I

Question 1

Instruments
are classified into three categories relative to the function
they perform, namely

Answer 1

survey meters, laboratory counters
and personnel dosimeters

Question 2

■ Geiger-Mueller (GM) instruments
■ Ionization chamber instruments
■ Scintilation instruments

Answer 2

Survey meters

Question 3

■ Photographic film dosimeters
■ Thermoluminescent dosimeters
■ Pocket dosimeters

Answer 3

Personnel dosimeters

Question 4

Level of radioactive
contamination
Radiation dose rate in area

Answer 4

Survey Meters

Question 5

Identity and quantity of
radioactive material

Answer 5

Laboratory Counters

Question 6

Accumulated dose to
individuals in area

Answer 6

Personal Dosimeters

Question 7

Many radiation safety decisions - such as
the need for decontamination, shielding, personnel monitoring, change in work
procedures, etc. - are based on radiological survey results using

Answer 7

survey meters

Question 8

The most common type of instrument is a

Answer 8

gas filled radiation detector

Question 9

Two most common types of gas filled detectors

Answer 9

1. Geiger-Muller or GM detector
2. ion chamber

Question 10

used to measure very small amounts of radiation

Answer 10

Geiger-Muller or GM detector

Question 11

used for measuring large amounts of radiation

Answer 11

ion chamber

Question 12

is a low range instrument for estimating gamma ray
exposure rates and detecting the presence of most beta radiation

Answer 12

GM survey meter

Question 13

is used for determining background radiation levels, and for
detecting and measuring radionuclide contamination

Answer 13

GM survey meter

Question 14

If the measurement is for contamination, the appropriate unit is

Answer 14

cpm (or
some multiple)

Question 15

if the measurement is for dose rate, the appropriate unit is

Answer 15

mR/hr (mSv)

Question 16

is
used for determination of
radioactivity, usually expressed
in dpm, from wipe test and leak
tests

Answer 16

sodium iodide well counter

Question 17

may be
used to accurately quantify very
small amounts of radioactivity

Answer 17

well counter

Question 18

is an
ionization chamber
that allows assay of
gamma emitters.

Answer 18

radionuclide dose
calibrator

Question 19

are suitable for measuring
radiation exposure rate or cumulative radiation
exposure at high radiation intensities. They are
not especially useful at low radiation intensities
or for detecting small quantities of radioactive
material.

Answer 19

Ionization chambers

Question 20

second most common type of radiation detecting
instrument is the

Answer 20

scintillation detector

Question 21

most common type of material in scintillation detector

Answer 21

sodium iodide

Question 22

The first part of the photomultiplier tube is made of another special
material called a

Answer 22

photocathode

Question 23

is sensitive to ionizing radiation, and when it is used as a
monitor, the amount of film darkening is a measurement of radiation
exposure

Answer 23

Photographic film

Question 24

The filmstrip and holder constitute the film monitor, called a

Answer 24

film
badge

Question 25

• A small semiconductor material called a ________ may also be used to monitor radiation exposure. When radiation interacts with a TLD, the energy is stored in the material. When heated, the energy is released as light, and the amount of light is proportional to the amount of energy stored

Answer 25

thermoluminescent dosimeter (TLD)

Question 26

The TLD most commonly used for monitoring is _______, usually found as chips that are about 1/2 cm2

Answer 26

lithium fluoride

Question 27

chambers are designed to measure the ionization events within an air filled chamber

Answer 27

Pocket ionization

Question 28

Determination of contamination level often most important measurement in medical emergency setting Usually done with GM probe called

Answer 28

pancake detector

Question 29

Instruments to measure accumulated dose commonly referred to as dosimeters, worn by person to measure accumulated individual dose. Two types normally used: direct read-out devices _____ and indirect _____

Answer 29

(pocket dosimeters) & TLDs & film badges