There is a metal plate with thickness, thermal conductivity, density, and specific heat of 10 mm, 200 w/m.°c, 2500 kgrn3, and 900 j/kg. k, respectively. it has an initial uniform temperature of 22°c and is being heated in an oven for 2 minutes. air in the oven is maintained at 900 c with convection heat transfer coefficient of 190 w/m. k. determine the temperature of the plate when it is removed from the oven.

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above