FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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Q True or False
1. PMM1 states that: there can be no machine which would continuously supply
mechanical work without some form of energy disappearing simultaneously.
2. The filling of a tank is an example of unsteady flow process.
3. For steam nozzle the change in potential energy is zero
4. In case of boiler the change in kinetic energy is zero.
5. For steady flow only interaction between system surroundings are work and heat.
6. Superheated steam behaves like a gas and therefore, it follows gas laws
7. Extensive properties do not depend on the mass of the system.
8. The change of internal energy for an isolated system is equal to heat and work.
9. With the use of centrifugal pump, the heat transfer is maximum.
10. For the flow in reciprocating compressor, the change in the kinetic energy is
maximum
Temperature is an extensive property. True or False? Explain.
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- Show Complete Solutionarrow_forward8.a. When a machine is tested, the volume of cooling air is 1250 cfm. If the temperature of the entering air is 25 C and the temperature of the outgoing air is 35 C, the loss in the machine isA. 7.1 kw.B. 24.8 kw.C. 12.5 kw.D. 17.7 kw. 8.b. When a motor is tested with a prony brake, the scale reading is 3.50 lb. The length of the brake arm is12 in. and its weight is 0.50 lb. If the motor speed is 1700 rpm and the power input is 1050 watts, themotor efficiency isA. 80.5%B. 69%C. 75%.D. 64.5%.arrow_forwardTRUE OR FALSE. THERMODYNAMICSarrow_forward
- COMPLETE SOLUTION PLS 4 DECIMAL PLACES COMPLETE SOLUTION PLS 4 DECIMAL PLACES COMPLETE SOLUTION PLS 4 DECIMAL PLACESarrow_forwardProblem Solving Read and analyze the problems thoroughly. Show your complete solution. BOX YOUR FINAL ANSWERS. Problem 1. In a steady flow apparatus, 135KJ of work is done by each kg of fluid. The specific volume of the fluid, pressure and speed at the inlet are 270 m/g, 500 kPa, and 4.88 fps. The inlet is 9.146 ft above the floor and the discharge pipe is at floor level. The discharge conditions are 600 m/gram, 1 bar and 82.32 fps. The total heat loss between the inlet and discharge is 9 Jig of fluid. In flowing through this apparatus, does the specific internal energy increase or decrease and by how much? Problem 2. Air flow steadily at the rate of 0.5 kg/s through an air compressor, entering at 7 mis speed, 1 bar pressure and 0.95 m/kg specific volume and leaving at 5 m/s, 7 bar and 0.19 m/kg. The internal energy of the air leaving is 90 J/g greater than that of the air entering. Cooling water in the compressor jackets absorbs heat from the air at the rate of 58 kw. Compute the work…arrow_forwardThe subject is Thermodynamics 1 1. Enumerate and explain the Four Fundamental Laws of Thermodynamics.arrow_forward
- Determine the output pressure of a compressor operating with the following data: a. Actual power required to drive the compressor is 20 kW. b. Overall efficiency of the compressor is 75%. c. Compressor delivers four standard m3/min. d. Compressor inlet pressure is 100 kPa abs.arrow_forwardEach of the following statements describes a way of coping with temperature variation. Which scenario most likely includes positive heat transfer through convection? That is, in which scenario does Hconvection most likely have a positive (+) sign? Hanimal = +SR + IRin – IRout +/- Hconvection +/- Hconduction - Hevaporation + Hmetabolic Select one: a. A rabbit basking in the sun early in the morning. b. A lizard resting in the shade in a hot desert in the middle of the day. c. A bumblebee vibrating its flight muscles before flight. d. A ground squirrel hibernating in the winter. e. A bird fluffing its feathers on a cold day.arrow_forwardHumpty-Dumpty with second law of thermodynamicsarrow_forward
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