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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. Steam turbine bearings are usually made of...






2. 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






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






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






5. PFDs






6. coefficient of volumetric expansion

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






8. A parallelogram with adjacent sides of unequal lengths






9. Copper fails due to...






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






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






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






13. 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






14. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal






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






16. 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






17. 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






18. Orthographic projection means...






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






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






21. Obtuse angle






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






23. Malleable cast iron is produced by...






24. Micro organisms promote corrosion...






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






26. One is the trigonometric value of...






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






28. Force






29. The classes of fastening devices are...






30. H2SO4 is the chemical formula for...






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

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






33. PVn(super script n) = C






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






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






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






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






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






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






40. Pythagoras' Theorem






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






42. 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






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






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






45. 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






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






47. A triangle with two equal sides






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






49. A parallelogram with four equal sides






50. coefficient of superficial (area) expansion







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