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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 total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke






2. Area of a segment






3. coefficient of volumetric expansion

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4. Pythagoras' Theorem






5. Obtuse angle






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






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






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






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






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






11. Straight angle






12. Sine Rule






13. 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...






14. A quadrilateral with two parallel sides






15. 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...






16. Potential energy (Ep)






17. Any two angles whose sum is 90






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






19. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%






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






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






22. Mechanical efficiency






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






24. Right angle






25. P & IDs






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






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






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






29. A triangle with two equal sides






30. Safe working stress is determined by...






31. 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






32. Reflex angle






33. 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)






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






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






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






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






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






39. Force - work done - power - mechanical efficiency






40. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.

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






42. 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






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






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






45. A closed plane figure bounded by straight sides






46. coefficient of expansion






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






48. Copper fails due to...






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






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







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