MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Concrete Technology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The interference field near the face of a transducer is often referred to as the ______________ |
| A. | Fresnel zone |
| B. | Acoustic impedance |
| C. | Exponential field |
| D. | Phasing zone |
| Answer» B. Acoustic impedance | |
| 2. |
A second name for compression wave is __________ |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | Lamb wave |
| Answer» E. | |
| 3. |
When the motion of the particles of a medium are at right angles to the direction of wave motion, the wave being transmitted is called a ___________ |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | Lamb wave |
| Answer» B. Shear wave | |
| 4. |
A discontinuity that occurs during the casting of molten metal which may be caused by the splashing, surging, interrupted pouring is ___________ |
| A. | Burst |
| B. | Cold shut |
| C. | Flaking |
| D. | Blow hole |
| Answer» C. Flaking | |
| 5. |
A_SECOND_NAME_FOR_COMPRESSION_WAVE_IS___________?$ |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | Lamb wave |
| Answer» E. | |
| 6. |
The_interference_field_near_the_face_of_a_transducer_is_often_referred_to_as_the_______________$ |
| A. | Fresnel zone |
| B. | Acoustic impedance |
| C. | Exponential field |
| D. | Phasing zone |
| Answer» B. Acoustic impedance | |
| 7. |
When the motion of the particles of a medium are at right angles to the direction of wave motion, the wave being transmitted is called a __________? |
| A. | Longitudinal wave |
| B. | Shear wave |
| C. | Surface wave |
| D. | Lamb wave |
| Answer» B. Shear wave | |
| 8. |
A discontinuity that occurs during the casting of molten metal which may be caused by the splashing, surging, interrupted pouring is |
| A. | |
| B. | Burst |
| C. | Cold shut |
| Answer» C. Cold shut | |
| 9. |
The number of cylces per second is the definition of ____________ |
| A. | Wave speed |
| B. | Frequency |
| C. | Hertz |
| D. | Velocity |
| Answer» D. Velocity | |
| 10. |
Mechanical pulse having an oscillation frequency in range of `_____________ |
| A. | 30 kHz to 40 kHz |
| B. | 40 kHz to 50 kHz |
| C. | 50 kHz to 60 kHz |
| D. | 60 kHz to 70 kHz |
| Answer» C. 50 kHz to 60 kHz | |
| 11. |
Slower velocities may indicate ___________ |
| A. | Good quality and continuity of the material |
| B. | Good quality and discontinuity of the material |
| C. | Bad quality and continuity of the material |
| D. | Concrete with many voids |
| Answer» E. | |
| 12. |
Higher velocities indicate __________ |
| A. | Good quality and continuity of the material |
| B. | Bad quality and continuity of the material |
| C. | Concrete with many cracks |
| D. | Concrete with many voids |
| Answer» B. Bad quality and continuity of the material | |
| 13. |
In this test, the strength and quality of concrete or rock is assessed by measuring the ___ of an ultrasonic pulse. |
| A. | Length |
| B. | Velocity |
| C. | Weight |
| D. | Surface Tension |
| Answer» C. Weight | |
| 14. |
An ultrasonic pulse velocity test is an _____________ |
| A. | Ex-situ, nondestructive test |
| B. | In-situ, nondestructive test |
| C. | Ex-situ, destructive test |
| D. | In-situ, destructive test |
| Answer» C. Ex-situ, destructive test | |