Carefully store and handle measuring instruments to:

• A. Widen the measurement range
• B. Improve measurement speed
• C. Increase weight
• D. Protect the integrity of the instrument

Answer: (D)

Keeping measuring instruments in good condition preserves their accuracy and reliability. When you store and handle them properly, you protect sensitive measurement surfaces, calibration references, and internal mechanisms from dust, moisture, corrosion, and accidental damage, all of which can cause drift or misalignment. A calibrated tool can lose its zero or become out of true if it’s bumped, exposed to harsh temperatures, or stored loosely; a padded case, proper racks, and controlled environments help maintain calibration and readability. Handling with care—cleaning before storage, using protective caps, avoiding rough contact, and returning the tool to its designated place—helps ensure the instrument’s integrity over time. This is the reason the focus is on protecting the instrument’s integrity. The other options don’t reflect the goal of careful storage and handling: they don’t widen the measurement range, speed up measurements, or change the instrument’s weight.