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Power Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor






2. Energy can be...






3. Safe working stress is determined by...






4. The ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface u = tan(thada) - coefficient of friction is equal to the tangent of friction angle






5. coefficient of superficial (area) expansion






6. Dangerous because a crack starts slowly and propagate slowly - exceed breaking strength and the metal fails suddenly - stress must be tensile can be produced by an external load or residual stress - condensed moisture and change in temperature






7. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change






8. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will






9. The amount of heat required to completely melt 25 kg of ice from a temperature of -10






10. Force - work done - power - mechanical efficiency






11. Negative terminal of the rectifier must always be connected to the structure that is being protected






12. Work per second






13. Means that the sum of the matter leaving the plant equals the sum of the matter entering






14. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal






15. Copper fails due to...






16. The temperature of saturated steam vapor at 980 kPa is...






17. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details






18. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...






19. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies






20. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...






21. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.

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22. Micro organisms promote corrosion...






23. Change in tempereature where no heat in transferred - PV(supercript v) = C






24. The act or process of measuring






25. Pre- construction - shows graphically the mechanical design engineer's work - during construction - proper location - reference to all equipment - after construction - training reference anddetails of process - utility and electrical systems






26. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known






27. Resists oxidation - high strength at high temperatures - increases hardness and abrasion resistance without increasing brittleness - increases response to heat treatment - increases depth of hardness penetration - at 12% chromium steel with not tarni






28. The most common material used in making large industrial diesel engine pistons is...






29. A displacement of 9 m north of point A - and another of 6 m west of point A can be added to give a resultant displacement from point A of...






30. Protons have a mass number of...






31. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...






32. As the cosine decreases - the...






33. Right angle






34. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...






35. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will






36. The ratio of the density of a substance to the density of a standard substance at the same temperature and pressure - the ratio of the density of the substance to the density of the substance to the density of water






37. A triangle with two equal sides






38. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm






39. Testing metals and nonmetals of low to medium hardness. uses a ball that is pressed into material and basis calculations on the diameters of ball and indentation.






40. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second






41. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear






42. Malleable cast iron is produced by...






43. Obtuse angle






44. The term _____ is used as a measure of the quantity of matter.






45. 1. In a right angle triangle - the sine of an acute angle is equal to...






46. A quadrilateral with two parallel sides






47. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion






48. Kinetic energy (Ek)






49. Is the required to change a unit mass from a gas to liquid or liquid to a gas






50. Velocity ratio is...







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