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






2. 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?






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






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






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






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






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






8. PFDs






9. Force






10. 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...






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






12. 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






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






14. One is the trigonometric value of...






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






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






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






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






19. coefficient of volumetric expansion


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






21. Obtuse angle






22. Any two angles whose sum is 90






23. 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.






24. Resistance to wear - abrasion and penetration






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






26. Sine Rule






27. Force - work done - power - mechanical efficiency






28. PVn(super script n) = C






29. As the cosine decreases - the...






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






31. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second






32. A quadrilateral with no parallel sides






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






34. Acute angle






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






36. Protons have a mass number of...






37. Pythagoras' Theorem






38. Pre- construction - shows graphically the mechanical design engineer's work - during construction - proper location - reference to all equipment - after construction - training reference anddetails of process - utility and electrical systems






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






40. Work per power stroke (J)






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






42. 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






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






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






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






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






47. Cosine rule






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






49. coefficient of superficial (area) expansion






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