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IRRSP TEST QUESTIONS AND ANSWERS
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IRRSP TEST QUESTIONS AND ANSWERS
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IRRSP TEST QUESTIONS AND ANSWERSHigh speed electrons are introduced from the cathode and strike the anode within a
vacuum sealed envelope - Answers-X-radiation is produced when a supply of
particulate and electromagnetic - Answers-What are the two basic types of ionizing
radiation?
at the speed of light without regard to pressure, temperature or magnetic fields -
Answers-Wavelike radiation travels at?
186000 miles/s (299338 km/s) - Answers-Gamma rays travel in a wavelike motion at the
speed of light, which is?
True - Answers-Matter can be turned into energy.
two protons two neutrons - Answers-Alpha particles are much like a helium nucleus as
they have?
positive charge - Answers-Alpha particles have a/an?
negative charge - Answers-Beta particles have a/an?
Beta particles have a mass - Answers-much less than that of an alpha particle.
they travel at sub-light speeds and as such are easily contained or shielded - Answers-
In modern radiography the alpha and beta particles are of little concern because?
high-voltage direct current across the cathode of a vacuum tube - Answers-X-radiation
is created by applying a?
X-rays are produced by an X-ray tube by the - Answers-passage of electrons across the
tube striking the target
nonionizing radiation - Answers-Radio waves, microwaves and infrared light are types
of?
1 AMU - Answers-The neutron has an atomic mass of?
0.2 in. (5.08 mm) - Answers-When using lead to shield an Ir-192 source, you would
need __________ to reduce the original exposure to one half
66.7 mR - Answers-Standing in a 100 mR/h field, the radiographer will make 4 ten
minute exposures. The radiographer's total exposure for the day would be _______.
, 156 R/h - Answers-With 30 Ci at one foot, what would your exposure rate be at one foot
from the source
255.5 R - Answers-If you have 73 Ci of Co-60, your exposure rate at two feet from the
source would be __________
4 times - Answers-You have an intensity of 50 mR/h at 100 feet from the source.
moving to 50 feet would increase your exposure rate by a factor of ____________
4 - Answers-There are _________ types of installations used in radiography.
open - Answers-The most common type of installation used in field radiography is
___________
shielding, time, distance - Answers-There basically three methods of protection from
ionizing radiation. What are they?
multiply the survey meters reading by the total exposure time - Answers-To determine
the total dose received, _______
multiply the rate of dose by the total time exposed - Answers-To determine the total
dose received, _______
multiply exposure time by exposure rate - Answers-To determine the total dose
received, _______
60 mR/h - Answers-At a dose rate of 60 mR/h, one hour of exposure would be
___________
14 R/Ci at one foot - Answers-The specific gamma ray constant for Co-60 can be
expressed as _____________
5.2 R/h/Ci at one foot - Answers-The specific gamma ray constant for Ir- 192 can be
expressed as _____________
does rate per curie at a specific distance - Answers-A specific gamma ray constant can
be stated as ___________
The intensity is indirectly proportional to the distance squared - Answers-The inverse
square law is written as
1 half-value layer - Answers-Shielding can be expressed by the amount of shielding
provided, so that the amount of shielding that would reduce the original exposure rate to
one-half would be stated as
lead - Answers-The best material to use as shielding would be
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