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






2. 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






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






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






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






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






7. The amount of heat required to completely melt 25 kg of ice from a temperature of -10






8. The classes of fastening devices are...






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






10. Obtuse angle






11. PFDs






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






13. Velocity ratio is...






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






15. 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?






16. A parallelogram with adjacent sides of unequal lengths






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






18. Stainless fails due to...






19. Force - work done - power - mechanical efficiency






20. Mechanical efficiency






21. The act or process of measuring






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






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






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






25. 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)






26. Protons have a mass number of...






27. Energy can be...






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






29. coefficient of superficial (area) expansion






30. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal






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






32. Straight angle






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






34. A quadrilateral with no parallel sides






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






36. Any two angles whose sum is 90






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






38. Work per power stroke (J)






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






40. As the cosine decreases - the...






41. The law that states that for a fixed amount of gas at a constant pressure - the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases






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






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






44. 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






45. Resistance to wear - abrasion and penetration






46. Kinetic energy (Ek)






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






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






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






50. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...






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