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. Obtuse angle






2. Mechanical efficiency






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






4. Sine Rule






5. A body having a gravitational force of 2000 N - is pulled along a horizontal surface at constant speed by a rope that makes an angle of 20






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






7. Kinetic energy (Ek)






8. Force - work done - power - mechanical efficiency






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






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






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






12. A quadrilateral with two parallel sides






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






14. 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






15. PVn(super script n) = C






16. Stainless fails due to...






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






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






19. 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...






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

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21. Right angle






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






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






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






25. Any two angles whose sum is 90






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






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






28. Ability to withstand deformation above elastic limit under compression without failure






29. A triangle with two equal sides






30. Velocity ratio is...






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






32. 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






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






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






35. Potential energy (Ep)






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






37. Pythagoras' Theorem






38. A triangle with no two sides of equal length






39. Micro organisms promote corrosion...






40. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.






41. The act or process of measuring






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






43. The rate at which heat flow through a slab of a material does not depend on...






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






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






46. A 6 m long cantilever beam carries a concentrated load of 45 kN at its free end. What is the shear force at the wall?






47. 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






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






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






50. Straight angle