Given the following equation and dBA levels: Legf24)= 10 log ((10(し1/10) + 10(L2/10) + etc + 10(L24))/24) dBA 12am - 1am 50 1am - 2am49 2am 3am 47 3am - 4am 47 4am - 5am 49 5am 6am 57 6am - 7am 64 7am - 8am 67 8am - 9am 65 9am 10 am 66 10am- 11am 64 11am 12pm 65 12pm 1pm 66 1pm 2pm 65 2pm - 3pm 64 3pm - 4pm 65 4pm - 5pm 66 5pm 6pm 66 6pm - 7pm 65 7pm - 8pm 62 8pm 9pm 60 9pm - 10pm 59 10pm 11pm 55 11pm 12am 53 Calculate the Leą 24hr) and the Ldp.

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?

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.