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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. H2SO4 is the chemical formula for...






3. Energy can be...






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






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






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






7. The law that states that for a fixed amount of gas at a constant pressure - the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases






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






9. 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






10. Factor of safety






11. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.






12. When calculating the ultimate stress of a material - we should






13. 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...






14. Copper fails due to...






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






16. Pythagoras' Theorem






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






18. A straight line that joins 2 points or circumference






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






20. 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






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






22. Malleable cast iron is produced by...






23. A quadrilateral with two parallel sides






24. The act or process of measuring






25. Mechanical efficiency






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






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






28. Straight angle






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






30. Whether a material will break under sudden impact or hard blow






31. Being made of 2 or more substances creating unique characteristics and properties when combine






32. Right angle






33. A parallelogram with adjacent sides of unequal lengths






34. A 1 N weight has a kinetic energy of 1 J when its speed is...






35. 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.






36. 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






37. Velocity ratio is...






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






39. A 10 m long steel pipe when heated to increase its temperature by 85






40. A body having a gravitational force of 2000 N - is pulled along a horizontal surface at constant speed by a rope that makes an angle of 20






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






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






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






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






45. Resistance to wear - abrasion and penetration






46. The force that is equal in magnitude but opposite in direction to the resultant force is called






47. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius






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






49. Kinetic energy (Ek)






50. A triangle with two equal sides






Can you answer 50 questions in 15 minutes?



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