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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. 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






2. A quadrilateral with no parallel sides






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






4. Obtuse angle






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






6. 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.






7. 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






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






9. 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






10. 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






11. Protons have a mass number of...






12. Potential energy (Ep)






13. The factor of safety is always expressed...






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






15. Malleable cast iron is produced by...






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






17. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -






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






19. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp






20. Force - work done - power - mechanical efficiency






21. Force






22. 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






23. Ability to withstand deformation above elastic limit under compression without failure






24. The act or process of measuring






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






26. A closed plane figure bounded by straight sides






27. Stainless fails due to...






28. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands






29. Right angle






30. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...






31. 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...






32. The rate at which heat flow through a slab of a material does not depend on...






33. Safe working stress is determined by...






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






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






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






37. 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...






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






39. coefficient of superficial (area) expansion






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






41. A parallelogram with four equal sides






42. Orthographic projection means...






43. 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






44. Any two angles whose sum is 90






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






46. Sine Rule






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






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






49. Expansion of a gas is said to be adiabatic when expansion takes place at...






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







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