Q1: For the following structures: 1. Draw shear force and bending moment diagrams after solving the structures in dear
steps (points of zero-moment and zero-shear).
2- Find vertical displacements and rotations at the points (B) and (C) after removing the
vertical redundant Reaction at point B in the first step.
* Consider EI =1 in all calculations.
|
20 KN
А
10 kN/m
B
2
C
0.5 m
1.5 m
1 m
40.5 m/
*
(a)
4 KN
6 KN
3 kN/m
B
A
C
A
*
3m
3m
3m
X
X X
X
(b)

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.