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.
| 301. |
Which of the following is an advantage of using a focused transducer? |
| A. | The useful range of the transducer is decreased |
| B. | The useful range of the transducer is increased |
| C. | Sensitivity to the effects of a rough surface is increased |
| D. | Greater sensitivity is achieved in the transducer's useable range |
| Answer» E. | |
| 302. |
Static marks on radiographic film are caused by: |
| A. | An improperly grounded X ray tube |
| B. | Scratches on the lead screens |
| C. | Poor film handling technique |
| D. | Old film |
| Answer» D. Old film | |
| 303. |
Which of the following represents ultraviolet light of wavelengths which arepotentially injurious (1 Å = 10-10m) |
| A. | 2000 to 3200Å |
| B. | 3200 to 4000 Å |
| C. | 4000 to 4600Å |
| D. | 4600 to 5200 Å |
| Answer» B. 3200 to 4000 Å | |
| 304. |
A silver nitrate spot test might be used to: |
| A. | Check for archival film quality |
| B. | Check for out of date film |
| C. | Check for single versus double emulsion film |
| D. | Any of the above |
| Answer» B. Check for out of date film | |
| 305. |
Which of the following represent types of radiation stemming from radioactive decay : |
| A. | Alpha, beta, gamma |
| B. | Alpha, gamma, delta |
| C. | X, rho, sigma |
| D. | Sigma, gamma, beta |
| Answer» B. Alpha, gamma, delta | |
| 306. |
Which of the following is an advantage of contact testing over immersion? |
| A. | Ability to maintain uniform coupling on rough surface |
| B. | Longer dead time near the front surface of the test piece |
| C. | Ease of field use |
| D. | Ability to continuously vary incident wave angle during test |
| Answer» D. Ability to continuously vary incident wave angle during test | |
| 307. |
Which statement is true when related to magnetic lines of force? |
| A. | They never cross |
| B. | They are most dense at the poles of a magnet |
| C. | They seek the path of least resistance |
| D. | All of the above |
| Answer» E. | |
| 308. |
The boundary between two different materials which are in contact with each other iscalled: |
| A. | A rarefactor |
| B. | A refractor |
| C. | An interface |
| D. | A marker |
| Answer» D. A marker | |
| 309. |
To produce the sharpest image, which of the following should be true? |
| A. | The radiographic source should be small |
| B. | The radiographic source should be as close as possible to the test piece |
| C. | The planes of the test piece and the film should be at oblique angles to each other |
| D. | All of the above |
| Answer» B. The radiographic source should be as close as possible to the test piece | |
| 310. |
A test piece with large differences in thickness would have: |
| A. | High film contrast |
| B. | High subject contrast |
| C. | Low subject contrast |
| D. | Low film contrast |
| Answer» C. Low subject contrast | |
| 311. |
Which of the following is the least efficient receiver of ultrasonic Energy? |
| A. | Quartz |
| B. | Lithium sulphate |
| C. | Lead metaniobate |
| D. | Barium titanate |
| Answer» E. | |
| 312. |
What is a disadvantage of using the fluorescent penetrant process? |
| A. | Lower visibility of indications |
| B. | Must be performed in a darkened area with aid of a UV lamp |
| C. | Easily washed with water |
| D. | High visibility of indications |
| Answer» C. Easily washed with water | |
| 313. |
Loss of the test piece back wall echo during scanning may be caused by: |
| A. | An abnormally homogeneous material structure |
| B. | A smooth entry surface on the test piece |
| C. | A discontinuity which is not parallel to the entry surface |
| D. | An opposite surface which is parallel to the entry surface |
| Answer» D. An opposite surface which is parallel to the entry surface | |
| 314. |
Which of the following developers is applied before the drying operation? |
| A. | Dry |
| B. | Non-aqueous wet |
| C. | Water based wet |
| D. | None of the above |
| Answer» D. None of the above | |
| 315. |
An effect of a thick developer coating might be: |
| A. | To obscure discontinuity indications |
| B. | To enhance discontinuity indications |
| C. | To increase penetrant test sensitivity by providing more capillary paths |
| D. | None of the above |
| Answer» B. To enhance discontinuity indications | |
| 316. |
An ultrasonic display which shows echo locations and amplitude is called: |
| A. | A scan |
| B. | B scan |
| C. | C scan |
| D. | Orthogonal view |
| Answer» B. B scan | |
| 317. |
