Take Free NDT RT Level 1 Exam Practice Test – Quiz Course

1.

Which of the following types of intensifying screens are not used in industrial radiography?

2.

Betatrons are used to produce X rays in what range?

3.

Which of the following is an isotope not artificially produced for industrial use:

4.

One half-value layer of lead for Iridium-192 is approximate:

5.

One half-value layer of lead for Cobalt-60 is approximate:

6.

The film processing step in which the undeveloped silver bromide is removed from the film emulsion is called:

7.

A radiation producing device that emits radiation of one or a few discreet wavelengths is:

8.

The intensifying action of lead screens is caused by:

9.

Most of the energy applied to an X-ray tube is converted into:

10.

Radiography of tubular sections using a double-wall, double viewing technique is mainly applicable to sections:

11.

Which of the following is the most common method of packaging film?

12.

Which of the following types of radiation is particulate?

13.

Most scattered radiation which adversely affects the radiographic image quality originates:

14.

An effect of scattered radiation is to:

15.

What is the most important factor in determining the archival quality of the radiographic film?

16.

Radiographic enlargement to distinguish small defects is possible:

17.

A detrimental effect of fluorescent screens might be:

18.

The penetrating power of an X-ray machine is indicated by:

19.

Reticulation may be the result of:

20.

The main advantage of having a small focal spot on an X-ray tube is:

21.

Cobalt-60 is produced by:

22.

For a particular isotope, the gamma radiation intensity is determined by:

23.

Which of the following statements should be true to achieve the highest level of radiographic sharpness (definition)?

24.

Which of the following correctly expresses the inverse square law if I₁=dose rate nearest source, I₂ =dose rate furthest from the source, D₁=distance nearest to source and D₂=distance furthest from the source:

25.

Thicker materials would normally be inspected using:

26.

Another name for a penetrameter is:

27.

The silver nitrate spot test can be used to:

28.

The difference in densities seen on a radiograph due to section changes in an item is:

29.

Which type of film would exhibit the coarsest grain?

30.

An advantage of a gamma-ray source is:

31.

Higher X ray tube voltages result in:

32.

A casting flaw which is formed when two masses of molten metal flowing from different directions flow together but fail to fuse is called:

33.

X rays are produced by:

34.

Which of the following is a function of lead screens?

35.

A silver nitrate spot test might be used to:

36.

A linear accelerator is used to produce X rays having energy in the range of:

37.

How is the wavelength of scattered radiation compared to the primary beam?

38.

Which of the following viewing conditions is most desirable for interpreting radiographic film?

39.

Pinhole radiography would be used to:

40.

A straight, dark line in the center of the film of a weld cap would probably be:

41.

Which one of the following steps is necessary to dissolve the undarkened silver salt crystals in the film emulsion:

42.

Approximately what energy X-ray machine would be required to have penetrating power equivalent to a Cobalt-60 source:

43.

The normal range of steel that is radiographed using Ir-192 is:

44.

The focal spot size of an X-ray machine must be known in order to determine:

45.

X-ray intensity is a function of :

46.

What is the minimum age in years at which a person may perform radiography :

47.

A densitometer is an instrument that measures:

48.

48 Which of the following is the correct formula to use for calculating geometric unsharpness if F=source size, T=specimen thickness, D=source to object distance and U_g =geometric unsharpness:

49.

A wetting agent is used in film processing to

50.

Film intensifying screens are normally used to:

51.

A radiation producing device that emits a broad spectrum of wavelengths is:

52.

Which of the following represent types of radiation stemming from radioactive decay :

53.

Explain the difference between X and gamma rays:

54.

Most industrial X-ray machines contain targets made of:

55.

The effects of scattered radiation may be lessened by:

56.

A reaction that occurs when a radiation beam of 500 keV is partially absorbed by a test piece would probably be:

57.

The term used to describe the reaction of human cells, other than reproductive cells, to ionizing radiation is:

58.

A low-density image of the letter ‘B’ on a radiographic film would probably be caused by:

59.

A term that refers to the sharpness of the radiographic image is:

60.

A dark, irregular indication which is located adjacent to the toe of the weld would probably be:

61.

A term that refers to the smallest detail visible in a radiograph is called:

62.

Which type of gamma-ray source would be used to radiograph a weld in a 150 mm thick steel plate?

63.

The radiation quality of a gamma-ray source is determined by:

64.

Generally, X-ray output is changed by changing the:

65.

Deep scratches on lead intensifying screens will cause?

66.

Which of the following is classified as electromagnetic radiation?

67.

The main disadvantage of having a small focal spot on an X-ray tube is:

68.

Exposure of the whole body to moderate radiation doses of 500 – 2000 mSv (50 to 200 rem) would probably cause which of the following effects?

69.

A reaction that occurs when a radiation beam of 90 keV is totally absorbed by a test piece would probably be:

70.

The term used to describe the reaction of human reproductive cells, to ionizing radiation is:

71.

Explain the difference between X and gamma rays:

72.

