MCQOPTIONS
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MCQOPTIONS
This section includes 1267 Mcqs, each offering curated multiple-choice questions to sharpen your Embedded Systems knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
An advantage of AC equipment over DC is: |
| A. | AC is more penetrating |
| B. | AC is less hazardous |
| C. | AC makes the magnetic particles more mobile on the test surface |
| D. | AC equipment is heavier than DC |
| Answer» D. AC equipment is heavier than DC | |
| 552. |
The purpose of using a developer is: |
| A. | To create a contrasting background for the penetrants to ensure better visibility of indications |
| B. | Assists in reverse capillary action due to absorption ability of developers |
| C. | Prevent the part from corroding after the liquid penetrant test |
| D. | To ensure that the part has been correctly heat treated |
| Answer» C. Prevent the part from corroding after the liquid penetrant test | |
| 553. |
Applying the theory of the ‘Right Hand Rule’, a longitudinal surface defect in a round bar is detected by ‘current passing in a direction parallel to the direction of expected defects’ because: |
| A. | The current direction is in line with the defect |
| B. | The magnetic field is at right angles to the defect |
| C. | It makes no difference |
| D. | The magnetic field is parallel to the defect |
| Answer» C. It makes no difference | |
| 554. |
The typical sequence of conducting a visible solvent removable penetrant is: |
| A. | Pre-clean with a solvent wipe method |
| B. | Apply visible penetrant, keep wet, dwell time of 2 minutes |
| C. | Pour solvent on surface of part and wipe with waste cloth |
| D. | Spray on a thick layer of developer |
| Answer» E. | |
| 555. |
Calculate the refracted shear wave angle in steel [VS = 0.323cm/microsec] for anincident longitudinal wave of 45.7 degrees in Plexiglas [VL = 0.267cm/microsec] |
| A. | 64 degrees |
| B. | 45.7 degrees |
| C. | 60 degrees |
| D. | 70 degrees |
| Answer» D. 70 degrees | |
| 556. |
When radiographic energy is decreased: |
| A. | The subject contrast decreases |
| B. | The film contrast decreases |
| C. | The subject contrast increases |
| D. | The film contrast decreases |
| Answer» D. The film contrast decreases | |
| 557. |
What type of magnetization uses the formula: I = 45000/(L/D)N where I is the current in Amperes, N the number of turns of the magnetizing coil, L the length of the cylindrical test piece and D its diameter. |
| A. | Circular |
| B. | Longitudinal |
| C. | Swinging field |
| D. | Central conductor |
| Answer» C. Swinging field | |
| 558. |
If the required exposure time for a 2220 GBq (60 curie) Ir-192 source is 2 minutes,what exposure time would be required at 1110 GBq (30 curie) source: |
| A. | 2/3 minutes |
| B. | 60 minutes |
| C. | 2 minutes |
| D. | 4 minutes |
| Answer» E. | |
| 559. |
The adequacy of excess penetrant removal, using water washable penetrant process, is judged and controlled by: |
| A. | Water rinse time |
| B. | Fluorescent brightness measurement |
| C. | Visual observation |
| D. | Cleanliness of cloths used for removal |
| Answer» D. Cleanliness of cloths used for removal | |
| 560. |
Which of the following might cause non-relevant indications? |
| A. | Over magnetisation |
| B. | Indications at the edges of a braze joint |
| C. | A joint between hard and soft steels |
| D. | All of the above |
| Answer» E. | |
| 561. |
An advantage of the post emulsifiable penetrant testing process is that: |
| A. | Test pieces can be re-processed several times with little loss of sensitivity |
| B. | It is the most economical penetrant testing process |
| C. | It is highly susceptible to over washing |
| D. | It is not self emulsifying |
| Answer» B. It is the most economical penetrant testing process | |
| 562. |
A penetrant process which employs an emulsifier as a separate step in the penetrantremoval process is called: |
| A. | Solvent removable |
| B. | Water washable |
| C. | Post-emulsified |
| D. | Dual sensitivity method |
| Answer» D. Dual sensitivity method | |
| 563. |
What is the function of an emulsifier? |
| A. | To remove the excess penetrant |
| B. | To develop indications with a post emulsifiable penetrant system |
| C. | To assist penetration with a post emulsifiable penetrant system |
| D. | To make a post emulsifiable penetrant water washable |
| Answer» E. | |
| 564. |
What is the magnetic field strength at the surface of a 25mm diameter bar as comparedto that at the surface of a 50mm diameter bar, each carrying 1000 amps of current? |
| A. | Twice |
| B. | One half |
| C. | One quarter |
| D. | Four times |
| Answer» B. One half | |
