Which of the following machine parts always require guards?
Select the 3 answer options that apply.

Fan blades

Levers

Rotating barrels

Abrasive wheel machinery

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)

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false