Entc test 2 - Study guides, Class notes & Summaries

ENTC 281 test 2

ENTC 281 test 2

ENTC 281 test 2A highly toxic, colorless, odorless gas is named - correct answer CO Carbon monoxide. Combustible liquids are those with flash points at or above - correct answer 38C Name three natural materials that may be more toxic than plastics. - correct answer Cobalt, nickel, silica. Silk, wood, wool. Name three broad categories of hazards in working with industrial materials. - correct answer Biomechanical Hazards Chemical Hazards Physical Hazards The overheating of ? pl...

Entc 206- Test 2Polymer - correct answer is a substance composed of molecules with large molecular mass made up of repeating structural units, or monomers, connected by covalent chemical bonds. Synthetic - correct answer describing a substance that has been made artificially thru chemical synthesis; one that does not come from a natural source. Synthetic Polymers - correct answer Fiber, Plastics, Elastomers (or Rubber), protective Coating, Adhesives. What raw material are polymers ma...

ENTC 206 Lab PracticalASTM - correct answer American Society for Testing and Materials ISO - correct answer International Organization for Standardization What is a resistor made of? - correct answer Al2O3 + metal or metal oxide layer What is a knife/peeler made of? - correct answer Al2O3 or (SiC or Si3N4) What is aerogel? - correct answer good thermal insulator What is an ignitor? - correct answer made of Si3N4 or SiC high electrical conductivity at high temp. What is S...

ENTC 206 Test #1endurance limit - correct answer stress level that fatigue failure will not occur below hardness - correct answer measure of a material's resistance to penetration tensile test - correct answer standard testing method used to generate the stress-strain relationship creep - correct answer continued plastic deformation under a constant load and more prominently with elevated temperature; material may stretch & eventually fail at an applied stress BELOW its yield strength;...

ENTC 207 Lab FinalTensile Testing Steps - correct answer 1. Place specimen in tester 2. Apply tensile load until sample breaks 3. During loading measure tensile load and length at intervals 4. Measure length after sample breaks 5. Calculations Stress - correct answer force / cross section area Y-axis psi Strain - correct answer (final length- original length) / original length X- axis in/in Modulus of elasticity - correct answer -Stress/strain (straight part of graph) -measure ...