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. Any two angles whose sum is 90






2. Safe working stress is determined by...






3. A parallelogram with adjacent sides of unequal lengths






4. Acute angle






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






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






7. Straight angle






8. 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






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






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. PVn(super script n) = C






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






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






14. Force






15. Right angle






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






17. A quadrilateral with two parallel sides






18. 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






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






20. A quadrilateral with no parallel sides






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






22. Kinetic energy (Ek)






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






24. Cosine rule






25. 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






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






27. Malleable cast iron is produced by...






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






29. H2SO4 is the chemical formula for...






30. Potential energy (Ep)






31. Mechanical efficiency






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






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






34. A scalar quantity is one which has only magnitude and can be fully described by...






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






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






37. Velocity ratio is...






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






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






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






41. Work per second






42. Energy can be...






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






44. Micro organisms promote corrosion...






45. 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.






46. 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...






47. 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)






48. A closed plane figure bounded by straight sides






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






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