Engineering Commons^™

The Electrochemical Oxidation Of Cholesteryl Acetate Dibromide, Abraham Cooper

Dissertations

Cholesteryl Acetate Dibromide was dissolved in carbon tetrachloride, suspended with mixing in 4.5 molar solution of sulfuric acid and electrolyzed at a lead dioxide anode. The anodically prepared film of lead dioxide, when maintained at potentials (relative to a calomel electrode) above 1.5 volts, was a catalyst for the oxidation. A new and mild oxidation took place at the catalytic electrode surface that resulted in attack on the tertiary hydrogen atom at the 25 carbon. The mildness of the oxidation prevented the decomposition of the unconverted raw material and permitted the recovery of up to 96% of the cholesteryl acetate …

Current-Potential Effects Of Trace Impurities In Manganese Electrowinning, George Robert Ferment

Dissertations

The purpose of this investigation was to study the effects of trace metallic impurities, found in manganese electro-winning solutions, on cathode current-potential curves.

This investigation led to the development of a novel analytical tool, emphasizing polarization curves as a means of detecting trace metallic impurities in manganese sulfate electrolytes. The method possesses two distinguishing features: (a) it uses the competing hydrogen evolution reaction as a means of detecting metallic impurities, and (b) it enables one to establish if the electrolyte is sufficiently pure for efficient electrolysis.

Nine metallic impurities were studied, consisting of: nickel, cobalt, silver, copper, zinc, molybdenum, cadmium, …

Effect Of Particle Size And Particle Size Distribution On The Burning Rate Of Barium Chromate-Boron Pyrotechnic Delay Compositions, Donald J. Freeman

Theses

The burning rate of barium chromate-boron delay compositions is shown to be related to the 10 percent particle size point on the particle size distribution curve (particle size vs. percent greater than size) for either of the components. The burning rate is also shown to be inversely proportional to the 10 percent point of the barium chromate; and to follow a hyperbolic type relationship with the 10 percent of the boron, decreasing asymptotically as the 10 percent point increases. No correlations were found between the burning rate of the compositions and the average particle diameter, the mean particle diameter, or …

Investigation Of The Octene-Decane-Urea Adduct Equilibrium System, Frederick Charles Guest

Theses

Concentrations of equilibrium mixtures formed by adding increments of octene to a solution of urea in methanol to form adduct are reported.

Calorimetric studies indicate that the addition of octene to a urea-methanol solution shows an endothermic heat effect prior to the formation of solid adduct. The heat effect becomes exothermic as solid adduct is formed.

Addition of decane to an equilibrium octene-urea adduct system increased octene concentration in the supernatent liquid, indicating an octene release from the original adduct as decane adduct was formed.

The order in which decane and octene were added to form the decane-octene-urea adduct system …

Cation Exchange Between Solutions Of Ferric Nitrate And Dowex 50x-8 Resin, Michael H. Mansky

Theses

The rate of exchange of ferric ions from solutions of ferric nitrate and hydrogen ions from Dowex 50X-8 has been studied in an agitated bed ion exchange column over a range of bed loading conditions. Agitation has been maintained in a regime known to indicate film diffusion control of rate in small scale batch reactors.

Calculated diffusion coefficients for the column are slightly higher than those determined in the batch reactor because of greater turbulence of agitation in the column.

The assumption of previous investigators concerning linearity of equilibrium data has been found to be invalid for the system studied. …

Factors Affecting The Biodegradation Of Linear Alkylbenzene Sulfonates In River Die-Away Studies, Neil M. Mchugh

Theses

The determining factors in the biodegradation of linear alkylbenzene sulfonates have been investigated using the river die-away technique. Emphasis was placed on finding the correlation between biodegradability and each of the following: surfactant structure, inoculation of basic water medium with activated sludge, and acclimation of bacteria to a given surfactant. It has been shown that the lower the molecular weight of linear alkylate, down to C8, the faster the rate of biodegradation. It was further shown that there is no direct relationship between phenyl position distribution and biodegradability, nor is there any direct correlation between the amount of surfactant remaining …

Use Of Gas Chromatography To Determine The Mutual Solubility Of Water And Toluene, John Orshich

Theses

The possibility of determining the water traces in water saturated toluene as well as the traces of toluene in toluene saturated water by means of gas chromatography was investigated.

A 15 feet long, 1/4 inch copper column, attached to F & M Chromatograph 500, was used; the column was packed with 5 Armeen SB on Haloport F (Teflon).

The determination of toluene in toluene saturated water did not appear to be feasible, since the retention time for toluene with the used column was too short to allow the base line of the recorder to become steady at the attenuation value …

Activity Coefficient For Infinite Dilute Solution By Gas-Liquid Chromotography, Suresh Jivabhai Patel

Theses

Gas-liquid partition chromatography has been used to determine the activity coefficient for very dilute solutions of solute in non-volatile solvents.

Other, more classical methods of determining the activity coefficient are laborious and are neither as accurtate nor as precise as desired.

