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. A closed plane figure bounded by straight sides






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






3. PFDs






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






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






6. A quadrilateral with no parallel sides






7. Force






8. 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






9. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...






10. Cosine rule






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






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






13. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change






14. Potential energy (Ep)






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






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






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






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






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






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






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






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






23. coefficient of expansion






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






25. Sine Rule






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






27. Safe working stress is determined by...






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

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29. Obtuse angle






30. Force - work done - power - mechanical efficiency






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






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






33. Malleable cast iron is produced by...






34. Testing metals and nonmetals of low to medium hardness. uses a ball that is pressed into material and basis calculations on the diameters of ball and indentation.






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






36. A parallelogram with adjacent sides of unequal lengths






37. Kinetic energy (Ek)






38. 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% -






39. Copper fails due to...






40. coefficient of volumetric expansion

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






42. Resistance to wear - abrasion and penetration






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






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






45. 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






46. Compounds classified as salts may have the following characteristics






47. A quadrilateral with two parallel sides






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






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






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