| 565. |
Spurious or nonrelevant indications might be suspected if: |
| A. | Indications are unusually consistent in amplitude and appearance |
| B. | There are strong indications in localised areas |
| C. | The indications are localised and repeatable |
| D. | None of the above |
| Answer» B. There are strong indications in localised areas | |
| 566. |
A type of cast iron which has ultrasonic properties similar to steel is: |
| A. | White |
| B. | Gray |
| C. | Lamellar |
| D. | Ductile |
| Answer» B. Gray | |
| 567. |
The ability to detect echos from small reflectors is called: |
| A. | Resolution |
| B. | Attenuation |
| C. | Accuracy |
| D. | Sensitivity |
| Answer» E. | |
| 568. |
Reflection indications from a weld area being inspection by the angle beam techniquemay represent: |
| A. | Porosity |
| B. | Cracks |
| C. | Weld bead |
| D. | All of the above |
| Answer» E. | |
| 569. |
If the radiation intensity is 5 Gy/h (500 R/h) at a distance of 152.4 cm (5 feet) from asource, how far is it to the point where the radiation intensity is 0.05 Gy/h (5 R/h)? |
| A. | 1676.4 cm (55 feet) |
| B. | 1981 cm (65 feet) |
| C. | 1524 cm (50 feet) |
| D. | 762 cm (25 feet) |
| Answer» D. 762 cm (25 feet) | |
| 570. |
When contouring an angle beam wedge for a convex surface, an undesirable result ofa 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» B. Greater beam divergence due to larger contact area | |
| 571. |
Mottling due to X ray diffraction can be identified by: |
| A. | Noting a large change between two successive exposures with the test piece rotated slightly about the beam axis |
| B. | Noting a slight change between two successive exposures with the test piece rotated slightly about the beam axis |
| C. | Noting a characteristic pattern corresponding to the lattice spacing |
| D. | None of the above |
| Answer» C. Noting a characteristic pattern corresponding to the lattice spacing | |
| 572. |
Which of the following characteristics would be most important in a test piece whichis to be tested using the residual method? |
| A. | High rententivity |
| B. | High permeability |
| C. | Low reluctance |
| D. | Low permeability |
| Answer» B. High permeability | |
| 573. |
Which of the following is an advantage of the wet method? |
| A. | Excellent detection of completely subsurface discontinuities |
| B. | Ease of bath recovery and re-use |
| C. | Low flash point ensures freedom from fire hazards |
| D. | Relatively clean and easy to work with |
| Answer» C. Low flash point ensures freedom from fire hazards | |
| 574. |
What is the most important factor in determining the archival quality of radiographicfilm? |
| A. | Film density |
| B. | Image quality |
| C. | Degree of removal of fixer residues during washing |
| D. | Degree of removal of developer residues during washing |
| Answer» D. Degree of removal of developer residues during washing | |
| 575. |
An ultrasonic insrument control which is used to adjust the sharpness of the CRTscreen display is called: |
| A. | Astigmatism or focus |
| B. | Pulse repetition rate |
| C. | Pulse energy |
| D. | Gain |
| Answer» B. Pulse repetition rate | |
| 576. |
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» E. | |
| 577. |
According to ASTM E709-95 with prod technique, the prods shall be tipped if theopen circuit voltage is over: |
| A. | 10 V |
| B. | 15 V |
| C. | 20 V |
| D. | 25 V |
| Answer» E. | |
| 578. |
Which of the following would be considered a film artifact? |
| A. | Excessive film density |
| B. | Light leaks |
| C. | Inadequate penetration |
| D. | Sugar |
| Answer» C. Inadequate penetration | |
| 579. |
The most likely result of a too short dwell time of an emulsifier is: |
| A. | A tendency to remove the penetrant from fine discontinuities |
| B. | Incomplete removal of excess surface penetrant |
| C. | An overactive emulsifier |
| D. | All of the above |
| Answer» C. An overactive emulsifier | |
| 580. |
How is the wavelength of scattered radiation compared to the primary beam? |
| A. | Longer than the wavelength of the primary beam |
| B. | Shorter than the wavelength of the primary beam |
| C. | Same as the wavelength of the primary beam |
| D. | Not related |
| Answer» B. Shorter than the wavelength of the primary beam | |
| 581. |
Which of the following factors will affect the definition of the radiographic image? |
| A. | Intensity of radiation |
| B. | Film density |
| C. | Tube current |
| D. | Focal spot size |
| Answer» E. | |
| 582. |
Which of the following techniques would probably reduce the amount of backscattered radiation reaching the film during a radiographic exposure? |
| A. | Using a finer grained film |
