1. Which of the following may cause a malfunction of a radiation monitoring device? 1. Power failure
3. Merer failure
2. Damage to the probe
C. 2 & 3 only D. 1. 2. & 3
A. 1 & 2 only B. 1 & 3 only
2. The principal active component of a thermoluminescent dosimeter is a special crystal called: A. Silver Bromide B. Sodium iodide
8:148
C. uthium fluoride D. Calcium tungstate
3. The location of a lost radioactive source is most easily accomplished by using a:
A. Survey Meter B. Pocket dosimeter
8:406
C. Densitometer D. Scintillation counter
4. When film badges are employed for radiation monitoring. which of the following factors may effect the reading of the badge? 17:89 1. Exposure to excessive heat 2. Submersion of the badge in flUids 3. Damage to the film wrapper
A. 1 & 2 only 1 & 3 only
C.
B.
D.
2 & 3 only L 2. & 3
5. The roentgen is a unit of measurement that specifies the A. Excitation B. Ionization
oi air by x·rays or gamma rays.
C. Absorption D. Attenuation
8:88
6. A Geiger-Muller Counter will often indicate inaccurate exposure rate when measuring for:
1. Pulsed x-ray beams A. B.
2
Continuous x-ray sources
1 only 2 only
C. D
3
8:406
Contained gamma sources
3 only 1.~.
& 3
7.. T he most sensitive deVice for the detection of gamma radiation is a special type of radiation deVice called a/an: A. Scintillation counter B. Ionization chamber
C. Film badge D. Pocket dosimeter
4:565
8. The amount of x-ray or gamma exposure resulting in the production of 2.58x10-4 coulombs in 1 Kg of air defines the: 8:88 A. Rad B. Seivert
C. Becquerel D. Roentgen
9. If the absorbed dose of 1 cGy of fast neutrons has the same biological effect as 10 cGy of 2 MeV photons. the RBE of these neutrons is 7: 156
. A. 1 B. 10 Chapter 4
C. 100 D.
22
Unable to determine
...
Detection and Measurement of Radiation
17:88
10, Which of the following is nol a basic component of a film badge? C.
A. Plastic holder B. Various melal Iilters
D,
Light-light pocket Self-reading meter
11. A patient is exposed to 70 rads of alpha having a quality factor (QF) of 20. This person's dose equivalency is: 17:50
C.
A. 14 rem B. 70 rem
D.
1400 rem 2800 rem
12. The ionization produced in a gas· filled cavity placed in a medium, is related surrounding medium by the:
C.
A. Chamber volume theory B. I\bsorupd dosp
D.
the energy ,absorbed in the 8: 128
10
Bragg-Gray theory Conversion factor
13. Which type of radiation detection devices are most desirable for cumulative radiallon monitoring' 8:410
2. 11.D's
1. GM counters 1\. B.
3. Film badges
1 & 2 only
C.
2 & 3 only
1 & 3 only
D.
I, 2. & 3 only
14, The primary difference belween a Geiger-Muller detector and cutie pie detector is: A. Basic operating princi pie
C. Method of detection
B. Method of display
D.
Operating potenlial
15. Because of environmental faclors. the manufacturers recommend oflilne Ihat the him badge may be worn for personnel monitoring,
A. Two weeks
C
B. 01lE' monl II
LJ
16, The principal difft"rPllcP bplween
1I
01 a
as the maximum period 7:584
3 months 6 ilion I lis 8:91
free air ionization lind a Ihimblp chl\mber is the
A, Design 01 the chamber B. Range of ellPlqws drlrcled
] 7. The rale of dec
Barometrzc pressure
A. 1 & 2 only B. 1 & 3 only
3. Reiarrue humidIty
C.
2 & 3 only
D
1. 2. & 3
50. The calibration 0' an 100l:allon type meter can be made by a companson with
21/
an
radiation source. A. High intensity
C. D.
B. Short-lived
17:83
Long-lived Alpha emittmg
51. The primary reference medIum 'or the measurement and calculation of absorbed dose IS: A. Air
C
Lucile
B. Water
D
Polystvrene
8: 141
52. The degree to which radlataon can cause a chemical change can be used as a measure of absorbed dose. An example of thiS type dOSimeter is a 8: 146
0'
A. Friche dosimeter
C
Pocket dOSimeter
·B. Thermoluminescent doSimeter
D
Film dOSimeter
... Chapter 4
26
DetectIon and Measurement
0'
Radiation
53. The kinetic energy of charged ionizing particles liberated per unit mass in a specllic material by uncharged particles Is khown as the: 21 :48 A. KE factor o. KP factor
C. Kenna D. Gray
54. In order to properly CCllibrate ionizatioll chambers, temperature and pressure are standardized to levels of:
A. 0" C - 760 mmljg B. 37"C - 670 mml-lg
8:96
C. 68°C - 76 mmHg D. 68°C - 760 rnrnHg
55. The principal advantage 01 scintillation-type detectors compared to an ionization-type chamber is: 8: 120 1. Hlgller counting late 2. ·A siloTler resolving time 3. The recording 0/ fI broad energl.) spectrum
