MCQOPTIONS
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MCQOPTIONS
This section includes 335 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
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» B. Near field zone | |
| 202. |
A reaction which occurs when a radiation beam of 50 keV is partially absorbed by a test piece would probably be: |
| A. | The Compton effect |
| B. | The photoelectric effect |
| C. | Pair production |
| D. | Any of the above |
| Answer» C. Pair production | |
| 203. |
Strong signals which travel across the horizontal time base of an A scan presentation while the transducer is motionless on the test piece are probably: |
| A. | Randomly oriented flaws |
| B. | Electrical interference |
| C. | Grain noise |
| D. | Loose wedge on transducer |
| Answer» C. Grain noise | |
| 204. |
A reaction which occurs when a radiation beam of 15 MeV is partially absorbed by a test piece would probably be: |
| A. | The Compton effect |
| B. | The photoelectric effect |
| C. | Pair production |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 205. |
What is the most important factor in determining the archival quality of radiographic film? |
| 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 | |
| 206. |
Which of the following would be likely to cause variations in the output of an inspection black light? |
| A. | Voltage fluctuations |
| B. | Aged bulb |
| C. | Dirty filter |
| D. | All of the above |
| Answer» E. | |
| 207. |
When variations are noticed in the front surface reflection, the test piece should be inspected for possible near surface discontinuities by: |
| A. | Using a lower frequency transducer |
| B. | Using a higher pulse energy |
| C. | Inspecting from the opposite side |
| D. | Calibrating on a smaller diameter flat bottom hole |
| Answer» D. Calibrating on a smaller diameter flat bottom hole | |
| 208. |
A reaction which occurs when a radiation beam of 90 keV is totally absorbed by a test piece would probably be: |
| A. | The Compton effect |
| B. | The photoelectric effect |
| C. | Pair production |
| D. | Any of the above |
| Answer» C. Pair production | |
| 209. |
Laminations would most likely be encountered in which of the following product forms? |
| A. | Forgings |
| B. | Hot rolled plate |
| C. | Castings |
| D. | Welds |
| Answer» C. Castings | |
| 210. |
Approximately what energy X ray machine would be required to have penetrating power equivalent to a Cobalt-60 source: |
| A. | 600 keV |
| B. | 1.2 MeV |
| C. | 2 MeV |
| D. | None of the above |
| Answer» C. 2 MeV | |
| 211. |
Which of the following materials would probably require testing at the lowest frequency? |
| A. | Small grained mild steel |
| B. | Mild steel castings |
| C. | Mild steel forgings |
| D. | Cast iron |
| Answer» E. | |
| 212. |
Exposure of whole body to moderate radiation doses of 500 2000 mSv (50 to 200 rem) would probably cause which of the following effects? |
| A. | Blood cell changes |
| B. | Swelling |
| C. | Possible nausea |
| D. | All of the above |
| Answer» E. | |
| 213. |
A reaction which occurs when a radiation beam of 500 keV is partially absorbed by a test piece would probably be: |
| A. | The Compton effect |
| B. | The photoelectric effect |
| C. | Pair production |
| D. | Any of the above |
| Answer» B. The photoelectric effect | |
| 214. |
Acoustic energy propagates in different modes. Which of the following represent a mode? |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | All of the above |
| Answer» E. | |
| 215. |
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 | |
| 216. |
The point at which the magnetism in a material cannot be increased even though the magnetising force continues to increase is known as the: |
| A. | Salient pole |
| B. | Saturation point |
| C. | Residual point |
| D. | Remnant point |
| Answer» C. Residual point | |
| 217. |
Which of the following product forms would probably be tested at the lowest frequency? |
| A. | Forgings |
| B. | Hot rolled plate |
| C. | Castings |
| D. | Extrusions |
| Answer» D. Extrusions | |
| 218. |
