A window-mounted air conditioner supplies 19 m3/min of air at 15°C, 1 bar to a room. Air returns from the room to the evaporator of the unit at 22°C. The air conditioner operates at steady state on a vapor-compression refrigeration cycle with Refrigerant 22 entering the compressor at 4 bar, 10°C. Saturated liquid refrigerant at 11.5 bar leaves the condenser. The compressor has an isentropic efficiency of 70%, and refrigerant exits the compressor at 11.5 bar. Determine:

(a) the compressor power, in kW.

(b) the refrigeration capacity, in tons.

(c) the coefficient of performance.

What will be the shear force diagram and bending moment diagram for this question if the P is 4.0kN instead of 3.6kN?

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) Explain the difference between a direct and indirect observation. Provide an example of each not found in the “Error in Surveying” reading. What is the definition of an error? Why can we not calculate an exact error?

1. Write a dimension relationship for The period of oscillation T of a water surface wave that is assumed to be a function of density r , wavelength λ, depth h, gravity g, and surface tension σ . What will be the results if surface tension is negligible? Hint: Take λ, r, and g as repeating variables.

Provide the Introduction for the minor Project 1-Culvert Design. It should include at least the following information:

INTRODUCTION

A.General facts on culverts

B.Overview of Culverts

1.Shapes

1. Materials

2. Inlet types and selection

3. Considerations regarding Velocity at the culvert Outlet

4. Information regarding construction and culvert maintenance.

5. Culvert Hydraulic Programs.

Sketches and images to elucidate the information are also required

You are making a decision between three (3) competing bids for a new road construction. Describe and discuss the engineering decision making tools that you might employ to help you decide on the best proposal.

For the following situations, choose a modeling method and explain why you would use it.
a. Designing a prosthetic limb

b. Routing a piping system for a building

c. Designing a one-of-a-kind machined part

d. Verifying clearances for an electrical substation located near an airfield

e. Mapping an oil reservoir

Make a search about a materials used on engineering (Civil Engineering), the search must includes:
The type of materials which used to fabricate the device
The structure type
The composition
The function
The advantage
The disadvantage
The limitation of used
The problem in service
The new research on the field

1- There is mainly four kinds of behavior under stress which is Elastic, Plastic ,Viscous ,and Brittle: which of these behavior soil can be categorized ,Explain for each case:-
a)Elastic

b)Plastic

c)Viscous

d)Brittle

2-Soil Stress-Strain Behavior can be expressed by :-

a)Linear ELASTIC

b) NON Linear Elastic

c)Elasto-Plastic

d) Elastic Perfectly Plastic

Draw the Stress Strain Curve that describe each case; and mention the main characteristic of each curve.

A wing component on an aircraft is fabricated from an aluminum alloy that has a plane strain fracture toughness of 30 MPa (m) 1/2 . It has been determined that fracture results at a stress of 120 MPa when the maximum internal crack length is 8.4 mm. For this same component and alloy,

Compute the stress level at which fracture will occur for a critical internal crack length of 5.6 mm?

Design a steel flexural member that is continuously braces and 12 feet long. There is a uniformly distributed live load of 1 k/ft, and uniformly distributed dead load of 1 k/ft and a concentrated live load of 8.4 kips at a distance of 5 feet from the left support. use 36 ksi steel.

Ethics Class

Chapter 14 Discussion questions:

Discuss bioethics? Discuss health care professionals and patients & their families-rights & obligations. Discuss truth telling and informed consent. Discuss intercultural bioethics. Discuss ethical issues in medicine. Discuss human experimentation.

There are concrete structures and projects in the following, try to select the proper cement and explain the reason
1/Cast in place beam
2/The prefabricate parta conserved by autoclave method
3/Urgent salvaging projects or urgent military engineering
4/Mass concrete dam and the Foundation fpr large scale equipment
5/The underground Engineering that can be corroded by sulfate
6/The basis for blast furnace