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Carter Velasquez

Engineering

A 7.5-ft-long solid steel shaft (G = 11.2 x 106 psi) is to transmit 15 hp at a speed of 1500 rpm. The shaft is limited to an allowable shearing stress of 4.5 ksi and an allowable angle of twist of 4 degrees.

Determine:

a. The power transmitted by the steel shaft in units of in-lb/sec.

b. The corresponding torque for the steel shaft in units of in-lb.

c. The required diameter of the shaft (Show all units in your calculations).

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Engineering

An oil reservoir has a average porosity of 20%, an area of 100 acres, and a av - erage thickness of 10 feet. The connate water saturation is 25% and the resid ual oil saturation is 35%. No gas is present.

a. Calculate the recovery factor for the oil reservoir.

b. Calculate the volume of oil which may be recovered per acre-ft of reser voir Calculate the bulk volume of the reservoir in units of acre-ft.

c. Calculate the total volume of oil in cubic feet which may be recovered from the entire reservoir

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Engineering

Martensitic transformations only occur in the Fe-C system. ___ Certain materials can age harden at room temperature. ___ Pure metals can be age hardened. ___ Tempering of martensitic steel increases its ductility. ___ Over-aging can occur when the aging temperature is large enough such that incoherent precipitates form.

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Engineering

What is the function of engineers?

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Engineering

Write a program that reads characters from the standard input to end-of-file. For each character, have the program report whether it is a letter. If it is a letter, also report its numerical location in the alphabet. For example, c and C would both be letter 3. Incorporate a function that takes a character as an argument and returns the numerical location if the character is a letter and that returns - 1 otherwise.

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Engineering

In designing a fixed-incline self-acting thrust pad when the width of the pad is much larger than the length, it is of interest to know the magnitude and location of the maximum pressure. The viscosity of the lubricant is 0.05 N-s/m2, the sliding velocity is 10 m/s, the pad length is 0.3 m, the minimum film thickness is 15  m, and the inlet film thickness is twice the outlet film thickness.

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Engineering

Describe the term Coefficient of Performance (COP) in relation to heating or cooling cyclic systems.

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Engineering

Sed is a multipurpose tool that combines the work of several filters. sed performs noninteractive operations on a data stream. sed has a host of features that allow you ti select lines and run instructions on them.

True

False

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Engineering

6. Employers can implement updated

to improve employee safety.

A)

Administrative processes

B)

Engineering controls

C)

Work practices

D)

All of the above

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Desmond Livingston

Engineering

Flue gases from an incinerator are released to atmosphere using a stack that is 0.6 m in diameter and 10.0 m high. The outer surface of the stack is at 40°C and the surrounding air is at 10°C. Determine the rate of heat transfer from the stack, assuming

(a) there is no wind and

(b) the stack is exposed to 20 km/h winds.

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Engineering

If you are sampling a 50Hz signal, what is the minimum sampling rate necessary to prevent aliasing? Why?

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Engineering

What type of engineers would work on a hyperloop?

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Engineering

Which of the following quenching materials is LEAST severe in its quenching action (slowest cooling) ? a. Air b. Brine c. Oil d. Water

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Engineering

What is the density of a substance that has a mass of 14gm and has a volume of 42cm^3

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Engineering

Compare the ten values of strain obtained while loading the beam to those obtained during unloading. Discuss why differences may have occurred. Are these differences acceptable?

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