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






2. coefficient of superficial (area) expansion






3. Straight angle






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






5. A quadrilateral with no parallel sides






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






7. A parallelogram with four equal sides






8. 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






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






10. 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






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






12. Mechanical efficiency






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






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






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






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






17. Obtuse angle






18. A gas occupies 8.62 m3 at 1800 kPa and 26






19. A parallelogram with adjacent sides of unequal lengths






20. Stainless fails due to...






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






22. 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?






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






24. P & IDs






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






26. 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






27. When classifying beams - the term simple beam refers to a beam






28. Acute angle






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






30. 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






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






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






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






34. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...






35. Resistance to wear - abrasion and penetration






36. A straight line that joins 2 points or circumference






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






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






39. Orthographic projection means...






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






41. Work per power stroke (J)






42. Any two angles whose sum is 90






43. Area of a segment






44. The act or process of measuring






45. The most common scale in use is the...






46. 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






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






48. 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...






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






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