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Q: Which of the following is used to detect cracks and flaws in metal blocks?
  • A. Reverberation
  • B. Ultrasound
  • C. Echo
  • D. Sound Navigation and Ranging
Correct Answer: Option B - Ultrasounds can be used to detect the defects in the metal blocks. It is used to detect the cracks and flaws in metal blocks. Metallic blocks are generally used in construction of big structures like buildings, bridges, machines etc. There might be cracks or holes inside the metal blocks.
B. Ultrasounds can be used to detect the defects in the metal blocks. It is used to detect the cracks and flaws in metal blocks. Metallic blocks are generally used in construction of big structures like buildings, bridges, machines etc. There might be cracks or holes inside the metal blocks.

Explanations:

Ultrasounds can be used to detect the defects in the metal blocks. It is used to detect the cracks and flaws in metal blocks. Metallic blocks are generally used in construction of big structures like buildings, bridges, machines etc. There might be cracks or holes inside the metal blocks.