Engineering » Page 101

Jayce Christensen

Engineering

A balanced three phase load is supplied over a three-phase, 60 hz, transmission line with each line have a series impedance of (12.84 j72.76) ohms, the load voltage is 132 kV and the load power is 55 MVA at 0.8 lagging power factor. Determine: a. The ABCD parameters assuming a short line

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Engineering

Consider the flow past a 30-degree expansion corner. The upstream conditions are M1 = 2, P1 = 3 atm, and T1 = 400 K. Calculate the following downstream conditions: M2, P2, T2, T02, and P02.

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Engineering

Which of the following is required in order to make a protected left turn A. A left green arrow B. No oncoming traffic C. A left turn only lane D. A large enough gap

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Engineering

If the surface energy of a magnesium oxide - nickel oxide (MgO-NiO) solid solution is 1.05 J/m2 and its elastic modulus is 198 GPa, what is the maximum length of an internal elliptical flaw, in mm, if the ceramic part must survive an applied tensile stress of 27 MPa normal to this elliptical flaw

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Engineering

Concerned with the number of maintenance visits the rocket can undergo before being out of service, you have been informed that the recent statics show a that after the first journey to the outer space, the rocket was sent to service once, and after that the number of maintenance visits increase by 1 after every journey, for instance, after the second journey, the rocket had to go to service twice before being re-used, three-times after the 3rd use and so on.

A. Generate a rule for the number of visits to the maintenance department with respect to space journeys, is this rule arithmetic or geometric.

B. How many journeys will it take to for the number of service visits after a certain journey exceed 10?

C. The rocket is not to be re-used again if the total number of maintenance visits exceed 50, then how many journeys will a single rocket serve before being out of service?

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Engineering

How did Atlantis benefit from lessons learned in construction of earlier orbiters?

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Engineering

A cylindrical specimen of a metal alloy 48.0 mm long and 9.72 mm in diameter is stressed in tension. A true stress of 368 MPa causes the specimen to plastically elongate to a length of 53.5 mm. If it is known that the strain-hardening exponent for this alloy is 0.2, calculate the true stress (in MPa) necessary to plastically elongate a specimen of this same material from a length of 48.0 mm to a length of 57.4 mm.

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Engineering

If you're using the Chrome browser and a jа vascript application stops running due to an error in the jа vascript code, you can identify the statement that caused the error by

a. pressing F12, clicking on the link in the Sources panel, and reviewing the code in the Console panel

b. pressing F12, clicking on the link in the Console panel, and reviewing the code in the Sources panel

c. pressing F12 and reviewing the code in Console panel

d. pressing F12 and reviewing the code in the Sources panel

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Brenna Holloway

Engineering

An air-conditioning system operates at a total pressure of 95kPa and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100°C. Air enters the heating section at 10°C and 70% relative humidity at a rate of 35 m^3/min, and it leaves the humidifying section at 20°C and 60 percent relative humidity. Determine:

(a) the temperature and relative humidity of air when it leaves the heating section.

(b) the rate of heat transfer in the heating section.

(c) the rate at which water is added to the air in the humidifying section.

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Engineering

Change in cross-section dimensions over the length of a U-shaped bracket can best be shown in a space-saving way by

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Engineering

For high temperature deformation, the bigger the gran sine, the higher the creep rate. a) - True b) - False

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Engineering

What is conductive thread?

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Engineering

Speed bumps are commonly used

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Engineering

The animation shows the circuit inside a speaker. The speaker cone vibrates as the current changes direction. This creates sound waves. Explain how the electromagnet causes movement back and forth as the electric current changes.

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Adelaide Buckley

Engineering

he major difficulty in designing line graphs (a) - lies in selecting the appropriate color to shade each line (b) - lies in properly choosing the spacing for each axis (c) - lies in making sure that more than three data lines are not separated by visible space (d) - lies in properly placing the independent variable and the dependent variable

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