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






2. 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?






3. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies






4. 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






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






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






7. 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






8. 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...






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






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






11. Work per second






12. The precise measurement of heat flow out of a system for chemical and physical processes






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






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






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






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






17. Ratio of the opposite to the adjacent side of a right- angled triangle






18. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...






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






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






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






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






23. H2SO4 is the chemical formula for...






24. Factor of safety






25. Orthographic projection means...






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






27. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)






28. coefficient of expansion






29. 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






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






31. Potential energy (Ep)






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






33. 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






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






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






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






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






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






39. Malleable cast iron is produced by...






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






41. A closed plane figure bounded by straight sides






42. 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






43. 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






44. 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...






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






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






47. 1. In a right angle triangle - the sine of an acute angle is equal to...






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






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






50. The most common thread used in North America on fasteners such as bolts - is the...