Technician a says that obd-ii systems include generic as well as vehicle

manufacturer's specific diagnostic trouble codes (dtcs) and scan data displays,

technician b says that obd-ii systems have common dtcs. who is correct?

o a. technician b

o b. technician a

o c. neither technician a nor b

o d. both technicians a and b

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0