In general, which of the following materials would have the least ultrasonicattenuation? |
| A. | Aluminium |
| B. | Silver |
| C. | Lead |
| D. | Tungsten |
| Answer» B. Silver | |
| 318. |
A change in which the following parameters would require a new X ray exposurechart? |
| A. | kV |
| B. | X ray machine |
| C. | Test piece thickness |
| D. | All of the above |
| Answer» C. Test piece thickness | |
| 319. |
Spurious indications may be caused by which of the following? |
| A. | Test piece edges |
| B. | Mode conversions |
| C. | Multiple reflections from a single interface |
| D. | All of the above |
| Answer» E. | |
| 320. |
AA test method employing two seperate search units on opposite surfaces of thematerial being tested is called: |
| A. | Contact testing |
| B. | Surface wave testing |
| C. | Through-transmission testing |
| D. | Lamb wave testing |
| Answer» D. Lamb wave testing | |
| 321. |
Which of the following transducer materials is the most efficient receiver ofultrasonic energy? |
| A. | Lead metaniobate |
| B. | Quartz |
| C. | Lithium sulfate |
| D. | Barium titanate |
| Answer» D. Barium titanate | |
| 322. |
The permeability of a material describes: |
| A. | The ease with which it can be magnetized |
| B. | The depth of the magnetic field in the part |
| C. | The length of time required to demagnetise it |
| D. | The ability to retain the magnetic field |
| Answer» B. The depth of the magnetic field in the part | |
| 323. |
Variation in acoustic velocity from one type of steel to another is usually less than: |
| A. | 1% |
| B. | 2% |
| C. | 5% |
| D. | 10% |
| Answer» B. 2% | |
| 324. |
Wet magnetic particle bath strength is checked by which of the following? |
| A. | Specific gravity |
| B. | Optical density |
| C. | Settling test |
| D. | None of the above |
| Answer» D. None of the above | |
| 325. |
Snell's law is used to calculate: |
| A. | Angle of beam divergence |
| B. | Angle of diffraction |
| C. | Angle of refraction |
| D. | None of the above |
| Answer» D. None of the above | |
| 326. |
Explain the difference between X and gamma rays: |
| A. | They are both types of electromagnetic radiation |
| B. | X rays are naturally occurring; gamma rays are man made |
| C. | X rays are produced electrically; gamma rays are emitted by disintegrating atomic nuclei |
| D. | There is no difference |
| Answer» D. There is no difference | |
| 327. |
A wheel transducer is normally considered: |
| A. | A contact method |
| B. | A dynamic scanning method |
| C. | An immersion method |
| D. | A static scanning method |
| Answer» D. A static scanning method | |
| 328. |
Scatter radiation: |
| A. | Is not controllable |
| B. | Is controllable to some extent, but cannot be completely eliminated |
| C. | Can be eliminated completely by changing the kV |
| D. | Can be eliminated completely by using lead intensifying screens |
| Answer» C. Can be eliminated completely by changing the kV | |
| 329. |
One half value layer of lead for Cobalt-60 is approximately: |
| A. | 12 mm |
| B. | 6 mm |
| C. | 2 mm |
| D. | 25 mm |
| Answer» B. 6 mm | |
| 330. |
A large source size can be compensated for by: |
| A. | Increasing source-to-specimen distance |
| B. | Addition of lead screens |
| C. | Increasing specimen-to-film distance |
| D. | Increasing penumbra |
| Answer» B. Addition of lead screens | |
| 331. |
Sound waves which travel on the surface of a solid in a manner similar to waves on awater surface are called: |
| A. | Rayleigh waves |
| B. | Shear waves |
| C. | Primary waves |
| D. | Compression waves |
| Answer» B. Shear waves | |
| 332. |
The portion of a test piece which is represented by the CRT screen area from zero tothe rightmost edge of the initial pulse is called: |
| A. | The dead zone |
| B. | The near field |
| C. | The near zone |
| D. | The far zone |
| Answer» C. The near zone | |
| 333. |
A disadvantage of using a high frequency ultrasonic transducer is: |
| A. | It provides a smaller beam angle and better resolving power |
| B. | It provides a larger beam angle and poorer resolving power |
| C. | It is scattered more by coarse grained material |
| D. | It is scattered less by coarse grained material |
| Answer» D. It is scattered less by coarse grained material | |
| 334. |
One of the most common applications of ultrasonic tests employing shear waves isthe: |
| 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 | |
| 335. |
