McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 101. |
In which zone does the amplitude of an indication from a given discontinuity diminish exponentially as the distance increases? |
| A. | Far field zone |
| B. | Near field zone |
| C. | Dead zone |
| D. | Fresnel zone |
| Answer» A. Far field zone | |
| 102. |
A typical application for a through transmission technique is: |
| A. | Flaw depth sizing |
| B. | Flaw depth location |
| C. | Thickness measuring |
| D. | Bond/lack of bond testing |
| Answer» D. Bond/lack of bond testing | |
| 103. |
An advantage of a dual crystal search unit is that: |
| A. | There is no ‘dead zone’ |
| B. | There is no near surface resolution |
| C. | There is no near field |
| D. | All of the above are true |
| Answer» A. There is no ‘dead zone’ | |
| 104. |
Most contact testing is performed by which of the following techniques? |
| A. | Through transmission |
| B. | Pitch-catch |
| C. | Pulse-echo |
| D. | Continuous wave |
| Answer» C. Pulse-echo | |
| 105. |
When contouring an angle beam wedge for a convex surface, an undesirable result of a wedge which is contoured too well might be: |
| A. | Production of unwanted surface waves |
| B. | Greater beam divergence due to larger contact area |
| C. | Lower beam divergence due to larger contact area |
| D. | Overly efficient coupling of sound beam into test part |
| Answer» A. Production of unwanted surface waves | |
| 106. |
It is possible for a discontinuity smaller than the transducer to produce indications of fluctuating amplitude as the search unit is moved laterally if testing is being performed in the: |
| A. | Fraunhofer zone |
| B. | Near field |
| C. | Snell field |
| D. | Shadow zone |
| Answer» B. Near field | |
| 107. |
A smooth flat discontinuity whose major plane is not perpendicular to the direction of sound propagation may be indicated by: |
| A. | An echo amplitude comparable in magnitude to the back surface reflection |
| B. | A complete loss of back surface reflection |
| C. | An echo amplitude larger in magnitude than the back surface reflection |
| D. | All of the above |
| Answer» B. A complete loss of back surface reflection | |
| 108. |
An effective method of testing for air bubbles in a pipe is to: |
| A. | Measure pipe back wall echo amplitude |
| B. | Analyze the frequency spectrum of pipe back wall echo |
| C. | Transmit sound across pipe diameter and look for echo loss |
| D. | Transmit sound across pipe diameter and look for echoes from air bubbles |
| Answer» D. Transmit sound across pipe diameter and look for echoes from air bubbles | |
| 109. |
The ultrasonic test method in which finger damping is most effective in locating a discontinuity is: |
| A. | Shear wave |
| B. | Longitudinal wave |
| C. | Surface wave |
| D. | Compression wave |
| Answer» C. Surface wave | |
| 110. |
Inspection of castings is often impractical because of: |
| A. | Extremely small grain structure |
| B. | Coarse grain structure |
| C. | Uniform flow lines |
| D. | Uniform velocity of sound |
| Answer» B. Coarse grain structure | |
| 111. |
One of the most common applications of ultrasonic tests employing shear waves is the: |
| A. | Detection of discontinuities in welds, tube and pipe |
| B. | Determination of elastic properties of metallic products |
| C. | Detection of laminar discontinuities in heavy plate |
| D. | Measurement of thickness of thin plate |
| Answer» A. Detection of discontinuities in welds, tube and pipe | |
| 112. |
The 2 mm wide notch in the IIW block is used to: |
| A. | Determine beam index point |
| B. | Check resolution |
| C. | Calibrate angle beam distance |
| D. | Check beam angle |
| Answer» B. Check resolution | |
| 113. |
A primary purpose of a reference standard is: |
| A. | To provide a guide for adjusting instrument controls to reveal discontinuities that are considered harmful to the end use of the product |
| B. | To give the technician a tool for determining exact discontinuity size |
| C. | To provide assurance that all discontinuities smaller than a certain specified reference reflector are capable of being detected by the test |
| D. | To provide a standard reflector which exactly simulates natural discontinuities of a critical size |
| Answer» C. To provide assurance that all discontinuities smaller than a certain specified reference reflector are capable of being detected by the test | |
| 114. |
Laminations would most likely be encountered in which of the following product forms? |
| A. | Forgings |
| B. | Hot rolled plate |
| C. | Castings |
| D. | Welds |
| Answer» B. Hot rolled plate | |
| 115. |
A 50 percent decrease in echo amplitude is equal to a loss of how many decibels? |
| A. | 2 |
| B. | 6 |
| C. | 10 |
| D. | 14 |
| Answer» B. 6 | |
| 116. |
Typical frequencies which might be used to perform ultrasonic testing of concrete are: |
| A. | 25 to 100 kHz |
| B. | 200 kHz to 5 MHz |
| C. | 1 MHz to 5 MHz |
| D. | 2.25 MHz to 10 MHz |
| Answer» A. 25 to 100 kHz | |
| 117. |
Compared to the echo returned from a smooth reflector, the echo returned from a natural flaw of the same area and orientation is: |
| A. | The same |
| B. | Greater |
| C. | Smaller |
| D. | Not related to |
| Answer» C. Smaller | |
| 118. |
Which of the following is least likely to be a source of false indications? |
| A. | Discontinuities oriented at an angle to the entry surface |
| B. | Contoured surfaces |
| C. | Edge effects |
| D. | Surface condition |
| Answer» D. Surface condition | |
| 119. |
Abnormally large grain size in the test material may be indicated by: |
| A. | High levels of baseline noise, or hash |
| B. | High amplitude reflections between front and back surface echoes |
| C. | High amplitude, spurious echoes which are not repeatable |
| D. | Abnormally high back surface echo |
| Answer» A. High levels of baseline noise, or hash | |
| 120. |
The coated inside surface of the large end of a cathode ray tube which becomes luminous when struck by an electron beam is called: |
| A. | An electron gun |
| B. | An electron amplifier |
| C. | A CRT screen |
| D. | An electron counter |
| Answer» C. A CRT screen | |
| 121. |
In a basic pulse-echo ultrasonic instrument, the component that produces the time base line is called a: |
| A. | Sweep circuit |
| B. | Receiver |
| C. | Pulser |
| D. | Synchroniser |
| Answer» A. Sweep circuit | |
| 122. |
Gas discontinuities are reduced to flat discs or other shapes parallel to the surface by: |
| A. | Rolling |
| B. | Machining |
| C. | Casting |
| D. | Welding |
| Answer» A. Rolling | |
| 123. |
Reflection indications from a weld area being inspection by the angle beam technique may represent: |
| A. | Porosity |
| B. | Cracks |
| C. | Weld bead |
| D. | All of the above |
| Answer» D. All of the above | |
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