Non-destructive testers and inspectors operate ultrasonic, liquid penetrant, magnetic particle, and other testing equipment to detect defects in objects of different compositions/materials.
Engineering inspectors and regulatory officers inspect aircraft, boats, ships, cars and trucks, weighing/measuring devices, industrial instruments, processes, and equipment.
Inspectors in public health, environmental health, and occupational health and safety inspect restaurants, plants, hotels, water systems, and workplaces.
Construction inspectors inspect the construction/maintenance of buildings, bridges, highways, and industrial construction.