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In an air-standard Otto cycle engine, the following data were obtained: k = 1.4, cp = 1.0045₂ = 0.7175 P₁ = 103 kPa, t₁ = 26°C, t₂ = 414°C, t = 2527°C, kg-K t₁ = 945.8°C. To be done: a. Find the compression ratio r. A. 6.5 B. 7 C. 7.5 D. 8.0 E. None of these b. Find the pressure at the end of the compression stroke P2. A. 1804 kPa B. 1894 kPa C. 1994 kPa D. 2004 kPa c. Find the pressure at the end of heat addition. A. 7700 kPa B. 7719 kPa C. 8019 kPa D. 8800 kPa E. None of these

In an air-standard Otto cycle engine, the following data were obtained: k = 1.4, cp = 1.0045₂ = 0.7175 P₁ = 103 kPa, t₁ = 26°C, t₂ = 414°C, t = 2527°C, kg-K t₁ = 945.8°C. To be done: a. Find the compression ratio r. A. 6.5 B. 7 C. 7.5 D. 8.0 E. None of these b. Find the pressure at the end of the compression stroke P2. A. 1804 kPa B. 1894 kPa C. 1994 kPa D. 2004 kPa c. Find the pressure at the end of heat addition. A. 7700 kPa B. 7719 kPa C. 8019 kPa D. 8800 kPa E. None of these

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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COMBUSTION ENGINEERING In an air-standard Otto cycle engine, the following data were obtained: k = 1.4 , C, = 1.0045 ,C, = 0.7175 , P1 = 103 kPa , t, = 26°C, t2 = 414°C, tz = 2527°C, kgK kg-K t4 = 945.8°C. To be done: a. Find the compression ratio r. A. 6,5 В. 7 C. 7.5 D. 8.0 E. None of these b. Find the pressure at the end of the compression stroke p2. А. 1804 КРа В. 1894 КРа С. 1994 КPа D. 2004 КРа c. Find the pressure at the end of heat addition. A. 7700 kPa B. 7719 kPa C. 8019 kPa D. 8800 kPa E. None of these d. Find the pressure at the end of the expansion stroke P4. A. 410 kPa В. 420 kPa C. 8019 kPa D. 460 kPa E. None of these e. Find the Heat added qa to the cycle, in kJ/kg air. A. 1615 kJ/kg C. 1555 kJ/kg E. None of these B. 1575 kJ/kg D. 1516 kJ/kg f. Find the work of the cycle wey, in kJ/kg air. A. 866.1- kg air B. 877.1 k) kg air C. 880.2- D. 900- E. None of these kg air E. None of these kg air Page 1 of 2 g. Calculate the cycle efficiency for the cycle, in percent. A. Ncy = 52.57 % B. ncy = 56.47 % C. ney = 56.03 % D. ny y = 54.08 % h. Find the Theoretical mean effective pressure Tmen, in kPa. А. 1274 kPа В. 1174 КРа С. 1074 КРа D. 974 КРа Е. None of these i. Solve for the per cent clearance A. 18.18% B. 16.67% C. 14.28% D. 15.38% E. None of these kJ j. Find the entropy change for the process 2-3, in kg-K" B. -1.298 C. 1.008 D. -1.008 E. None of these
Transcribed Image Text:COMBUSTION ENGINEERING In an air-standard Otto cycle engine, the following data were obtained: k = 1.4 , C, = 1.0045 ,C, = 0.7175 , P1 = 103 kPa , t, = 26°C, t2 = 414°C, tz = 2527°C, kgK kg-K t4 = 945.8°C. To be done: a. Find the compression ratio r. A. 6,5 В. 7 C. 7.5 D. 8.0 E. None of these b. Find the pressure at the end of the compression stroke p2. А. 1804 КРа В. 1894 КРа С. 1994 КPа D. 2004 КРа c. Find the pressure at the end of heat addition. A. 7700 kPa B. 7719 kPa C. 8019 kPa D. 8800 kPa E. None of these d. Find the pressure at the end of the expansion stroke P4. A. 410 kPa В. 420 kPa C. 8019 kPa D. 460 kPa E. None of these e. Find the Heat added qa to the cycle, in kJ/kg air. A. 1615 kJ/kg C. 1555 kJ/kg E. None of these B. 1575 kJ/kg D. 1516 kJ/kg f. Find the work of the cycle wey, in kJ/kg air. A. 866.1- kg air B. 877.1 k) kg air C. 880.2- D. 900- E. None of these kg air E. None of these kg air Page 1 of 2 g. Calculate the cycle efficiency for the cycle, in percent. A. Ncy = 52.57 % B. ncy = 56.47 % C. ney = 56.03 % D. ny y = 54.08 % h. Find the Theoretical mean effective pressure Tmen, in kPa. А. 1274 kPа В. 1174 КРа С. 1074 КРа D. 974 КРа Е. None of these i. Solve for the per cent clearance A. 18.18% B. 16.67% C. 14.28% D. 15.38% E. None of these kJ j. Find the entropy change for the process 2-3, in kg-K" B. -1.298 C. 1.008 D. -1.008 E. None of these
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