Physics, 04.02.2020 02:58 HHHHHHHHHMMMMMMMMM
At the start of the compression stroke of a diesel cycle, the air pressure and temperature are 100 kpa, 27 °c. this diesel engine has a compression ratio of 20 and a cutoff ratio of 1.5. answer the following questions using cold-air standard analysis assumptions. a)-what is the temperature of the air at the start of the combustion (heat addition) process? a. 415 °c b. 523 oc c. 721 °c d. 805 °c
b)-what is the maximum cycle temperature? a. 1292 °c b. 1391 °c c. 1491 °c d. 1550 °c. c)-what is the thermal efficiency of this engine? a. 0.664 b. 0.670 c. 0.676 d. 0.684 d)-how much work is produced during the combustion (heat addition) process? a. 85.5 kj/kg b. 114 kj/kg c. 143 kj/kg d. 289 kj/kg. e)-what is the rate at which heat must be added to this engine if it is to produce 1 mw of power? a. 1.40 mw b. 1.46 mw c. 1.47 mw d. 1.49 mw
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Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm
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At the start of the compression stroke of a diesel cycle, the air pressure and temperature are 100 k...
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