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ASNT RT II Questions with Detailed Verified Answers
low voltage x-ray tubes are generally fitted with windows made of: Ans: ✓ ✓ ✓ beryllium
a monochromatic x-ray beam is: Ans: ✓ ✓ ✓ a beam consisting of a single wavelength
the general method of producing x-rays involves the sudden deceleration of high velocity electrons
in a solid body called a: Ans: ✓ ✓ ✓ target
if it were necessary to radiograph a 7" thick steel product, which gamma ray source would most
likely be used? Ans: ✓ ✓ ✓ co-60
a co-60 gamma source has an approximate practical thickness limit of: Ans: ✓ ✓ ✓ 9" of steel or its
equivalent
the absorption of gamma rays from a given source when passing through matter depends on the:
Ans: ✓ ✓ ✓ atomic number, density, and thickness of the matter
the fact that gases, when bombarded by radiation ionize and become electrical conductors make
them useful in: Ans: ✓ ✓ ✓ radiation detection equipment
the velocity of electrons striking the target in an x-ray tube is a function of the: Ans: ✓ ✓ ✓ voltage
difference between the cathode and anode
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the uneven distribution of developed grains within the emulsion of a processed x-ray film causes
the subjective impression of: Ans: ✓ ✓ ✓ graininess
the gamma ray intensity at 1 ft from a 1 Ci source of radioactive co-60 is nearest to: Ans: ✓ ✓ ✓ 15
R/h
the focal spot in an x-ray tube: Ans: ✓ ✓ ✓ should be as small as possible without unduly
shortening the life of the tube
in an x-ray tube, the filament and focusing cup are the two essential parts of the: Ans: ✓ ✓ ✓
cathode
the quantity of radiation which will produce, by means of ionization, one electrostatic unit of
electricity in 0.001293 g of dry air is known as a: Ans: ✓ ✓ ✓ Roentgen
the specific activity of an isotopic source is usually measured in: Ans: ✓ ✓ ✓ curies per gram (Ci/g)
which isotope has the longest half-life? Ans: ✓ ✓ ✓ Cs- 137
the primary form of energy conversion when electrons strike a target in an x-ray tube results in the
production of: Ans: ✓ ✓ ✓ heat
the slope of a straight line joining two points of specified densities on a characteristic curve of a film
is known as the: Ans: ✓ ✓ ✓ average gradient
an x-ray film having wide latitude also has, by definition: Ans: ✓ ✓ ✓ low contrast
the purpose of circulating oil in some types of x-ray tubes is to: Ans: ✓ ✓ ✓ dissipate heat
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ASNT RT II Questions with Detailed Verified Answers
low voltage x-ray tubes are generally fitted with windows made of: Ans: ✓ ✓ ✓ beryllium
a monochromatic x-ray beam is: Ans: ✓ ✓ ✓ a beam consisting of a single wavelength
the general method of producing x-rays involves the sudden deceleration of high velocity electrons
in a solid body called a: Ans: ✓ ✓ ✓ target
if it were necessary to radiograph a 7" thick steel product, which gamma ray source would most
likely be used? Ans: ✓ ✓ ✓ co-60
a co-60 gamma source has an approximate practical thickness limit of: Ans: ✓ ✓ ✓ 9" of steel or its
equivalent
the absorption of gamma rays from a given source when passing through matter depends on the:
Ans: ✓ ✓ ✓ atomic number, density, and thickness of the matter
the fact that gases, when bombarded by radiation ionize and become electrical conductors make
them useful in: Ans: ✓ ✓ ✓ radiation detection equipment
the velocity of electrons striking the target in an x-ray tube is a function of the: Ans: ✓ ✓ ✓ voltage
difference between the cathode and anode
© Get it right 2025 Getaway - Stuvia US All rights reserved
, Click here for more: Scholars nexus
the uneven distribution of developed grains within the emulsion of a processed x-ray film causes
the subjective impression of: Ans: ✓ ✓ ✓ graininess
the gamma ray intensity at 1 ft from a 1 Ci source of radioactive co-60 is nearest to: Ans: ✓ ✓ ✓ 15
R/h
the focal spot in an x-ray tube: Ans: ✓ ✓ ✓ should be as small as possible without unduly
shortening the life of the tube
in an x-ray tube, the filament and focusing cup are the two essential parts of the: Ans: ✓ ✓ ✓
cathode
the quantity of radiation which will produce, by means of ionization, one electrostatic unit of
electricity in 0.001293 g of dry air is known as a: Ans: ✓ ✓ ✓ Roentgen
the specific activity of an isotopic source is usually measured in: Ans: ✓ ✓ ✓ curies per gram (Ci/g)
which isotope has the longest half-life? Ans: ✓ ✓ ✓ Cs- 137
the primary form of energy conversion when electrons strike a target in an x-ray tube results in the
production of: Ans: ✓ ✓ ✓ heat
the slope of a straight line joining two points of specified densities on a characteristic curve of a film
is known as the: Ans: ✓ ✓ ✓ average gradient
an x-ray film having wide latitude also has, by definition: Ans: ✓ ✓ ✓ low contrast
the purpose of circulating oil in some types of x-ray tubes is to: Ans: ✓ ✓ ✓ dissipate heat
© Get it right 2025 Getaway - Stuvia US All rights reserved
