iPad 1130 PMM 42 Prelab 2 Attempt 1 QUESTION 5 1 points Sav

iPad 11:30 PMM 42% . Prelab 2: Attempt 1 QUESTION 5 1 points Save Answer A strain gauge measures the measurement through the use of a gauge factor in its coiled wires and converts it to a strain A. 0 B, resistance ° C. current voltage D. strain QUESTION 6 1 points Save Answer It is important to properly prepare a surface before attaching a strain gauge to ensure that the strain in the material is transferred to the strain gauge. Which of the following is not a required step in preparing the surface. OA Burnishing of Layout Lines OB. Degreasing C. Preparing the leadwire D.Abrading OE Neutralizing QUESTION 7 1 points Save Answer What is the modulus of rigidity for polycarbonate in ksi? QUESTION 8 1 points Save Answer It is important that their are voids between the strain gauge and the specimen. O True False Click Save and Submit to save and submit. Click Save All Answers to save all answers Save All Answers

Solution

5)Ans. B-resistance.

Strain gage measures strain by converting a change in length of the thin foil conductive path to a slight change in electrical resistance. The change in resistance is proportional to the change in length of the gage.

6) answer C.

Preparation of surface include solvent degreasing, surface abrading, gage location layout lines, surface conditioning and neutralization. It does not include preparation of leadwire.

7)Gp of polycarbonate is 0.33X10^3 ksi

8) True, It is important that there are voids between strain gauge and the specimen.