McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 101. |
In the radiographic analysis procedure that is used to prepare an exposure chart, the first step is to: |
| A. | Make a series of radiographs of a step wedge |
| B. | Radiograph several objects of known thickness |
| C. | Convert the densities read from the radiographs to a standard density |
| D. | Plot the exposures on a graph |
| Answer» A. Make a series of radiographs of a step wedge | |
| 102. |
Which exposure factors are recorded in the process of making a step wedge analysis? |
| A. | Voltage and exposure |
| B. | Source-to-film distance and film |
| C. | Film density and materials |
| D. | All of the above |
| Answer» D. All of the above | |
| 103. |
After the step wedge radiographs have been made, the of the image of each step is recorded on chart: |
| A. | Sharpness |
| B. | Contrast |
| C. | Density |
| D. | Length |
| Answer» C. Density | |
| 104. |
The process of loading more than one film into a cassette is known as the technique: |
| A. | Single film technique |
| B. | Multiple film technique |
| C. | none |
| D. | none |
| Answer» B. Multiple film technique | |
| 105. |
Which of the following isotopes are commonly used for radiographic purposes? |
| A. | Iridium-192 |
| B. | Osmium-188 |
| C. | Cobalt-87 |
| D. | Rubidium |
| Answer» A. Iridium-192 | |
| 106. |
The process of being radioactive is called (Choose one): |
| A. | Heating |
| B. | Decaying |
| C. | Bremsstrahlung |
| D. | Rectification |
| Answer» B. Decaying | |
| 107. |
Which of the following types of radiation is commonly used in radiographic testing? (Choose one): |
| A. | Alpha particles |
| B. | Neutrons |
| C. | gamma rays |
| D. | Beta rays |
| Answer» C. gamma rays | |
| 108. |
The amount of X radiation or gamma radiation is often spoken of as the of the radiation: |
| A. | Wavelength |
| B. | Energy |
| C. | Intensity |
| D. | Frequency |
| Answer» C. Intensity | |
| 109. |
The speed at which X and gamma rays travel is: (choose one) |
| A. | The speed of light |
| B. | The speed of sound |
| C. | It varies with the wavelength |
| D. | Depends on the source |
| Answer» A. The speed of light | |
| 110. |
A beam of radiation consisting of a single wavelength is known as: (choose one) |
| A. | Microscopic radiation |
| B. | Monochromatic radiation |
| C. | Heterogeneous radiation |
| D. | Fluoroscopic radiation |
| Answer» B. Monochromatic radiation | |
| 111. |
What governs the penetrating ability of an X ray beam? |
| A. | Kilovoltage |
| B. | Time |
| C. | Activity |
| D. | Milliamperage |
| Answer» A. Kilovoltage | |
| 112. |
The shorter the wavelength of X or gamma rays: |
| A. | The higher their energy |
| B. | The faster they travel |
| C. | The greater their intensity |
| D. | The closer they are to becoming radio waves |
| Answer» A. The higher their energy | |
| 113. |
‘Photoelectric effect’ refers to: |
| A. | An electric camera |
| B. | Complete absorption of a photon |
| C. | The visible electromagnetic spectrum |
| D. | Scatter of neutrons |
| Answer» B. Complete absorption of a photon | |
| 114. |
When a tissue cell in human body is damaged by radiation: |
| A. | The cell may lose its ability to reproduce |
| B. | The cell may die |
| C. | Damage is caused by knocking an electron out of the orbit of its parent atom. |
| D. | All of the above |
| Answer» D. All of the above | |
| 115. |
Lead intensifying screens are used to: |
| A. | Decrease exposure time |
| B. | Increase grain size |
| C. | Shield film from stray light |
| D. | All of the above |
| Answer» A. Decrease exposure time | |
| 116. |
Radiographic film speed can be increased by using: |
| A. | A higher mA setting |
| B. | A lower mA setting |
| C. | A double emulsion versus a single emulsion film |
| D. | Lead screens versus fluorescent screens |
| Answer» D. Lead screens versus fluorescent screens | |
