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






2. Obtuse angle






3. 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






4. 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






5. Orthographic projection means...






6. As the cosine decreases - the...






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






8. Right angle






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






10. Any two angles whose sum is 90






11. Force






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






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






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






15. Micro organisms promote corrosion...






16. Velocity ratio is...






17. Compounds classified as salts may have the following characteristics






18. 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






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






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






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






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






23. coefficient of expansion






24. coefficient of superficial (area) expansion






25. P & IDs






26. H2SO4 is the chemical formula for...






27. Protons have a mass number of...






28. One is the trigonometric value of...






29. Work per power stroke (J)






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






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






33. Safe working stress is determined by...






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






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

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






37. coefficient of volumetric expansion

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






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






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






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






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






43. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...






44. PVn(super script n) = C






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






46. 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






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






48. A pinch of salt is added to a glass of water. The result is...






49. 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






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