The following problem description applies also to the next two problems.

A piston-cylinder device contains 2 kg of a saturated liquid mixture at an initial state 1 with p₁= 100 kPa and x₁= 0.8. The water is heated at constant pressure until its final state 2 with volume V₂ = 1.947V₁.

Its initial volume, in m³/kg, is closer to:

A) 3.836

B) 1.294

C) 2.990

D) 2.345

E) 2.156

F) 2.711

G) 4.625

H)1.736

B) Its final temperature, in ^oC, is closer to:

C) The amount of heat supplied to the steam during the expansion process, in kJ, is closer to:

an insulating wall 16cm thick has one face at 600 degree celsius while the other is at 100 degree celcius. The thermal conductivity of the material is given by K =0.078(1+17.95*10 exponent - 4) W/mK ant T is in degree celcius temperatures is 60 degree celcius determine the heat flow for a length of 5m. also find the mid layer temperature

1. Calculate relative frequencies for; Overall Type of Calls, Call Quality and Call Errors.
2. Calculate the following probabilities:
   • CLM Error and AM Shift
   • COV Error and PM Shift
   • SAV Error or AM Shift
   • Given that the call comes in the morning, what is the probability of a CLM Error
3. NARRATIVE: Based upon the probabilities in step 2, which error(s) should the company focus on for improvement? Should they direct their attention to a particular shift?
4. If a sample size of 15 is used and we assume calls are either correct we can model the call quality using a binomial distribution. Based upon the probability of an error (provided in the Quality Summary under Call Quality), predict the probability of:
   • Exactly 0 errors occurring in 15 calls
   • Less than 2 errors occurring in 15 calls
   • 5 or more errors occurring in 15 calls
5. Provide Descriptive Statistics for Call Time to include; Mean, Standard Deviation and the 5-number summary.
6. Using the Call Time Mean and Standard Deviation from the Quality Sample, find the probability of a call time less than 7 minutes, between 7 and 9 minutes, and greater than 9 minutes.
7. NARRATIVE: From past research the company knows that customers expect to have their calls handled without error and within approximately 7.5 minutes on the phone. Use the information from steps 4-6 to evaluate how well the company is meeting these expectations.

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.