Search
A reheat-regenerative engine receives steam at 207 bar and 59.3 °C, expanding it to 38.6 bar, 343°C. At this point the steam passes through a reheater and reenters the turbine at 34.5 bar. 593°C, hence expands to 9 bar, 492°C, at which point the steam is bled for feedwater heating. Exhaust occurs at 0.07 bar. Beginning at the throttle (point 1) enthalpies are known (in kJ/kg).
An ideal reheat turbine with one-stage of reheat receives steam at 8.0 MPa, 480 °C. Reheat pressure is 0.83 MPa and exhaust pressure is 0.007 MPa. The work is 1559 kJ/kg and the thermal efficiency is 41.05%. Find the temperature of the steam leaving the reheater.
Expand 2 kg of steam at 15 bar, 320°C, into the wet region to 100°C in a polytropic process where pv1.21 = C. Determine (a) y2, (b) ΔH, (c) ΔS, (d) nonflow and steady flow work, and (e) Q.
QUESTION 1: (14 marks)
(a) For a self-bias circuit, the transistor is a silicon device, RE =200Ω, R1=10R2=10kΩ,
RC=2kΩ, β=100 and VCC= 15V. Determine the values of ICQ and VCEQ. (8 marks)
3. In incremental launching method of bridge construction, what are the measures adopted to enhance sufficient resistance of the superstructure during the launching process?
2. What is “preset” during installation of bridge bearings?
1. Under what situation shall engineers use jacking at one end only and from both ends in prestressing work?
1. Find the distance from the point (2,3) to the line 3x + 4y + 9 = 0.
2. Find the distance between the given line 4x – 3y = 12 and 4x – 3y + 8 = 0. lines.
A rigid tank contains air at 1.5 bar and 600C. The pressure of air is raised
to 2.5 bar by transfer if heat from a constant temperature reservoir at
4000C. The temperature of the surroundings is 270C. Determine per kg of
air, the loss of available energy due to heat transfer.
#339914 on Dec 2023