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.  X rays, gamma rays, and alpha particles all have one thing in common - they are all:
A.
B.
C.
D.
2.  During manual film processing, the purpose of the stop bath is to:
A.
B.
C.
D.
3.  L3Large grain films provide the best definition in a radiograph.
A.
B.
4.  L14filters absorb low energy radiation leaving higher average energy beams to penetrate the specimen
A.
B.
5.  Cobalt-60 used in nondestructive testing emits:
A.
B.
C.
D.
6.  Static marks, which are black tree-like or circular marks on a radiograph, are often caused by:
A.
B.
C.
D.
7.  In X-radiography, the ability to penetrate the test object is governed by:
A.
B.
C.
D.
8.  The selection of the proper type of film to be used for the X-ray examination of a particular part depends on:
A.
B.
C.
D.
9.  Very short wavelength electromagnetic radiation produced when electrons traveling at high speeds collide with matter is called:
A.
B.
C.
D.
10.  L5the energy of a photon cannot be destroyed, but can be converted into other forms by the photoelectric and compton effects
A.
B.
11.  The most common material used to provide protection against X rays is:
A.
B.
C.
D.
12.  A photographic image recorded by the passage of X or gamma rays through a specimen onto a film is called a:
A.
B.
C.
D.
13.  A beam of radiation consisting of a single wavelength is known as:
A.
B.
C.
D.
14.  Atoms, molecules, and various subatomic particles which carry either a positive or negative electrical charge are called:
A.
B.
C.
D.
15.  L3Inherent unsharpness causes poor contrast & definition but can be eliminated by using a longer source-to-film distance.
A.
B.
16.  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.
17.  Unwanted inclusions in a part will appear on a radiograph as:
A.
B.
C.
D.
18.  L2When X-ray film is developed, the portion that was exposed to radiation turns dark.
A.
B.
19.  L3Gradual changes in specimen thickness produce radiographs that show excellent definition.
A.
B.
20.  Penetrameters for ________ are considered Group 1 Materials and need not have an identification notch.
A.
B.
C.
D.
21.  Why is cobalt-60 used as a radiation source for medium-weight metals of thickness ranges from 1.5 to 9 inches:
A.
B.
C.
D.
22.  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.
23.  When manually processing films, the purpose for sharply taping hangers two or three times after the films have been lowered in the developer is to:
A.
B.
C.
D.
24.  The image of the required penetrameter and hole on the radiograph indicates that the radiograph has the required:
A.
B.
C.
D.
25.  Which of the following is an advantage of a fluoroscopic system when compared to a radiographic system:
A.
B.
C.
D.
26.  L2The term '' absorption'' refers to the ability of a material to permit X-rays to penetrate without loss of energy.
A.
B.
27.  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.
28.  L3Geometric unsharpness can be improved by keeping the film as close as possible to the specimen during an exposure.
A.
B.
29.  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.
30.  X rays and gamma rays always travel
A.
B.
C.
D.
31.  The metal that forms the image on a n X-ray film is:
A.
B.
C.
D.
32.  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.
33.  To prevent excessive backscatter from reaching a radiographic film, one should:
A.
B.
C.
D.
34.  L9the basic difference between types of x-ray film is due to the size of the grains of silver bromide
A.
B.
35.  Short wavelength electromagnetic radiation produced during the disintegration of nuclei or radioactive substances is called:
A.
B.
C.
D.
36.  A properly exposed radiograph that is developed in a developer solution at a temperature of 58F for 5 minutes will probably be:
A.
B.
C.
D.
37.  Which has the shortest wavelengths:
A.
B.
C.
D.
38.  A general rule used to define the amount of radiation exposure that is excessive is:
A.
B.
C.
D.
39.  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.
40.  Which of the following types of radiation is emitted by cobalt-60 and used in nondestructive testing:
A.
B.
C.
D.
41.  A fluoroscopic installation utilizing fluorescent screen requires:
A.
B.
C.
D.
42.  L5the "bremsstrahlung" process involves the production of ion pairs when one electron collides with another
A.
B.
43.  The radiation intensity of a radioisotope:
A.
B.
C.
D.
44.  A penetrameter is used to indicate:
A.
B.
C.
D.
45.  The intensity of X or Gamma radiation is measured in:
A.
B.
C.
D.
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