Two technicians are discussing oil and filter changes. Technician A says that there should be a gasket in place on a spin-on oil filter when removed, and if not, that you should make sure the gasket isn’t stuck to the engine mount. Technician B says that you loosen the oil-drain plug slowly using a screwdriver. Which technician is correct?
A. Technician A only
B. Both Technicians A and B
C. Neither Technician A nor B
D. Technician B only

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.