Processes and Production 9

Question or Hint Answer or Word

Select the type of friction that has positive effects on machine operation. friction between threaded fastener and material (wrong answers: friction between gears resulting in heat build-up, friction between skis and snow surface, friction between swimwear and water)
What is the resistance between surfaces contacting each other? friction (wrong answers: surface tension, surface area, tension resistance )
Kinetic friction is ______ friction. sliding (wrong answers: static, stationary, unstable)
Friction causes machines to ______ productive power and heat moving parts. lose (wrong answers: increase, create, stop)
How can friction in machines be reduced? all of the above (wrong answers: make sure all parts are aligned, replace worn parts, adding lubrication)
liquid lubricants like oil are the ______ and best known types of lubricant. most versatile (wrong answers: most rare, least versatile, most expensive)
Engineers and techs strive for 100% efficiency to use less______ and generate less heat. energy (wrong answers: fuel, waste, time )