What should always be done before beginning any diagnosis? A. Test drive
B. Change the oil filters
C. Fill out a diagnostic worksheet
D. Verify the customer concern

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

What is creep? what is stress relaxation?

Determine (a) the maximum thermal efficiency of reversible power cycles operating between a hot reservoir at 1000°c and a cold reservoir at 200°c and (b) the maximum cops for reversible refrigeration and heat pump cycies, respectively, between 28°c and 14°c.