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.
| 1001. |
Which of the following penetrants must be treated with an emulsifier prior to waterremoval? |
| A. | Solvent removable |
| B. | Water washable |
| C. | Post emulsifiable |
| D. | Fluorescent |
| Answer» D. Fluorescent | |
| 1002. |
Contrast and definition are the two major factors that determine the ofthe radiograph: |
| A. | Density |
| B. | Sensitivity |
| C. | Graininess |
| D. | Intensity |
| Answer» C. Graininess | |
| 1003. |
The primary reason for using water rather than oil as a suspension medium for wetmethod baths is that |
| A. | Water is more chemically inert than oil |
| B. | Bath flammability hazards are eliminated |
| C. | Water has the capability to dissolve the needed rust inhibitors |
| D. | Water baths may be used at a lower temperature than oil baths |
| Answer» C. Water has the capability to dissolve the needed rust inhibitors | |
| 1004. |
A dark, irregular indication which is located adjacent to the toe of the weld wouldprobably be: |
| A. | Undercut |
| B. | Incomplete penetration |
| C. | Porosity |
| D. | Tungsten inclusions |
| Answer» B. Incomplete penetration | |
| 1005. |
Natural discontinuities comparable in size to the penetrameter holes shown on aradiograph may not be detected because: |
| A. | Natural discontinuities may contain less dense material than the penetrameter holes |
| B. | Natural discontinuities may be thicker than the penetrameter holes |
| C. | Natural discontinuities do not necessarily have as sharp edges as the penetrameter holes |
| D. | All of the above |
| Answer» D. All of the above | |
| 1006. |
Which of the following is an advantage of the dry method |
| A. | Good sensitivity for subsurface discontinuities |
| B. | Faster than wet method for quantities of small test pieces |
| C. | Easily applied in an automated system |
| D. | Easy coverage of surfaces of irregularly shaped test pieces |
| Answer» B. Faster than wet method for quantities of small test pieces | |
| 1007. |
The magnetic field outside a conductor decreases: |
| A. | Exponentially |
| B. | In a linear manner |
| C. | Inversely with distance |
| D. | Inversely with the square of distance |
| Answer» C. Inversely with distance | |
| 1008. |
The second critical angle is defined as the longitudinal wave incident angle whichresults in: |
| A. | A refracted longitudinal wave of ninety degrees |
| B. | A refracted shear wave of ninety degrees |
| C. | Complete reflection of the sound beam |
| D. | None of the above |
| Answer» C. Complete reflection of the sound beam | |
| 1009. |
The normal range of steel that is radiographed using Ir-192 is: |
| A. | 5 mm–20 mm |
| B. | 25 mm – 75 mm |
| C. | 0.5 mm – 5 mm |
| D. | 75 mm – 150 mm |
| Answer» C. 0.5 mm – 5 mm | |
| 1010. |
The type of discontinuity potentially most harmful to the useful life of a part is: |
| A. | Slag inclusions |
| B. | Magnetic writing |
| C. | Porosity |
| D. | Surface cracks |
| Answer» E. | |
| 1011. |
If the radiation intensity is 5 Gy/h (500 R/h) at a distance of 152.4 cm (5 feet) from asource, what is the intensity at 1524 cm (50 feet)? |
| A. | 0.5 Gy/h (50 R/h) |
| B. | 1.0 Gy/h (100 R/h) |
| C. | 0.1 Gy/h (10R/h) |
| D. | 0.05 Gy/h (5 R/h) |
| Answer» E. | |
| 1012. |
A technique in which two transducers are used, one on each side of the test piece, iscalled: |
| A. | Angle beam testing |
| B. | Modified immersion testing |
| C. | Through transmission testing |
| D. | Twinning |
| Answer» D. Twinning | |
| 1013. |
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» E. | |
| 1014. |
In a basic ultrasonic test pattern (A scan) for contact testing, the initial pulse (assumeno sweep delay is used): |
| A. | Is the high indication on the extreme left side of the screen that represents the entry surface of the inspected part |
| B. | Is the first pulse that occurs near the right side of the screen and represents the opposite boundary of the inspected part |
| C. | Is an indication that appears and disappears during screening |
| D. | Is always the second pulse from the left on the viewing screen |
| Answer» B. Is the first pulse that occurs near the right side of the screen and represents the opposite boundary of the inspected part | |
