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. PVn(super script n) = C






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






3. Kinetic energy (Ek)






4. A 10 m long steel pipe when heated to increase its temperature by 85






5. Area of a segment






6. 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






7. Stainless fails due to...






8. In a pipe if no fluid is added or removed - flow must remain constant - due to the product of area and velocity being constant - flow must be the same going in as coming out of pipe






9. 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






10. 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






11. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...






12. coefficient of expansion






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






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






15. A parallelogram with four equal sides






16. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain

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






18. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...






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






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






21. Any two angles whose sum is 90






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






23. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -






24. Refers to change in the position of the body - relative to some reference point - not concerned with actual distance traveled - a vector quantity with magnitude and direction






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






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






27. 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






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






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






30. 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






31. Orthographic projection means...






32. Sine Rule






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






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






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






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






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






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






39. One is the trigonometric value of...






40. A parallelogram with adjacent sides of unequal lengths






41. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp






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






43. Work per power stroke (J)






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






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






46. Velocity ratio is...






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






48. coefficient of superficial (area) expansion






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






50. Malleable cast iron is produced by...