For your reference
( P = \frac2\pi N T60 ) → ( T = \frac100 \times 10^3 \times 602\pi \times 500 = 1909.86 , Nm ) Torsion equation: ( \tau_max = \frac16T\pi d^3 ) → ( 40 \times 10^6 = \frac16 \times 1909.86\pi d^3 ) ( d^3 = \frac16 \times 1909.86\pi \times 40 \times 10^6 = 2.43 \times 10^-4 , m^3 ) ( d = 0.0624 , m = 62.4 , mm ) → Select next safe size, e.g., 65 mm. mechanical engineering questions and answers pdf
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Carnot efficiency = ( 1 - \fracT_LT_H = 1 - \frac300800 = 0.625 ) (62.5%) Actual efficiency = ( 1 - \fracQ_outQ_in = 1 - \frac6001000 = 0.40 ) (40%) Since actual efficiency (40%) < Carnot efficiency (62.5%), the engine is possible but not reversible. If actual efficiency exceeded Carnot, it would violate Kelvin-Planck statement. For your reference ( P = \frac2\pi N
Mechanical Engineering is a broad discipline encompassing thermodynamics, mechanics, manufacturing, and design. Due to the high volume of concepts and formulas, condensed Q&A formats in PDF (Portable Document Format) have become a standard study aid. These documents serve two primary purposes: rapid revision of theoretical concepts and practice for multiple-choice questions (MCQs) commonly found in exams. m^3 ) ( d = 0.0624