4. Technician A says that Non-Serviceable bearings should be lubricated when brake repair work is done. Technician B says that if a Non-Serviceable
bearing is defective, the entire bearing assembly should be replaced. Who is correct?
A. Technician A only
B. Technician B only
C. Both Technician A and B
OD. Neither Technician A nor B

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?