Test your basic knowledge |

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






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






3. 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?






4. Force - work done - power - mechanical efficiency






5. Micro organisms promote corrosion...






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






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






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






9. As the cosine decreases - the...






10. Work per second






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






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






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






14. u = initial velocity (m/s) - v = final velocity (m/s) - t = time (s) - s = distance (m) - a = acceleration (m/s/s) - g = acceleration due to gravity (m/s/s)






15. Pythagoras' Theorem






16. 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






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






18. Stainless fails due to...






19. Any two angles whose sum is 90






20. A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it A = piab or A = pi(1/2D)(1/2d) - same as = (pi/4)D/d






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






22. 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






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






24. 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.






25. Reflex angle






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






27. Right angle






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






29. 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






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






31. 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...






32. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...






33. Of a process or change taking place at constant temperature - PV = C






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






35. P & IDs






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






37. One is the trigonometric value of...






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






39. 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






40. 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






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






42. Factor of safety






43. Mechanical efficiency






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






45. Area of a segment






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






47. A parallelogram with four equal sides






48. A closed plane figure bounded by straight sides






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






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