ENTC 206 Lab Practical questions with verified solution 2023

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 Sand paper? - correct answer SiC powder What is a shiny finish bearing made of? - correct answer SiC What is a dull finish bearing made of? - correct answer Si3N4 What is safety glass made of? - correct answer PVB (polyvinylbutanal) What did acetone dissolve? - correct answer polystyrofoam What did water dissolve? - correct answer cornstarch foam Recycling Al cans is important because we can save ________ of energy to make Al from the recycled Al - correct answer 95% What is a tensile test? - correct answer a good measure of mechanical response of a plastic sample subjected to tensile loading How do you calculate young's modulus? - correct answer slope on graph - stress/strain What are the units of young's modulus? - correct answer MPa When tensile testing, the _________ required to move the specimen under a constant ________ is recorded - correct answer force, extension rate What are the units for Pascal (Pa)? - correct answer N/m^2 WHY the impact test? - correct answer the results can be used to compare materials relative toughness What is toughness? - correct answer resistance to fracture when a material is stressed