| 117. |
A radiation producing device which emits a broad spectrum of wavelengths is: |
| A. | A gamma ray source |
| B. | An X ray machine |
| C. | A Geiger Mueller tube |
| D. | A curie tube |
| Answer» B. An X ray machine | |
| 118. |
The primary effect of an increase in the milliamperage at which a X ray tube is being operated would be to: |
| A. | Increase the radiation intensity |
| B. | Increase penetrating power |
| C. | Increase primary beam wavelengths |
| D. | All of the above |
| Answer» A. Increase the radiation intensity | |
| 119. |
The primary effect of an increase in the kilovoltage at which a X ray tube is being operated would be to: |
| A. | Increase the radiation intensity |
| B. | Increase penetrating power |
| C. | Increase penetrating power and radiation intensity |
| D. | Increase primary beam wavelength |
| Answer» B. Increase penetrating power | |
| 120. |
Which of the following types of intensifying screens are used in industrial radiography? |
| A. | Lead |
| B. | Fluorescent |
| C. | Lead oxide |
| D. | All of the above |
| Answer» A. Lead | |
| 121. |
A change in which of the following parameters would necessitate the construction of a new X ray exposure chart? |
| A. | X ray machine used |
| B. | Film type |
| C. | Focal spot to film distance |
| D. | Any of the above |
| Answer» A. X ray machine used | |
| 122. |
The ASTM penetrameter for a 25 mm thick test piece contains holes of what sizes? |
| A. | T, 2T, 3T |
| B. | 2T, 3T, 4T |
| C. | T, 2T, 4T |
| D. | T, 3T, 4T |
| Answer» C. T, 2T, 4T | |
| 123. |
The minimum size hole in an ASTM penetrameter is: |
| A. | 0.127 mm (0.005inches) |
| B. | 0.254 mm (0.010 inches) |
| C. | 0.508 mm (0.020inches) |
| D. | 0.762 mm (0.030 inches) |
| Answer» B. 0.254 mm (0.010 inches) | |
| 124. |
A radiographic sensitivity level of 2-2T means that: |
| A. | The #2 hole in a #2 penetrameter must be visible on the film |
| B. | The 2T hole in a penetrameter which is 2% of the test piece thickness must be visible on the film |
| C. | The 2T hole in a #2 penetrameter must be visible on the film |
| D. | Two penetrameters which are each 2% of the test piece thickness must be used |
| Answer» B. The 2T hole in a penetrameter which is 2% of the test piece thickness must be visible on the film | |
| 125. |
What is the most desirable temperature for manual developer solutions? |
| A. | 15.5oC(60oF) |
| B. | 20oC (68oF) |
| C. | 22.2oC (72oF) |
| D. | 26.6oC (80oF) |
| Answer» B. 20oC (68oF) | |
| 126. |
What is the longest period of time which should elapse between complete changes of developer solution? |
| A. | 1 week |
| B. | 2 weeks |
| C. | 1 month |
| D. | 3 months |
| Answer» D. 3 months | |
| 127. |
A possible result of failing to use a stop bath during manual development is: |
| A. | Streaking of the film |
| B. | Underdevelopment of the film |
| C. | Contamination of the developer solution |
| D. | Developer solution drag-out |
| Answer» A. Streaking of the film | |
| 128. |
Mottled film may result from: |
| A. | Inadequate agitation of the film during development |
| B. | Inadequate water rinse during processing |
| C. | Using exhausted stop bath solution |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 129. |
Radiography of tubular sections using a double wall, double viewing technique is mainly applicable to sections: |
| A. | Over 38 mm in diameter |
| B. | 88 mm in diameter or less |
| C. | 125 mm in diameter and less |
| D. | Under 25 mm in diameter |
| Answer» C. 125 mm in diameter and less | |
| 130. |
A thin, white line within the film image of a weld crown might be: |
| A. | A hair between the lead screen and the film |
| B. | Incomplete penetration |
| C. | A crack |
| D. | Undercut |
| Answer» A. A hair between the lead screen and the film | |
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