If the market value of a telecommunications share is $287.95, calculate the year-end dividends that it should be able to pay in perpetuity if money is worth 4.75% compounded semi-annually.

A building has a calculated cooling load of 10 tons, of which 2.5 tons is latent load. The space is to be maintained at 72 F db and 50 percent relative humidity. Ten percent by volume of the air supplied to the space is outdoor air at 100 F db and 50 percent relative humidity. The air supplied to the space cannot be less that 55 F db. Assume barometric pressure at sea level, and using the Psychrometric analysis software, find:

(a) The quantity of air supplied to the space in cfm,

(b) The amounts of return air and outdoor air in cfm,

(c) The conditions and volume flow rate of the air entering the cooling coil, point 1.

(d) The capacity and SHF for the cooling coil.

Attach your design report showing the psychrometric analysis of the problem and conditions of state points.

A closed rigid cylindrical vessel (internal diameter = 2 ft and internal height = 10 ft) has R-134a at x = 0.95 and 40 oF. The vessel is heated up to 100 oF. Assume that heat loss from the vessel is negligible. Kinetic and potential effects are negligible. Determine 1) the final pressure in psi [lbf/in2], 2) the mass of R-134a in lbm, 3) the heat transfer in Btu for this process and discuss its direction (if the heat is added to or rejected from the system), 4) the work transfer in Btu for this process and discuss its direction (if the work is done by or on the system), and 5) draw the process in T-v (temperature-specific volume) diagram.

For ethanol liquid with 50% excess of air. Determine adiabatic flame temperature

What are examples of the five properties associated with force?

1. Direction:

2. Orientation:

3. Magnitude:

4. Point of Application:

5. Line of action:

Why is the mechanical strength of the HAZ next to the fusion line of a heat treatable

       aluminum alloy much lower than that of the base metal?

Why does the mechanical strength of the HAZ of a heat treatable aluminum alloy increase

       with distance from the fusion line?

1. Summarize 3 important considerations in designing circuit.

2. Discuss the importance of pipe selection based on the important design consideration.

3. As a mechanical engineer, design a hydraulic circuit that has linear force output. This linear force can be done with one push button and retract when push button is released. Please consider a minimal usage of components in your design. Explain the operation based on directional control valve position. Use symbols in accordance to ISO 1219.

*Project Task

According to the valve adjustment diagram in gasoline engines, explain the following by stating on the figure. Intake valve opening, before 15o (top dead spot), Intake valve closing after 47o (bottom death spot), Exhaust valve opening before 41o (bottom death spot), Exhaust valve closing after 10o (top dead spot), Ignition advance before 15o (top dead spot)

1. Describe 3 different cases having corrosion by determining the material (the alloys with the codes and composition), describing the component having corrosion, the environment making corrosion to the component. You will give suggestions to the user that will solve the corrosion problem. However, there are some constraints that you need to check. - The reasons for the corrosion should be different for all cases. - The environment, the material, the component should be different for all situations. - The suggestions that solve the corrosion problem should be different for all situations. - There is no option for changing the material.

2. Write a question about composite materials and then solve the question. To do that follow the steps described below. - State the host material and fiber type. - State the composition of the composite material. - State type of fiber arrangement. - Give a reasonable modulus of elasticity for both of the materials. - State the cross-sectional area of the composite material. - State the direction of the fiber. - State the applied stress. After giving all these properties. -Compute the modulus of elasticity of the composite material. -Compute the loading carried by the fiber and the host material. -Compute the strain sustained by the fiber and the host material.

At the beginning of the compression process of an air-standard Otto cycle, p₁ = 1 bar and T₁ = 300 K. The compression ratio is 8.5 and the heat addition per unit mass of air is 1200 kJ/kg.


Determine:

(a) the maximum temperature of the cycle, in K.

(b) the net work, in kJ/kg.

(c) the percent thermal efficiency of the cycle.

(d) the mean effective pressure, in kPa.

Moist air at 55 oF dry bulb temperature and 40% relative humidity is first heated through a heating coil. The air is then adiabatically humidified by saturated water vapor at 4.5 psia. The exit air has a dry bulb temperature of 90 oF and wet bulb temperature 65 oF. Air is supplied at a volume flow rate of 478.5 cfm. Assume sea level pressure throughout. Determine the following.

a) Show the inlet and outlet air condition clearly on the psychrometric chart clearly marking them as 1 and 2 respectively.

b) Show the sensible heating process and humidification process on the psychrometric chart clearly marking them. Draw the overall process line.

c) Calculate the heat transfer rate of the heating coil. Show your calculation.

d) Calculate the mass flow rate of the water vapor. Show your calculation.

e) What is the SHF value? Show clearly how you obtained it.

1.Write the Bernoulli equation and state all the assumptions used in its derivation.

2.Write the vector form of the conservation of momentum equation for a control volume that is moving with a constant velocity.

3.) Water is flowing in a fire hose with a velocity of 1.0 m/s and a pressure of 200000 Pa. Use the Bernoulli equation to calculate the velocity of the water exiting the nozzle. Note: Derive the expression before plugging in numbers and clearly state all your assumptions.

4.Through a refinery, fuel ethanol is flowing in a pipe at a velocity of 1 m/s and a pressure of 101300 Pa. The refinery needs the ethanol to be at a pressure of 2 atm (202600 Pa) on a lower level. How far must the pipe drop in height in order to achieve this pressure? Assume the velocity does not change. (Hint: Use the Bernoulli equation. The density of ethanol is 789 kg/m3 ). Derive the expression before plugging in numbers.

An air-conditioning plant is designed to maintain a room at a condition of 20oC dry bulb and specific humidity 0.0079 when the outside condition is 30oC dry bulb and 40% percentage saturation and the corresponding heat gains are 18000 W (sensible) and 3600 (latent). The supply air contains one-third outside air by mass and the supply temperature is to be 15oC dry bulb. The plant consists of a mixing chamber for fresh and recirculated air, an air washer with chilled spray water with an efficiency of 80%, an after heater battery and supply fan. Neglecting temperature changes in fan and ducting, calculate:
a. The mass flow rat of supply air necessary;
b. The specific humidity of the supply air;
c. The cooling duty of the washer;
d. The heating duty of the after heater
(use the psychrometric chart assuming the barometric pressure is 1.001325 bar)

Composites:

1. Properties of a material that make it useful for engineering uses
2. Typical applications for the material
3. A brief discussion of how the material is produced
4. Advantages of the material in its typical uses
5. Disadvantages of the material in its typical uses & how design engineers overcome them