These are a compilation of questions (black) and answers (Red) of typical questions asked on the NBRC test. Along with each answer the explanation is given for why that was the best chosen answer. ...
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LEVEL 1 & 2
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Radiography Testing Level i
1
of 1
RT
Question Excerpt For RT Level 1
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GENERAL THEORY
Page 1 of of 1
1. The amount of x-radiation or gamma radiation is often spoken of as the: a) Wavele elength. b) energy. c) intensity. d) frequency. 2. Unsharpness (Ug) resulting from using a large source size can be compensated for by: a) incre increasi asing ng sourc sourcee to spec specime imen n dista distance nce.. b) addition of lead screens. c) incre increasi asing ng spec specime imen n to film film dista distance nce.. d) usin sing a fas fastt fil film. 3. The emulsion or image layer of unexposed film contains grains of: a) black si silver. b) hypo. c) alkali. d) silve ilverr hali halid des. es. 4. What is the one requirement that every radiographic film base must have? a) flexibility. b) transparency. c) toughness. d) fine grain.
5. If radiation energy is increased, with all other conditions remaining constant, the resulting radiograph will ha a) grea greatl tly y impr improv ovee con contr tras ast. t. b) greatly improve definition. c) less ess con contra trast. st. d) a muc much h lowe lowerr dens densit ity. y. 6. Thin sheets of lead foil intimate contact with radiographic film density because they: a) fluoresce fluoresce and and emit emit visible visible light light which which helps helps expose expose the film. b) absorb the scattered radiation. c) prevent prevent back back scattered scattered radiation radiation from from fogging fogging the the film. film. d) emit emit elect electron ron whic which h helps helps darke darkerr the film film..
7. The fact that gases, when bombarded with radiation, ionise and become electrically conducting make them u a) x-ra x-ray y tra trans nsfo form rmer ers. s. b) x-ray tubes. c) masks. d) moni monito torin ring g equi equipm pmen ent. t. 8. Developer preferentially reduces: a) brom bromid idee ions ions ove overr silv silver er ion ions. s. b) silver ions over bromide ions. c) expose exposed d silver silver ions ions over over unexpo unexposed sed silve silverr ions. ions. d) unexpo unexposed sed silve silverr ions ions over over expose exposed d silver silver ions. ions.
