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Processes and Production 9
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Select the type of friction that has positive effects on machine operation.A. friction between threaded fastener and material B. friction between gears resulting in heat build-up C. friction between skis and snow surface D. friction between swimwear and water
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What is the resistance between surfaces contacting each other?A. surface tension B. friction C. surface area D. tension resistance
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Kinetic friction is ______ friction.A. sliding B. static C. stationary D. unstable
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Friction causes machines to ______ productive power and heat moving parts.A. increase B. lose C. create D. stop
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How can friction in machines be reduced?A. make sure all parts are aligned B. replace worn parts C. all of the above D. adding lubrication
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liquid lubricants like oil are the ______ and best known types of lubricant.A. most versatile B. most rare C. least versatile D. most expensive
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Engineers and techs strive for 100% efficiency to use less______ and generate less heat.A. energy B. fuel C. waste D. time
Processes and Production 9 (Answer Key)
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Select the type of friction that has positive effects on machine operation.A. friction between threaded fastener and material B. friction between gears resulting in heat build-up C. friction between skis and snow surface D. friction between swimwear and water
-
What is the resistance between surfaces contacting each other?A. surface tension B. friction C. surface area D. tension resistance
-
Kinetic friction is ______ friction.A. sliding B. static C. stationary D. unstable
-
Friction causes machines to ______ productive power and heat moving parts.A. increase B. lose C. create D. stop
-
How can friction in machines be reduced?A. make sure all parts are aligned B. replace worn parts C. all of the above D. adding lubrication
-
liquid lubricants like oil are the ______ and best known types of lubricant.A. most versatile B. most rare C. least versatile D. most expensive
-
Engineers and techs strive for 100% efficiency to use less______ and generate less heat.A. energy B. fuel C. waste D. time
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