The systems studied were:

(1) Benzene-Dinonyl Phthalate

(2) Cyclohexane-Dinonyl Phthalate

(3) Benzene-Squalane

(4) Cyclohexane-Squalane

All systems were studied over the column temperature range of 50° to 110°C with constant pressure and sample size. A study was also made on the effect of column pressure at constant temperature and sample size. One system was studied with variable sample size but …

Heat Transfer To Non-Newtonian Fluids In Turbulent Flow, Donald S. Smalley, George Vassil

Theses

An investigation of the heat transfer characteristics of non-Newtonian solutions in turbulent flow is presented. The range of flow behavior indices (n) was examined from 0.69 to 0.88. The consistency index (K) was investigated over the range of 0.00008 to 0.002 lbsf x sec^n'/ft². The Reynolds number varied between 2200 to 25,000.

Two methods of correlating film coefficients which have been previously developed were examined. Improvement in the reliability of correlation is demonstrated by modifications proposed in this work.

Brittle Fracture Of Carbon Steel, Ronald Robert Stang

Theses

This thesis is a report on the research and engineering efforts made, since 1957, to further define the causes and means for the prevention of catastrophic brittle fracture of carbon steels at ambient temperatures. All of the data based on the literature published from 1958 to 1965 has been critically examined and correlated.

Included are discussions of the factors affecting brittle fracture and the tests used to predict resistance Of steels to brittle fracture. Correlations of tests with actual service performance and relationships between tests are discussed. A review and critical evaluation of present day steel specifications as they affect …

The Thermal Conductivity With Vapor Pressure For N-Paraffin Hydrocarbons, Jacob Tolsma

Theses

A literature search of the thermal conductivity of pure liquids has been made and experimental values have been compiled. Study of the theory of the thermal conductivity of liquids indicated that a relationship exists between thermal conductivity and viscosity. Previous investigations have found an almost linear relationship between the logarithms of viscosity and vapor pressure for n-paraffin hydrocarbons. In this investigation the logarithm of thermal conductivity plotted versus the logarithm of vapor pressure for the same series was also found to be almost linear. The equation of the line when combined with a linearized Antoine equation in terms of the …

A Study Of Emulsion Viscosities, Frederick R. Cummings

Theses

The apparent viscosity of stable emulsions has been measured and evaluated. The systems studied consisted of various oil in water emulsions, utilizing a series of six n-paraffins from heptane to octadecane. The system was stabilized with a conventional emulsifying agent. The apparent viscosity of these emulsions was studied in relation to (a) the concentration of the disperse phase and, (b) the viscosity of the hydrocarbon used as the continuous phase.

It was established that the volume concentration of the disperse phase had considerable effect on the apparent viscosity of the emulsion. An increase in the concentration of the disperse phase …

The Effect Of Column Diameter On The Efficiency Of Packed Fractioning Towers, William Lintner

Theses

The object of this work was to study the effect of packed column diameter on the fractionation efficiency so that a more reliable engineering approach could be employed in the scaling up of fractionating columns.

The height equivalent to a theoretical plate (HETP) was employed to compare column efficiencies in this study. The HETP was calculated for several gas mass velocities through columns of one-inch, two-inch and three-inch diameter, packed with one-quarter inch Berl saddles. All data were collected at total reflux conditions employing the standard n-heptane-methylcyclohexane binary.

The results indicated that the efficiencies of the one-inch and two-inch diameter …

Test 905: Nuffield 10 / 42 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 904: Allis-Chalmers Series Ii D-21 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 902: David Brown 880 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 903: David Brown 990 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Effects Of Cold-Forming On Light-Gage Steel Members, Kenneth W. Karren, George Winter

CCFSS Library (1939 - present)

Cold-forming may cause significant increases in tensile and in compressive yield strength in both the corner and flat elements of light-gage cold-formed steel members. The cumulative effects may raise the yield strength to as reuch as 70% above the virgin yield strength of the as-rolled sheet steel. The yield strength of corners is always considerably higher than that of any other portion of a cold-formed member because of the large plastic deformations which take place in the corners. Thus compact members with a large ratio of corner area to cross sectional area will have the largest increases in yield strength. …

Fifth Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes

Kentucky Transportation Center Research Report

For many years, engineers have sought a simplified method for determining the strength requirements for underground conduits under various conditions of bedding and backfilling. Methods of installation and the general lack of a uniform design criteria tended to restrict the usefulness of rigid pipe culverts. With the advent of the interstate construction program and the increased mileage of highways meeting high design standards, the number of pipe culverts installed under high fills was significantly increased. This, of course, accented even more so the need for a more straightforward criteria for design and installation of rigid pipe in order that maximum …

Residual Stresses And The Bauschinger Effect, Raymond M. Huebner

Theses and Dissertations

Within the last ten years there has been much interest in the field of elasto-plastic behavior of engineering materials. Hie recent popularity of the low-cost light-weight plastically designed structures has added a great deal of impetus to this interest. This thesis deals with one of the aspects of elasto-plastic behavior, namely, the distribution of the residual stresses in a simple member which has been plastically deformed in tension and/or compression,. In particular, an attempt has been made to relate these residual stresses to the well-known but little understood Bauschinger effect.