The approximate radiographic equivalence factors for steel and copper at 220 kV are 1.0 and 1.4 respectively. If it is desirable to radiograph a 1.27 cm (0.5 inch) piece of copper, what thickness of steel would require about the same exposure characteristics? |
| A. | 1.78 cm (0.7 inches) |
| B. | 0.9 cm (0.35 inches) |
| C. | 3.55 cm (1.4 inches) |
| D. | 2.54 cm (1.0 inch) |
| Answer» B. 0.9 cm (0.35 inches) | |
| 336. |
Cracks, lack of penetration, lack of fusion which are surface breaking on a weldedaluminium plate which has been liquid penetrant tested will show as: |
| A. | Linear indications |
| B. | Rounded indications |
| C. | Square indications |
| D. | Triangular indications |
| Answer» D. Triangular indications | |
| 337. |
AA display which shows the initial pulse and the front surface echo superimposedwould be considered: |
| A. | An immersion test |
| B. | An A scan |
| C. | A contact test |
| D. | A B scan |
| Answer» C. A contact test | |
| 338. |
An internal rupture caused by working steel at improper temperatures is called a: |
| A. | Lap |
| B. | Cold shut |
| C. | Forging burst |
| D. | Slag inclusion |
| Answer» D. Slag inclusion | |
| 339. |
The most common source of DC current for magnetic particle testing is: |
| A. | Motor generators |
| B. | Rectified AC |
| C. | Storage batteries |
| D. | None of the above |
| Answer» C. Storage batteries | |
| 340. |
Which of the following chemical elements are normally held to a minimum in liquidpenetrant materials when testing nickel based alloys? |
| A. | Sulphur |
| B. | Oxygen |
| C. | Carbon |
| D. | Nitrogen |
| Answer» B. Oxygen | |
| 341. |
The most significant advantage of the visible solvent removable penetrant process is? |
| A. | Its suitability for penetrant testing of article with rough surfaces |
| B. | Portability |
| C. | Its non-corrosive properties |
| D. | Ability to allow retest |
| Answer» C. Its non-corrosive properties | |
| 342. |
According to ASTM E709-95 direct current electromagnetic yokes should have a liftingforce of at least: |
| A. | 15 kg |
| B. | 16 kg |
| C. | 17 kg |
| D. | 18 kg |
| Answer» E. | |
| 343. |
Dual purpose penetrants are viewed under what type of light? |
| A. | White light |
| B. | Black light |
| C. | Both a and b |
| D. | None of the above |
| Answer» D. None of the above | |
| 344. |
The ultrasonic test method in which finger damping is most effective in locating adiscontinuity is: |
| A. | Shear wave |
| B. | Longitudinal wave |
| C. | Surface wave |
| D. | Compression wave |
| Answer» D. Compression wave | |
| 345. |
Which of the following would be considered application(s) of ultrasonic testing? |
| A. | Determination of a material’s elastic modulus |
| B. | Study of a material’s metallurgical structure |
| C. | Measurement of a material’s thickness |
| D. | All of the above |
| Answer» E. | |
| 346. |
Which of the following describes the shape of particles used for dry magnetic particletesting? |
| A. | Spherical |
| B. | Angular |
| C. | Elongated |
| D. | Mixture of elongated and globular |
| Answer» E. | |
| 347. |
During ultrasonic testing by the immersion method, it is frequently necessary to angulate the search unit when a discontinuity is located at an angle in order to: |
| A. | Avoid a large number of back reflections that could interfere with a normal test pattern |
| B. | Obtain a maximum response if the discontinuity is not originally oriented perpendicular to the ultrasonic beam |
| C. | Obtain a discontinuity indication of the same height as the indication from the flat bottomed hole in a reference block |
| D. | Obtain the maximum number of entry surface reflections |
| Answer» C. Obtain a discontinuity indication of the same height as the indication from the flat bottomed hole in a reference block | |
| 348. |
Actual emulsification times are determined by: |
| A. | Experiment, during technique qualification |
| B. | Manufacturer's recommendations |
| C. | Code requirements |
| D. | None of the above |
| Answer» B. Manufacturer's recommendations | |
| 349. |
Cracks which are caused by alternating stresses above a critical level are called: |
| A. | Stress corrosion cracks |
| B. | Cycling cracks |
| C. | Critical cracks |
| D. | Fatigue cracks |
| Answer» E. | |
| 350. |
The reverse magnetising force necessary to remove a residual magnetic field from atest piece after it has been magnetically saturated is called: |
| A. | Hysteresis |
| B. | Coercive force |
| C. | Demagnetising flux |
| D. | Reverse saturation |
| Answer» C. Demagnetising flux | |