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. 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






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






3. The classes of fastening devices are...






4. Safe working stress is determined by...






5. Energy can be...






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






7. Straight angle






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






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






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






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






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






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






14. Orthographic projection means...






15. Copper fails due to...






16. Pythagoras' Theorem






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






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






19. 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?






20. The act or process of measuring






21. Cosine rule






22. A parallelogram with adjacent sides of unequal lengths






23. Resistance to wear - abrasion and penetration






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






25. As the cosine decreases - the...






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






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






28. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details






29. 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...






30. 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.






31. Velocity ratio is...






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






33. 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






34. 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






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






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






37. Area of a segment






38. 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






39. The heat required to raise the temperature of water at a pressure of 225 kPa from 0






40. 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






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






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






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






44. A closed plane figure bounded by straight sides






45. A quadrilateral with no parallel sides






46. The ability to return to its original shape after an external force has been removed






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






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. Kinetic energy (Ek)






50. 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)