| 1015. |
The gamma factor of Ir-192 is: |
| A. | 1.37 R·h-1·Ci-1at one metre |
| B. | 0.59 R·h-1·Ci-1at one metre |
| C. | 0.0062 R·h-1·Ci-1at one metre |
| D. | 0.38 R·h-1·Ci-1at one metre |
| Answer» C. 0.0062 R·h-1·Ci-1at one metre | |
| 1016. |
The upper limit of human hearing is normally considered to be about: |
| A. | 12 kHz |
| B. | 16 kHz |
| C. | 20 kHz |
| D. | 30 kHz |
| Answer» D. 30 kHz | |
| 1017. |
Ferromagnetic material is: |
| A. | Strongly attracted by a magnet |
| B. | Capable of being magnetized |
| C. | Both (a) and (b) |
| D. | Not capable of being magnetized |
| Answer» D. Not capable of being magnetized | |
| 1018. |
A significant limitation of a lower frequency, single element transducer is: |
| A. | Scatter of sound beam due to microstructure of test object |
| B. | Increased grain noise or ‘hash’ |
| C. | Less beam spread |
| D. | Impaired ability to display discontinuities just below the entry surface |
| Answer» E. | |
| 1019. |
An interaction in which radiation is produced by the rapid deceleration of an electronis called: |
| A. | The photoelectric effect |
| B. | The Compton effect |
| C. | Pair production |
| D. | Bremsstrahlung |
| Answer» E. | |
| 1020. |
Choice of ultrasonic test frequency depends upon which of the following? |
| A. | Surface condition |
| B. | Minimum size discontinuity to be detected |
| C. | Level of grain noise |
| D. | All of the above |
| Answer» E. | |
| 1021. |
A common use of ultrasonic testing is: |
| A. | Cleaning |
| B. | Detecting of sub-surface indications |
| C. | Determination of the test piece ductility |
| D. | Communications |
| Answer» C. Determination of the test piece ductility | |
| 1022. |
What is the best advantage achieved in exposure time, using front and back lead screens, as compared to exposure time without screens? |
| A. | About the same, but less scatter |
| B. | About twice as great, but less scatter |
| C. | 1/2 to 1/3 |
| D. | Not related |
| Answer» D. Not related | |
| 1023. |
A split coil would most likely be used with a: |
| A. | DC yoke |
| B. | Split phase AC yoke |
| C. | Stationary magnetic particle unit |
| D. | Portable magnetic particle unit |
| Answer» E. | |
| 1024. |
According to ASTM E709-95, the UV intensity shall not be less than: |
| A. | 600 µW/cm2 |
| B. | 700 µW/cm2 |
| C. | 800 µW/cm2 |
| D. | 900 µW/cm2 |
| Answer» D. 900 µW/cm2 | |
| 1025. |
The velocity of sound waves is primarily dependent on: |
| A. | The pulse length |
| B. | The frequency |
| C. | The material in which the sound is being transmitted and the mode of vibration |
| D. | None of the above |
| Answer» D. None of the above | |
| 1026. |
Which of the following is the least efficient generator of ultrasonic waves: |
| A. | Quartz |
| B. | Lithium sulphate |
| C. | Lead metaniobate |
| D. | Barium titanate |
| Answer» B. Lithium sulphate | |
| 1027. |
A penetrant testing method in which the degree of washability can be controlled by theoperator is called: |
| A. | Self emulsifying |
| B. | Post emulsifiable |
| C. | Water washable |
| D. | Solvent removable |
| Answer» D. Solvent removable | |
| 1028. |
The type of current that is best suited to detect surface discontinuities is: |
| A. | DC |
| B. | AC |
| C. | Pulsating DC |
| D. | Half wave |
| Answer» C. Pulsating DC | |
| 1029. |
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» B. The faster they travel | |
| 1030. |
Surface breaking porosity will show what type of relevant indications when a weldedaluminium plate is tested with the liquid penetrant method: |
| A. | Linear indications |
| B. | Square indications |
| C. | Triangular indications |
| D. | Rounded indications |
| Answer» C. Triangular indications | |
| 1031. |
Use of a slower speed film improves the definition of the radiograph because theslower film: |
| A. | Requires more exposure |
| B. | Is more sensitive to X rays |
| C. | Requires less voltage |
| D. | Has finer grains |
| Answer» E. | |
| 1032. |
A lethal dose of complete body radiation is normally considered to be: |
| A. | 1-2 Sv (100-200 rem) |
| B. | 250-500 mSv (25-50 rem) |
| C. | 6-8 Sv (600-800 rem) |
| D. | 500 mSv (50000 mrem) |
| Answer» D. 500 mSv (50000 mrem) | |
| 1033. |
