36. technician a says that whenever drum brake shoes are being replaced, the drum brake
hardware should be cleaned in a parts washer and re-used. technician b says that when installing
duo-servo brakes, the larger of the two shoes should be installed towards the front of the vehicle.
who is correct?

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

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)

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.