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






2. As the cosine decreases - the...






3. Obtuse angle






4. Pythagoras' Theorem






5. 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






6. PV=nRT - Boyle's law and Charle's law combined






7. 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






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






9. Change in tempereature where no heat in transferred - PV(supercript v) = C






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






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






12. coefficient of volumetric expansion

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






14. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second






15. Reflex angle






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






17. Sine Rule






18. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius






19. Any two angles whose sum is 90






20. A parallelogram with four equal sides






21. Stainless fails due to...






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






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






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






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






26. coefficient of superficial (area) expansion






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






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






29. Straight angle






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






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






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






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






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






35. 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






36. 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)






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






38. Mechanical efficiency






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






40. coefficient of expansion






41. 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






42. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation






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






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






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






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






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






48. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree






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






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