Graphical Solutions To Frequently Encountered Fluid Flow Problems, Roland W. Jeppson

Reports

Introduction

Graphical methods are often used by engineers to solve frequently used or complex formulas which require trial and error solutions. Perhaps the best known graphical tool used by the engineer is the slide rule, but anyone familiar with its use will recognize its limitations both in time and accuracy. For many problems which involve many repetitive computations high speed digital or analog computers are the most effective tools for solution. There are, however, many problems requiring considerable engineering time for slide rule solutions where solutions are not justifiable on computers. The use of nomograms for such problems is desirable. …

An Investigation Of The Need To Correlate Academic Subject Areas With Industrial Arts, Ernest James Boedcher

Graduate Student Research Papers

This study was initiated as a result of a need that became apparent in two industrial arts seminars at Central Washington State College. Studies reveal that industrial arts teachers use principles, laws, and applications of mathematics and science daily, but these are seldom recognized and made meaningful to the students. As a result of this study industrial arts teachers may see a way to use this material to initiate similar situations in their teaching.

Handbook Of Facts And Figures On Indiana County Roads—Including Directory Of Indiana County Highway Departments, Jean E. Hittle

Indiana Local Technical Assistance Program (LTAP) Publications

This handbook will assist county road officials in the planning of county road operations. The data and information included in this handbook are either statistical or public information which are already available from the official sources, but which needed to be brought together for convenient distribution and use.

The Irish Plumbing And Heating Engineer, June 1965 (Complete Issue)

Building Services Engineering

No abstract provided.

Residual Stress Distribution Changes During Dynamic Unidirectional Tensile Loading, Henry Swan Todd

Theses and Dissertations

In recent years there has been much engineering effort channeled toward obtaining higher strength, lower weight and cost product designs. In pursuit of this goal some carefully designed and tested parts have catastrophically failed after a long history of repeated successful service, even though the load at the time of failure was no higher than the part had repeatedly carried previously. These mechanical failures are commonly classified as fatigue failures.

Experimental Investigation Of Free Field Conditions In Tanks To Be Used In Interaction Studies, Clark P. Sanger

Civil Engineering ETDs

Experiments to determine the effects of boundary friction losses on static and dynamic vertical stress transmission and to determine the stress-strain relationship of standard 20-30 Ottawa sand in 8-inch-I.D. tanks to be used in burial structure interaction studies are presented. In these tests the tank height, boundary condition, sand density, and overpressure rise time were varied. The use of a greased rubber membrane proved to be a reliable method of minimizing the boundary friction losses thus creating a strain field that was independent of the tank height. Vertical stress transmission was not affected by the overpressure load rate. The stress-strain …

The Rimo Filter, Richard Thomas Modafferi

Theses

Up to the present time, there has existed no general method for obtaining the pole locations of minimum-phase constant time delay filters of desired selectivity. Since constant time delay filters are necessary for low distortion FM transmission, and minimum-phase filters are easy to construct and align, a general method for locating the poles of minimum-phase constant time delay filters would be of considerable importance. Presented in this paper is a procedure for locating the poles of minimum-phase constant time delay filters of desired selectivity, using a FORTRAN digital computer program. Two experimental FM receivers were built to test. the new …

An Investigation Of The Mechanism Controlling The Co-Deposition Of Aluminas With Copper During Electrodeposition Of Copper, James Edward Hoffmann

Theses

Experimental work was undertaken to determine the mechanism controlling the co-deposition of aluminas with copper during electrode-position of copper. The aluminas were present in the copper plating electrolytes as an insoluble disperse phase.

Three possible mechanisms for co-deposition of aluminas were studied, They were mechanical inclusion, electrophoretic deposition, and adsorption.

The results of experimental studies established that mechanical inclusion was not a significant factor in the mechanism controlling co-deposition of aluminas with copper.

Theoretical considerations of the compositions of the copper plating electrolytes indicated that co-deposition of aluminas by an electrophoretic mechanism was highly unlikely. The conclusions arrived at by …

Planning And Scheduling Software Programs With Pert, Henry E. Mielo

Theses

The use of the Program Evaluation and Review Technique (PERT) in planning and scheduling software programs was discussed in this thesis. A real world program, referred to as the Wrap-Around Simulation or WAS Project, was selected to illustrate that complex efforts in the software domain can respond favorably to modern planning and scheduling techniques

The WAS Project included the provision of a digital simulation of the shipboard environment in which a Digital Fire Control Computer (DFCC) would operate as part of a Digital Fire Control System. The digital simulation afforded a well controlled and conclusive checkout of the operational program …

Electrolytic Polishing Of Copper And Nickel Silver, Halle Abrams

Theses

To facilitate the study of surface conditions on ultrasonic weldability, electrolytic polishing was used to obtain four types of surfaces on copper and nickel silver (alloy D). A500 orthophosphoric acid bath was used, and the necessary operating conditions to obtain these surfaces were established. In accordance with current electrolytic polishing theory, the existence of the anode viscous layer and anode surface film was observed, and their role in the polishing process is discussed. By means of metallurgical techniques and surface profile measurements, it is shown that the four types of surfaces are significantly different, and good reproducibility of these surfaces …