Engineering Answers

5. A steam condenser receives 10 kg/s of steam with an enthalpy of 2570 KJ/kg. steam condenses into a liquid and leaves with an enthalpy of 160 KJ/kg. Cooling water, passes through the condenser with temperature increases from 13 degrees C to 24 degrees C. Calculate the water flow in kg/s.

4. Steam is delivered to turbine at 5.4 Mpa and 600℃. Before condensation at 31℃, steam is extracted for feedwater heating at 0.6 Mpa. For an ideal regenerative cycle, find the thermal efficiency.

3. In an ideal reheat cycle, the steam throttled condition is 8 Mpa and 480℃. The steam is then reheated to 2 Mpa and 460℃. If turbine exhaust is 60℃, determine cycle efficiency.

2. A Rankine cycle has an initial mass of liquid flowing at 10 kg at 75℃. If final enthalpy is 379.6 KJ, find the change of the system.

1. 150 grams of water at 75℃ is heated at constant pressure. The water is completely vaporized, what is the heat added?

Describe the composition , physical properties and mettods of fabrication , and uses of acid resistant brick

Discuss four alternatives that increase the use and application of conventional concrete.

What are the advantages of using a third-point loading flexure test over a

center-point loading flexure test? Draw a shear force diagram and a bending

moment diagram for each case to support your answer.

What is the purpose of performing the flexure test on concrete? How are the

results of this test related to the compressive strength test results?

What is the standard size of PCC specimens to be tested for compressive

strength? If a smaller size is used, which size is expected to provide higher

compressive strengths? Why? Which size provides strengths close to that of

an actual concrete structure?