Measuring resistance to detect damage is useful because it:

  1. needs the bridge to be closed for months
  2. is quick and doesn't need the bridge to be broken open
  3. requires removing the concrete
  4. needs X-ray equipment
Answer

B) is quick and doesn't need the bridge to be broken open

Non-destructive testing. SLO P-09-E-27 · Understanding

Physics MCQ · More Current Electricity MCQs · Practise