Power Engineering 4th Class - A2 Questions and Answers Rated A+

Power Engineering 4th Class - A2 Questions and Answers Rated A+ Convert -6°C to °F. (-6°C × 9/5) + 32 = 21.2°F a. 30.4°F b. 28.5°F c. 21.2°F d. 18.6°F e. 16.7°F c Convert 6°F to °C. (6°F − 32) × 5/9 = -14.44°C a. 30.4°C b. 28.5°C c. -14.4°C d. 18.6°C e. -16.7°C c How much heat must be supplied to 200 kg of water at 20°C to make steam at 850 kPa abs and 87% dry? a. 2039.4 kJ b. 407 880 kJ c. 1774.28 kJ d. 424 627.98 kJ e. 484 507.6 kJ e A cylindrical tank 0.5 m in diameter and 4 m long is filled with water at 15°C. Find the quantity of heat required to raise the water to 71°C. (Use specific heat of water = 4.2 kJ/kg/°C.) a. 120 000 kJ b. 150 000 kJ c. 165 000 kJ d. 178 527 kJ e. 184 726 kJ e How much heat must be absorbed by 63 kg of ice at 0°C to convert it to saturated steam at 100°C. Specific heat of water is 4.2 kJ/kg K. Latent heat of fusion of ice is 335 kJ/kg. Latent heat of evaporation of steam is 2257 kJ/kg. a. 35 490 kJ b. 21 775 kJ c. 53 107 kJ d. 189 756 kJ e. 273 097 kJ d How many kJ of heat will be required to convert 65 kg of water at 15°C into saturated steam at 650 kPa abs ? a. 2697.31 b. 2760.3 c. 62.99 d. 282 329.29 e. 175 325 e How much heat is in 20 kg of 80% dry steam at 2250 kPa abs? a. 48 573 kJ b. 55 653 kJ c. 2781.7 kJ d. 33,241 kJ e. 1.1335 MJ