View source for Electrical Engineering Orientation/Chemical Science Processes

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{{center top}}Wikiversity [[Topic:Electrical Engineering|Electrical]] &  [[Topic:Electronic Engineering|Electronic]] Engineering Schools<br>The Lessons in<br>ELECTRICAL/ELECTRONIC ENGINEERING ORIENTATION{{center bottom}}

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== '''Important Notes & Instructions on Answering the questions''' ==
*The multiple choice questions are meant to test overall knowledge and literacy on basic elementary Chemistry. Indepth Chemistry required for a particular Engineering field will be dealt with during undergraduate studies.

*Only SI units are used in this questionaire

*Select the most correct answer of the four possible answers to each question.
*Attempt all questions before submitting to view your results.
*Use of calculator allowed.
<br>

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{{Electrical Engineering Orientation Courses Content}}

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<div style="border-bottom:1px solid Gold; background-color:#ffffaa; padding:0.2em 0.5em 0.2em 0.5em; font-size:110%; font-weight:bold;">Science Aptitude test2: Questionaire</div>
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From above periodic table of elements, amongst other supplied detail of each element, is the Electronegativity strength indication. Which of the following statement correctly defines Electronegativity? 
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+ (A)  A measure of the tendency of an atom to attract a bonding pair of electrons.
- (B)  A measure of the atomic Electrical potential.
- (C)  Electronegativity of an atom is related to it's mass.
- (D)  None of the above.

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According to the Period table in question 1, Fluorine (F) is the most Electronegative element at 4.0. this means that... 
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- (A)  Fluorine forms only polar bonds.
+ (B)  The bonding pair of electrons will be closer to the fluorine atom in a chemical bonding involving other atoms except another Fluorine atom.
- (C)  Fluorine forms only Pure-covalent bonds.
- (D)  Fluorine only forms ionic bonds.

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Uranium is mainly used in nuclear power stations to produce electricity. Enriched <sup>235</sup>'''U''' is preferred to <sup>238</sup>'''U''' in nuclear reactors. Which of the following statements is true about <sup>235</sup>'''U''' & <sup>238</sup>'''U'''?
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- (A)  <sup>235</sup>'''U''' is more toxic than <sup>238</sup>'''U'''.
- (B)  <sup>235</sup>'''U''' is cheaper than <sup>238</sup>'''U'''.
- (C)  <sup>238</sup>'''U''' does not react in nuclear fission.
+ (D)  <sup>235</sup>'''U''' is an Isotope of <sup>238</sup>'''U'''.

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As an industrial application,a Zinc (Zn) layer is used to cover Iron (Fe) Hulls of big ocean liners. Which of the following statements is true about this application?
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+ (A)  Zinc protects Iron from corrosion by Oxidation.
- (B)  Zinc decreases building cost as it is cheaper than Iron.
- (C)  Zinc decreases the total weight as it is lighter than Iron.
- (D)  None of the above.

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The following diagram shows a standard Zinc/Iron Electrochemical Cell.
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Which electrode is a cathode in the above diagram?
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- (A)  Zinc (Zn) electrode.
+ (B)  Iron (Fe) electrode.
- (C)  both.
- (D)  none of the above.

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Consider the following reaction of Hydrogen gas with Iodine gas to form Hydrogen Iodide gas, being at equilibrium.
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The pressure is then increased at time t in the container at a constant temperature of 400°C?
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Which of the following graphs represent the change in concentration of the three gases as a result of compression?
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- (A)
- (B) 
- (C) 
+ (D)  

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The melting point of two solids X and Y are 940°C and 925°C respectively. At temperature of 900°C, X conducts electricity but Y doesn't. At 950°C both conduct electricity. X & Y could be...
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+ (A)  X: Metallic Solid    ; Y: Ionic Solid
- (B)  X: Mollecular Solid  ; Y: Metallic Solid
- (C)  X: Ionic Solid       ; Y: Mollecular Solid
- (D)  X: Mollecular Solid  ; Y: Ionic Solid

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The complete combustion of an alkane can be represented as follows:
 alkane + O<sub>2</sub> <math>\to </math> X + Y 
The products X and Y are ...
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- (A)  X: Carbon        ; Y: Water.
+ (B)  X: Carbon dioxide ; Y: Water.
- (C)  X: alkene        ; Y: Carbon dioxide.
- (D)  X: alkyne        ; Y: Water.

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The volume of a certain mass of gas is 150dm<sup>3</sup>. The pressure of the gas is then halved at constant temperature. The volume of the gas will now be ...
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- (A)  75dm<sup>3</sup>.
- (B)  150dm<sup>3</sup>.
+ (C)  300dm<sup>3</sup>.
- (D)  600dm<sup>3</sup>.

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In most HV & LV plant rooms, carbon dioxide fire extinguishers are installed in clearly visible and accessible locations. which of the following statements best describes how CO<sub>2</sub> extinguishers work?
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- (A)  CO<sub>2</sub> is non-flammable thus it extinguishers fire.
+ (B)  CO<sub>2</sub> extinguishers fire by depleting Oxygen around fire.
- (C)  CO<sub>2</sub> reduces atmospheric pressure to stop fire.
- (D)  CO<sub>2</sub> fire extinguishers are not suitable for Electrical fires.

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