एक इंजन आदर्श ऑटो चक्र पर कार्य करता हुआ माना जाता है, जिसमें संपीडन की शुरुआत और अंत में तापमान 27 डिग्री सेल्सियस और 327 डिग्री सेल्सियस है। इंजन की वायु-मानक दक्षता है:

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RRB JE ME 22 Apr 2025 Shift 2 CBT 2 Official Paper
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  1. 87%
  2. 78%
  3. 60%
  4. 50%

Answer (Detailed Solution Below)

Option 4 : 50%
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सिद्धांत:

एक आदर्श ऑटो चक्र में, यदि समदैसिक संपीडन की शुरुआत और अंत में तापमान ज्ञात हैं, तो वायु-मानक दक्षता है:

\( \eta = 1 - \frac{T_1}{T_2} \)

दिया गया है:

  • प्रारंभिक तापमान, \(T_1 = 27^\circ C = 300~K\)
  • अंतिम तापमान, \(T_2 = 327^\circ C = 600~K\)

गणना:

\( \eta = 1 - \frac{300}{600} = 0.5 = 50\% \)

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