Level 1 - Radiography Questions

45 Questions  I  By Mbelousov on December 19, 2010
Level 1 Radiography test - 135+ multiple choice questions

  

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1.  "primary" radiation is considered to be any radiation that has not gone through a photolectric effect
A.
B.
2.  Reticulation resulting in a puckered or netlike film surface is probably caused by:
A.
B.
C.
D.
3.  Primary radiation which strikes a film holder or cassette through a thin portion of the specimen will cause scattering into the shadows of the adjacent thicker portions producing an effect called:
A.
B.
C.
D.
4.  The formula for determining permissible accumulated personnel dose is:
A.
B.
C.
D.
5.  A general rune often employed for determining the kilovoltage to be used when X-raying a part is:
A.
B.
C.
D.
6.  L1An advantage of radiography is that it reveals internal discontinuities with access to only one side of the part being inspected.
A.
B.
7.  As a check on the adequacy of the radiographic technique, it is customary to place a standard test piece on the source side of the specimen. This standard test piece is called a:
A.
B.
C.
D.
8.  Excessive exposure of film to light prior to development of the film will most likely result in:
A.
B.
C.
D.
9.  Frilling or loosening of the emulsion from the base of the film is most likely caused by:
A.
B.
C.
D.
10.  In a fluoroscopic inspection system using a 15-inch source-to-material distance and 2-inch material-to-screen distance, transverse vibration of which item will cause the most image blurring:
A.
B.
C.
D.
11.  When radiographing a part which contains a large crack, the crack will appear on the radiograph as:
A.
B.
C.
D.
12.  L3Scattered radiation and an excessive specimen-to-film distance will both cause a loss of definition.
A.
B.
13.  If a piece of lead 1/2-inch this is placed in the path of a beam of radiation emanating from cobalt-60, it will reduce the dose rate at a given location by:
A.
B.
C.
D.
14.  An excellent radiograph is obtained under given conditions of exposure with the film located at a distance of 36 inches from the target of the X-ray tube. If the film is now placed only 18 inches from the target, and all exposure conditions except time are held constant, the new exposure time will be:
A.
B.
C.
D.
15.  The reason a "shim" is used in radiographic setup is to:
A.
B.
C.
D.
16.  L9the fixer solution serves to both remove unexposed silver bromide grains and to harden the emulsion layer
A.
B.
17.  Movement, geometry, and screen contact are three factors that affect radiographic:
A.
B.
C.
D.
18.  Although there may be other reasons for using calcium tungstate screens in industrial radiography, they are most usually used to:
A.
B.
C.
D.
19.  A sheet of lead with an opening cut in the shape of the part to be radiographed may be used to decrease the effect of scattered radiation which undercuts the specimens. Such a device is called:
A.
B.
C.
D.
20.  Approximately what percent of the original radioactivity is left after six half-lives:
A.
B.
C.
D.
21.  The radiation quality of a manna-ray source is:
A.
B.
C.
D.
22.  In order to decrease geometric unsharpness:
A.
B.
C.
D.
23.  L1If the SNT-TC-1A guidlines are to be followed, the Lvl III technician should have the knowledge of other commonly used methods of NDT even though cert is needed in only the radiographic area.
A.
B.
24.  When producing radiographs, if the kilovoltage is increased:
A.
B.
C.
D.
25.  To produce X rays, electrons are accelerated to a high velocity by an electrical field and then suddenly stopped by a collision with a solid body. This body is called:
A.
B.
C.
D.
26.  L3Internal scatter is caused by X-ray energy that has taken a new direction within the specimen being radiographed.
A.
B.
27.  Two X-ray machines operating at the same nominal kilovoltage and milliamperage settings:
A.
B.
C.
D.
28.  L3 If back scatter is suspected as causing a loss of definiton, a lead letter can be placed between the film and the specimen to indicate possible scattered radiation.
A.
B.
29.  L9artifacts are often caused by improper use of safe-lights in the darkroom
A.
B.
30.  L5An "ion" is a charged part of an atom that can have either a +/- charge
A.
B.
31.  A thin metallic sheet (brass, copper, aluminum, etc) placed at the source to reduce effects of softer radiation is known as:
A.
B.
C.
D.
32.  L5when a photon goes through a "compton" effect, secondary radiation is often produced
A.
B.
33.  L1A Lvl I technician performing a radiographic test is permitted* to accept or reject the part provided that written instructions or procedures are given to him by a Lvl II or Lvl III. (*in accordance with SNT-TC-1A)
A.
B.
34.  L5An isotope, such as Cobalt 60, always emits rays that have a specific energy
A.
B.
35.  L2The higher the "amplitude" of an electromagnetic wave, the higher the energy.
A.
B.
36.  L2Frequency is described as the number of electromagnetic waves that pass a given point in one second.
A.
B.
37.  An advantage of the pocket dosimeter type of ionization chamber used to monitor radiation received by personnel is:
A.
B.
C.
D.
38.  If a film is placed in a developer solution and allowed to develop without any agitation:
A.
B.
C.
D.
39.  L3The best radiographic sensitivity is obtained when the radiograph has a "high contrast".
A.
B.
40.  Gamma and X-radiation interact with matter and may be absorbed by:
A.
B.
C.
D.
41.  An excellent radiograph is obtained under given exposure conditions with a tube current of 5 milliamperes and an exposure time of 12 minutes. If other conditions are not changed, what exposure time would be required if the X-ray tube current could be raised to 10 milliamperes?
A.
B.
C.
D.
42.  X rays and gamma rays always travel
A.
B.
C.
D.
43.  X-ray exposure may be due to:
A.
B.
C.
D.
44.  L9coarse-grain films are advantageous because they require considerably less time in the developer, stop bath and fixer solutions
A.
B.
45.  To prevent excessive backscatter from reaching a radiographic film, one should:
A.
B.
C.
D.
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