Addition of approximately 6% antimony as an alloying element could be expected to increase the ultrasonic inspectability of which of the following materials? |
| A. | Low carbon steel |
| B. | Stainless steel |
| C. | Iron |
| D. | Pure lead |
| Answer» E. | |
| 219. |
What type of penetrant process would be best suited to an application at near freezing temperatures? |
| A. | Solvent removable |
| B. | Water washable |
| C. | Post emulsifiable |
| D. | None of the above |
| Answer» E. | |
| 220. |
Entry surface resolution is a characteristic of an ultrasonic testing system which defines its ability to: |
| A. | Detect discontinuities oriented in a direction parallel to the ultrasonic beam |
| B. | Detect discontinuities located in the center of a forging containing a fine metallurgical structure |
| C. | Detect minute surface scratches |
| D. | Detect discontinuities located just beneath the entry surface in the part being tested |
| Answer» E. | |
| 221. |
Approximately how long would it take for a 370 GBq (10 Ci) Co-60 source to decay to 92.5 GBq (2.5 Ci)? |
| A. | 5.3 days |
| B. | 5.3 years |
| C. | 10.6 days |
| D. | 10.6 years |
| Answer» E. | |
| 222. |
If 37 GBq (1 Ci), of Ir-92 produces dose rate of 0.59 Gy/h (59000 mR/h) at 30.5 cm (1 foot), how much dose in Gy/h (R/h) will 370 GBq (10 Ci) produce at the same distance? |
| A. | 0.59 Gy/h (59000R/h) |
| B. | 0.0059 Gy/h (590 R/h) |
| C. | 5.9 Gy/h (590,000 R/h) |
| D. | 0.00059 Gy/h (59 R/h) |
| Answer» D. 0.00059 Gy/h (59 R/h) | |
| 223. |
In steel, the velocity of sound is greatest in which of the following modes of vibration? |
| A. | Longitudinal |
| B. | Shear |
| C. | Surface wave |
| D. | Sound velocity is identical in all modes, in a given material |
| Answer» B. Shear | |
| 224. |
The primary form of energy conversion when an X ray tube is energized results in the production of: |
| A. | Primary X rays |
| B. | Secondary X ray |
| C. | Short wavelength X ray |
| D. | Heat |
| Answer» D. Heat | |
| 225. |
Two X ray machines operating at same nominal kilovoltage and milliamperage settings: |
| A. | Will produce the same intensities and energies of radiation |
| B. | Will produce the same intensities but produce different energies of radiation |
| C. | Will produce the same energies but may produce different intensities of radiation |
| D. | May give not only different intensities, but also different energies of radiation |
| Answer» E. | |
| 226. |
An ultrasonic technique in which two transducers are used, in a constant position relative to each other, is: |
| A. | Through transmission |
| B. | Contact testing |
| C. | Pulse echo |
| D. | Continuous wave |
| Answer» B. Contact testing | |
| 227. |
Which of the following cast materials could most likely be successfully ultrasonically tested? |
| A. | Low carbon steel |
| B. | Stainless steel |
| C. | Iron |
| D. | Pure lead |
| Answer» B. Stainless steel | |
| 228. |
A technique in which two transducers are used, one on each side of the test piece, is called: |
| A. | Angle beam testing |
| B. | Modified immersion testing |
| C. | Through transmission testing |
| D. | Twinning |
| Answer» D. Twinning | |
| 229. |
Which of the following transducer materials is the most efficient receiver of ultrasonic energy? |
| A. | Lead metaniobate |
| B. | Quartz |
| C. | Lithium sulfate |
| D. | Barium titanate |
| Answer» D. Barium titanate | |
| 230. |
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» B. Increase penetrating power | |
| 231. |
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» C. Increase penetrating power and radiation intensity | |
| 232. |
When the motion of the particles of a medium is transverse to the direction of propagation, the wave being transmitted is called a: |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | Lamb wave |
| Answer» C. Surface wave | |
| 233. |
The boundary between two different materials which are in contact with each other is called: |
| A. | A rarefactor |
| B. | A refractor |
| C. | An interface |
| D. | A marker |
| Answer» D. A marker | |
| 234. |
