Answer: understanding blueprints and technical documents.
using specialized tools to test products
Explanation:
The options are:
a. understanding blueprints and technical documents
b. being physically fit to be able to crawl through tight spaces
c. using specialized tools to test products
d. using creativity to design interesting products
e. being charming with trainees.
Quality control inspectors are the people who check the material's or products quality for a company. Their job is to make sure that products meet normal standards. They run tests, remove bad products or those with defects, etc.
Based on the explanation above, the two skills or abilities that are important for John to have to be a successful quality control inspector include:
• understanding blueprints and technical documents.
• using specialized tools to test products