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






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






3. Pythagoras' Theorem






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






5. Copper fails due to...






6. A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it A = piab or A = pi(1/2D)(1/2d) - same as = (pi/4)D/d






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






8. Acute angle






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






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






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






12. Force - work done - power - mechanical efficiency






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






14. Malleable cast iron is produced by...






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






16. coefficient of expansion






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






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






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






20. A straight line that joins 2 points or circumference






21. A closed plane figure bounded by straight sides






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






23. Sine Rule






24. 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






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






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






27. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...






28. Micro organisms promote corrosion...






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






30. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion






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






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






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






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






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






36. Energy can be...






37. PFDs






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






39. The factor of safety is always expressed...






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






41. The act or process of measuring






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






43. 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.






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






45. Protons have a mass number of...






46. 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% -






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






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






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






50. Work per power stroke (J)