Which of the following materials of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance? |
| A. | A hand forging |
| B. | A coarse grained casting |
| C. | An extrusion |
| D. | The attenuation is equal in all materials |
| Answer» C. An extrusion | |
| 235. |
The velocity of surface waves is approximately shear waves in the same material. |
| A. | Two times |
| B. | Four times |
| C. | One half |
| D. | Nine-tenths |
| Answer» E. | |
| 236. |
When the motion of the particles of a medium is parallel to the direction of propagation, the wave being transmitted is called a: |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | Lamb wave |
| Answer» B. Shear wave | |
| 237. |
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» B. Determination of elastic properties of metallic products | |
| 238. |
Sound waves which travel on the surface of a solid in a manner similar to waves on a water surface are called: |
| A. | Rayleigh waves |
| B. | Shear waves |
| C. | Primary waves |
| D. | Compression waves |
| Answer» B. Shear waves | |
| 239. |
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» D. Beta rays | |
| 240. |
When comparing discontinuity echoes to equivalent flat bottom hole echoes in materials with similar impedance, surface finish and attenuation: |
| A. | The flaw is never larger than the flat bottom hole |
| B. | The flaw is never smaller than the flat bottom hole |
| C. | The flaw is always smaller than the flat bottom hole |
| D. | None of the above |
| Answer» E. | |
| 241. |
The longitudinal wave incident angle which results in formation of a rayleigh wave is called: |
| A. | Normal incidence |
| B. | The first critical angle |
| C. | The second critical angle |
| D. | Any angle above the first critical angle |
| Answer» D. Any angle above the first critical angle | |
| 242. |
The cable that connects the ultrasonic instrument to the search unit is specially designed so that one conductor is centred inside another. The technical name for such a cable is: |
| A. | BX cable |
| B. | Conduit |
| C. | Coaxial cable |
| D. | Ultrasonic conductor cable grade 20 |
| Answer» D. Ultrasonic conductor cable grade 20 | |
| 243. |
The second critical angle is defined as the longitudinal wave incident angle which results 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 | |
| 244. |
The echo on the cathode ray tube (CRT) which represents the far boundary of the material being tested is called: |
| A. | Hash |
| B. | The initial pulse |
| C. | The main bang |
| D. | The back wall echo |
| Answer» E. | |
| 245. |
How many decibels of attenuation correspond to an ultrasonic signal loss of from 100% to 25% on full screen height? |
| A. | 6 |
| B. | 10 |
| C. | 12 |
| D. | 14 |
| Answer» D. 14 | |
| 246. |
Typical frequencies which might be used to perform ultrasonic testing of concrete are: |
| A. | 25 to 100 kHz |
| B. | 200 to 5 MHz |
| C. | 1 MHz to 5 MHz |
| D. | 2.25 MHz to 10 MHz |
| Answer» B. 200 to 5 MHz | |
| 247. |
An indication which is formed when two pieces of magnetised steel come in contact with each other is called: |
| A. | A metallurgical discontinuity |
| B. | Magnetic writing |
| C. | Magnetic transfer |
| D. | A ferromagnetic notch |
| Answer» C. Magnetic transfer | |
| 248. |
When a longitudinal wave sound beam passes through an acoustic interface at some angle other than zero degrees: |
| A. | Surface waves are generated |
| B. | Plate waves are generated |
| C. | Reflection, refraction and mode conversion will occur |
| D. | The first critical angle is reached |
| Answer» D. The first critical angle is reached | |
| 249. |
An ultrasonic wave in which particle displacement is 90 degrees to the direction of wave propagation is called a: |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Compressional wave |
| D. | Plate wave |
| Answer» C. Compressional wave | |
| 250. |
Typical frequencies which might be used to perform ultrasonic testing of ferrous and non-ferrous welds are: |
| A. | 25 to 100 kHz |
| B. | 200 to 5 MHz |
| C. | 1 MHz to 5 MHz |
| D. | 2.25 MHz to 10 MHz |
| Answer» D. 2.25 MHz to 10 MHz | |