/hr
b. Zero.010 R/hr
c. 23.Ninety R/hr
d. 5.980 R/hr
100 keV - ANS-When running an x-ray machine at three hundred kVp, what is the common
electricity of x-rays produced?
A. 900 keV
b. Three hundred keV
c. 100 keV
d. 1.3 meV
a hundred mR/hr - ANS-The "High Radiation Area" boundary is mounted wherein the exposure
may want to exceed:
a. 500 mR/hr
b. A hundred mR/hr
c. 5 mR/hr
d. 2 mR/hr
127 ft - ANS-Using a 50 Curie Iridium-192 supply and a three HVL collimator, what is the
distance a radiographer must vicinity the Restricted location boundary?
A. 19 toes
b. 127 feet
c. 222 feet
d. Eighty one feet
1480 GBq - ANS-A forty Curie Iridium-192 source is about equal to:
(1 Ci = 37 Gbq)
a. 1480 GBq
b. 10 GBq
c. 2 GBq
d. 10,480 GBq
sixteen - ANS-The use of four 1/2 value layers of defensive will reduce an intensity by using a
issue of:
a. Four
b. Eight
, c. Sixteen
d. 32
189.1 feet - ANS-An Iridium-192 supply that changed into in the beginning a hundred and ten
Curies has decayed for 222 days. At what distance from the supply ought to a radiographer
vicinity the "Restricted Area" boundary?
A. 189.1 feet
b. 411.1 feet
c. 119.6 toes
d. 534.8 feet
2 mR/hr, one hundred mR/yr - ANS-The "Restricted Area" boundary is set up where the publicity
ought to exceed:
a. 5 mR/hr, 500 mR/yr
b. 2 mR/hr, 100 mR/12 months
c. 2 mR/hr, 100 mR in 7 consecutive days, 500 mR/hr
d. 100 mR/12 months
2.31 R/hr - ANS-The radiation depth at 1 foot from an Iridium-192 source is 452.4 R/hr. What is
the radiation depth at 14 feet?
A. 2.31 R/hr
b. 226.2 R/hr
c. 113.1 R/hr
d. 32.3 R/hr
three months - ANS-Formal inspection and protection of radiographic exposure devices and
associated equipment have to be done each:
a. 1 month
b. Three months
c. 6 months
d. One year
3.125 Curies - ANS-A 50 Curie Cobalt-60 source has decayed 4 half of lives. What is the last
interest?
A. 6.25 Curies
b. Three.One hundred twenty five Curies
c. Zero.195 Curies
d. 1.Fifty six Curies
3/four - ANS-A zero.Four hundred inch piece of lead defensive will reduce the radiation depth
from an Iridium-192 supply by means of:
a. Three/4
b. Half
c. 1/four
