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






2. 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






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






4. Expansion of a gas is said to be adiabatic when expansion takes place at...






5. Sine Rule






6. A straight line that joins 2 points or circumference






7. Any two angles whose sum is 90






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






9. Right angle






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






11. Compounds classified as salts may have the following characteristics






12. 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






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






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






15. Stainless fails due to...






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






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






18. P & IDs






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






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






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






22. A parallelogram with four equal sides






23. Potential energy (Ep)






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






25. As the cosine decreases - the...






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






27. H2SO4 is the chemical formula for...






28. Safe working stress is determined by...






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






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






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






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






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






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






35. A quadrilateral with two parallel sides






36. Pythagoras' Theorem






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






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






39. Factor of safety






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






41. u = initial velocity (m/s) - v = final velocity (m/s) - t = time (s) - s = distance (m) - a = acceleration (m/s/s) - g = acceleration due to gravity (m/s/s)






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






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






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






45. A gas occupies 8.62 m3 at 1800 kPa and 26






46. Copper fails due to...






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






48. coefficient of volumetric expansion

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49. PFDs






50. Moist hydrogen sulphide environment - hydrogen sulphide must be present - water - even trace amount - high strength steel - steel must be under tensile stress - either applied or residual