Describe the type(s) of calibration equipment you have experience with.
This is a specific technical question related to your mastery of and exposure to the technical knowledge, skills, and abilities related to your craft. Try to think of calibration equipment you've utilized (pneumatic and electronic, wobulator, frequency generator) and what your experience is with each.
"I've used two devices to calibrate equipment. I used a Wobulator to check and calibrate accelerometers, velocity transducers, and proximity probes. It had a motor-driven wobble plate and ran on compressed air. I've also used an electronic frequency generator to find the frequency."