In a basic pulse-echo ultrasonic instrument, the component that produces the timebase line is called a: |
| A. | Sweep circuit |
| B. | Receiver |
| C. | Pulser |
| D. | Synchroniser |
| Answer» B. Receiver | |
| 1034. |
An advantage of a gamma ray source is: |
| A. | Radiation may be turned on or off at will |
| B. | Outside power is normally not required |
| C. | Less shielding is required than for X ray |
| D. | All of the above |
| Answer» C. Less shielding is required than for X ray | |
| 1035. |
Maximum practical prod spacing is about: |
| A. | 100 mm |
| B. | 200 mm |
| C. | 300 mm |
| D. | 450 mm |
| Answer» C. 300 mm | |
| 1036. |
Sound beam intensity decreases expontentially with distance in the area called: |
| A. | The near field |
| B. | The far field |
| C. | The dead zone |
| D. | The delay line |
| Answer» C. The dead zone | |
| 1037. |
The ‘skin’ effect would be most noticeable in which of the following? |
| A. | A magnetic conductor carrying a DC current |
| B. | A nonmagnetic conductor carrying a DC current |
| C. | A magnetic conductor carrying a 50 Hz AC current |
| D. | A nonmagnetic conductor carrying a 50 Hz AC current |
| Answer» E. | |
| 1038. |
‘Film contrast’ is the inherent ability of a film to show for agiven change in film exposure. |
| A. | No appreciable change in density |
| B. | Graininess |
| C. | A difference in density |
| D. | No graininess |
| Answer» D. No graininess | |
| 1039. |
According to ASTM E709-95 when applying fluorescent magnetic particles technique,the operator shall be in darkness area at least......................prior to examination: |
| A. | 2 min |
| B. | 3 min |
| C. | 4 min |
| D. | 5 min |
| Answer» C. 4 min | |
| 1040. |
Demagnetization, ASTM E709-95 recommends a coil of ampere-turns: |
| A. | 1000 to 3000 |
| B. | 3000 to 5000 |
| C. | 5000 to 10000 |
| D. | 10000 to 15000 |
| Answer» D. 10000 to 15000 | |
| 1041. |
According to AST M E709-95 and API, after removing magnetization of parts afterexamination, the residual magnetism shall not exceed (1 gauss = 0.0001 tesla): |
| A. | 3 × 10-4T (3gauss) |
| B. | 4 × 10-4T (4 gauss) |
| C. | 6 × 10-4T (6gauss) |
| D. | 8 × 10-4T (8 gauss) |
| Answer» B. 4 × 10-4T (4 gauss) | |
| 1042. |
Which of the following expressions correctly determines radiographic density? |
| A. | Io/It |
| B. | Log (Io/It) |
| C. | Log (Io-It) |
| D. | Io-It |
| Answer» C. Log (Io-It) | |
| 1043. |
The half-life of Th-170 is approximately: |
| A. | 74 days |
| B. | 129 days |
| C. | 5.3 years |
| D. | 30.1 years |
| Answer» C. 5.3 years | |
| 1044. |
The primary effect of an increase in the milliamperage at which a X ray tube is beingoperated would be to: |
| A. | Increase the radiation intensity |
| B. | Increase penetrating power |
| C. | Increase primary beam wavelengths |
| D. | All of the above |
| Answer» B. Increase penetrating power | |
| 1045. |
The number of complete waves which pass a given point in a given period of time(usually one second) is referred to as the: |
| A. | Amplitude of a wave motion |
| B. | Pulse length of a wave motion |
| C. | Frequency of a wave motion |
| D. | Wavelength of a wave motion |
| Answer» D. Wavelength of a wave motion | |
| 1046. |
Which of the following is an isotope not artificially produced for industrial use: |
| A. | Ir-192 |
| B. | Ra-226 |
| C. | Co-60 |
| D. | All of the above |
| Answer» C. Co-60 | |
| 1047. |
Pipe would be classified as what type of discontinuity? |
| A. | Inherent |
| B. | Processing |
| C. | Service |
| D. | None of the above |
| Answer» B. Processing | |
| 1048. |
A hydrometer is used to measure: |
| A. | Penetrant viscosity |
| B. | Specific gravity of water based wet developers |
| C. | Penetrant specific gravity |
| D. | Cleaner specific gravity |
| Answer» C. Penetrant specific gravity | |
| 1049. |
Which type of gamma ray source would be used to radiograph a weld in 150 mm thicksteel plate? |
| A. | Ir-192 |
| B. | Co-60 |
| C. | Tm-170 |
| D. | Cs-137 |
| Answer» C. Tm-170 | |
| 1050. |
Lithium sulphate, barium titanate and lead metaniobate are examples of: |
| A. | Magnetostrictive elements |
| B. | Piezoelectric elements |
| C. | Rochelle salts |
| D. | Y cut crystals |
| Answer» C. Rochelle salts | |