Which of the following is classified as electromagnetic radiation?

73.

The intensifying action of lead screens is caused by:

74.

How is the wavelength of scattered radiation related to the primary beam?

75.

X rays are produced by:

76.

Most of the energy applied to an X ray tube is converted into:

77.

Higher X-ray tube voltages result in:

78.

Betatrons are used to produce X rays having energy in the range of:

79.

A linear accelerator is used to produce X rays in what range?

80.

For a particular isotope, the gamma radiation intensity is determined by:

81.

A term used to describe the range of radiation intensities falling on the film during exposure is:

82.

An expression that is used to describe the slope of a film characteristic curve is:

83.

Which of the following factors affect film graininess?

84.

The amount of radioactivity which corresponds to 3.7 × 1010 disintegrations per second is called:

85.

The result of filtering the X rays is to produce:

86.

Which of the following actions is performed by lead screens?

87.

The total radiation dose received equals:

88.

Which of the following is the most common type of X ray tube?

89.

A reaction that occurs when a radiation beam of 15 MeV is partially absorbed by a test piece would probably be:

90.

A reaction that occurs when a radiation beam of 50 keV is partially absorbed by a test piece would probably be:

91.

A lethal dose of complete body radiation is normally considered to be:

92. Radiographic Testing Level 1 (RT-1) Specific Examination

1. Almost all gamma radiography today is done with artificially activated:

93.

A Curie (37 gigabecquerel)of radioactive material will disintegrate at the rate of:

94.

The specific activity of radioactive isotopes is measured in:

95.

What is the primary difference between X rays and gamma rays of the same energy?

96.

Screens should be:

97.

Lead foil in direct contact with the film in a cassette absorbs:

98.

Lead screens improve mainly the _______________________ of the final radiograph:

99.

Lead foil is placed behind the films to:

100.

A filter will reduce the amount of _______________ in the primary radiation beam:

101.

A filter is placed:

102.

The tube current in milliamps multiplied by the time in seconds or minutes equals:

103.

If we were to maintain the same exposure but decrease the source to film distance, we must ________________ the time of exposure:

104.

Lead screens act as intensifiers at voltage above:

105.

The use of a slower speed film improves the definition of the radiograph because the slower film:

106.

The penetrameter is a tool used to check the ________________ of a radiograph:

107.

When using a radioactive isotope in making a radiograph, we can express the equation for exposure as Ci × T. In this equation, Ci stands for:

108.

In the radiographic analysis procedure that is used to prepare an exposure chart, the first step is to:

109.

Which exposure factors are recorded in the process of making a step wedge analysis?

110.

19. After the step wedge radiographs have been made, the ____________ of the image of each step is recorded on chart:

111.

The process of loading more than one film into a cassette is known as the___________ technique:

112.

Which of the following isotopes are commonly used for radiographic purposes?

113.

The process of being radioactive is called (Choose one):

114.

Which of the following types of radiation is commonly used in radiographic testing?(Choose one):

115.

The amount of X radiation or gamma radiation is often spoken of as the____________ of the radiation:

116.

The speed at which X and gamma rays travel is: (choose one)

117.

A beam of radiation consisting of a single wavelength is known as: (choose one)

118.

What governs the penetrating ability of an X-ray beam?

119.

The shorter the wavelength of X or gamma rays:

120.

‘Photoelectric effect’ refers to:

121.

When a tissue cell in the human body is damaged by radiation:

122.

Lead intensifying screens are used to:

123.

An effect of scattered radiation is to:

124.

The effects of scattered radiation may be lessened by:

125.

Radiographic film speed can be increased by using:

126.

An advantage of a gamma-ray source is:

127.

A radiation producing device that emits radiation of one or a few discreet wavelengths is:

128.

A radiation producing device that emits a broad spectrum of wavelengths is:

129.

The primary effect of an increase in the milliamperage at which a X-ray tube is being operated would be to:

130.

The primary effect of an increase in the kilovoltage at which a X ray tube is being operated would be to:

131.

Which of the following types of intensifying screens are used in industrial radiography?

132.

Which of the following expressions correctly describe the relation between milliamperage (M) and focus-to-film distance (D)?

133.

Which of the following expressions correctly describes the relationship between exposure time (T) and focus-film distance (D)?

134.

Which of the following expressions correctly describes the relation between milliamperage (M) and exposure time (T)?

135.

A change in which of the following parameters would necessitate the construction of a new X ray exposure chart?

136.

The ASTM penetrameter for a 25 mm thick test piece contains holes of what sizes?

137.

The minimum size hole in an ASTM penetrameter is:

138.

A radiographic sensitivity level of 2-2T means that:

139.

What is the most desirable temperature for manual developer solutions?

140.

What is the longest period of time which should elapse between complete changes of developer solution?

141.

A possible result of failing to use a stop bath during manual development is:

142.

The mottled film may result from:

143.

Radiography of tubular sections using a double-wall, double viewing technique is mainly applicable to sections:

144.

A thin, white line within the film image of a weld crown might be: