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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. Obtuse angle






2. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation






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






4. Velocity ratio is...






5. The classes of fastening devices are...






6. 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






7. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10






8. As the cosine decreases - the...






9. The precise measurement of heat flow out of a system for chemical and physical processes






10. Energy can be...






11. P & IDs






12. A straight line that joins 2 points or circumference






13. Moist hydrogen sulphide environment - hydrogen sulphide must be present - water - even trace amount - high strength steel - steel must be under tensile stress - either applied or residual






14. coefficient of volumetric expansion

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15. One is the trigonometric value of...






16. The moment of a force about a point is...






17. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2






18. Ratio of the opposite to the adjacent side of a right- angled triangle






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






20. A pinch of salt is added to a glass of water. The result is...






21. Refers to change in the position of the body - relative to some reference point - not concerned with actual distance traveled - a vector quantity with magnitude and direction






22. Right angle






23. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor






24. All sides equal - all angles are equal and opposite sides parallel - divided into 6 ISOSCELES triangles - each angle in an octagon is 135 - A = 4.83s2






25. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel






26. In the equation 0.004 + D = 0.0042 - the value of D is...






27. coefficient of superficial (area) expansion






28. Force - work done - power - mechanical efficiency






29. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke






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






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






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






33. When heat is supplied to a liquid in sufficient quantity to change the liquid to a vapour without changing the temperature - the heat supplied is known as...






34. Steam turbine bearings are usually made of...






35. H2SO4 is the chemical formula for...






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

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37. Sine Rule






38. 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






39. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%






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






41. Force






42. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second






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






44. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)






45. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree






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






47. A triangle with two equal sides






48. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only






49. Straight angle






50. A 6 m long cantilever beam carries a concentrated load of 45 kN at its free end. What is the shear force at the wall?







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