| B. | Backing the cassette with a sheet of lead |
| C. | Removing lead screens |
| D. | All of the above |
| Answer» C. Removing lead screens | |
| 583. |
The current from portable high amperage units can be applied to the object using: |
| A. | Prods |
| B. | Cable coils |
| C. | Pre-wrapped coils |
| D. | All of the above |
| Answer» E. | |
| 584. |
Which of the following actions is performed by lead screens? |
| A. | Absorbs a portion of the primary radiation beam |
| B. | Preferentially absorbs soft X rays |
| C. | Emits electrons under gamma and X ray fields |
| D. | All of the above |
| Answer» E. | |
| 585. |
Contaminants which are commonly limited in penetrant materials are: |
| A. | Hydrogen and chlorine |
| B. | Carbon and sulphur |
| C. | Hydrogen and carbon |
| D. | Chlorine and sulphur |
| Answer» E. | |
| 586. |
Over washing during excess penetrant removal is less likely with which penetranttesting process? |
| A. | Solvent removable |
| B. | Water washable |
| C. | Post emulsifiable |
| D. | Self emuslifying |
| Answer» C. Post emulsifiable | |
| 587. |
Bubblers and wheel transducers are considered: |
| A. | Immersion techniques |
| B. | Modified immersion techniques |
| C. | Contact techniques |
| D. | Offset techniques |
| Answer» C. Contact techniques | |
| 588. |
According to ASTM E709-95, Table 3., direct current electromagnetic yokes musthave a lifting force of at least: |
| A. | 15 kg (33 lb) |
| B. | 16 kg (36 lb) |
| C. | 17 kg (38 lb) |
| D. | 18 kg (40 lb) |
| Answer» E. | |
| 589. |
Which of the following developers is applied by brush, spraying or dipping? |
| A. | Non-aqueous wet |
| B. | Water based wet |
| C. | Dry |
| D. | Dual sensitivity |
| Answer» C. Dry | |
| 590. |
Which of the following is normally considered acceptable practice? |
| A. | Sand blasting a soft aluminium part during pre-cleaning |
| B. | Performing a fluorescent penetrant test following a visible penetrant test |
| C. | performing a re-test on a part tested with a water washable penetrant process |
| D. | Removing excess penetrant with a water spray |
| Answer» E. | |
| 591. |
What are the three causes of non-relevant indications? |
| A. | Lack of fusion, change of section thickness, grinding cracks |
| B. | Change of section thickness, very high amperage, drilled hole near surface |
| C. | Very high amperage, drilled hole near surface, blow holes |
| D. | Drilled hole near surface, very high amperage, lack of fusion |
| Answer» C. Very high amperage, drilled hole near surface, blow holes | |
| 592. |
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» E. | |
| 593. |
An advantage of emulsifier application by dipping is: |
| A. | Excess penetrant is recovered in the emulsifier tank and reprocessed |
| B. | All of the test object is coated at approximately the same time |
| C. | Excess emulsifier drains back into the emulsifier tank for re-use |
| D. | Hydrophilic scrubbing is then easier to perform |
| Answer» C. Excess emulsifier drains back into the emulsifier tank for re-use | |
| 594. |
Approximately how long would it take for a 370 GBq (10 Ci) Co-60 source to decay to92.5 GBq (2.5 Ci)? |
| A. | 5.3 days |
| B. | 5.3 years |
| C. | 10.6 days |
| D. | 10.6 years |
| Answer» E. | |
| 595. |
The penetrant process best suited for the detection of very fine discontinuities is: |
| A. | Solvent removable |
| B. | Water washable |
| C. | Post emulsifiable |
| D. | Magnetic particle |
| Answer» D. Magnetic particle | |
| 596. |
A wider entry surface indication or pulse may result from: |
| A. | Side lobes of the sound beam being reflected from a rough surface |
| B. | Using a lower energy pulser |
| C. | Using a higher amplifier attenuation setting |
| D. | Huygen's principle |
| Answer» B. Using a lower energy pulser | |
| 597. |
Another name for a penetrameter is: |
| A. | Radiographic shim |
| B. | Image quality indicator |
| C. | Density standard |
| D. | Acceptance standard |
| Answer» C. Density standard | |
| 598. |
If the required exposure time for a 50 Curie Ir-192 source is 4 minutes, what exposuretime would be required at 25 Curie source: |
| A. | 4 minutes |
| B. | 8 minutes |
| C. | 2 minutes |
| D. | 16 minutes |
| Answer» C. 2 minutes | |
| 599. |
Which of the following transducer materials is the most efficient receiver of ultrasonic energy? |
| A. | Lead metaniobate |
| B. | Quartz |
| C. | Lithium sulphate |
| D. | Barium titanate |
| Answer» D. Barium titanate | |
| 600. |
Which of the following circuits provide current to operate the ultrasonic instrument? |
| A. | The pulse generator |
| B. | The amplifier |
| C. | The power supply |
| D. | The sweep generator |
| Answer» D. The sweep generator | |