1. Which of the following is not necessarily a reason to machine a Brake Drum?
OA. Taper
OB. Minor Scoring
OC. Out-of-Roundness
OD. Pulsation
Grade/Exit

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

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)