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






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






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






4. Work per power stroke (J)






5. A parallelogram with four equal sides






6. Stainless fails due to...






7. Area of a segment






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






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






10. 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% -






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






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






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






14. Factor of safety






15. 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






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






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






18. Resists oxidation - high strength at high temperatures - increases hardness and abrasion resistance without increasing brittleness - increases response to heat treatment - increases depth of hardness penetration - at 12% chromium steel with not tarni






19. coefficient of superficial (area) expansion






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






21. Kinetic energy (Ek)






22. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only






23. Resistance to wear - abrasion and penetration






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






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






26. P & IDs






27. One is the trigonometric value of...






28. 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






29. Reflex angle






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






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






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






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






34. 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)






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






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






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






38. A triangle with no two sides of equal length






39. Any two angles whose sum is 90






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






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

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






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






44. All sides equal - all angles are equal and opposite sides parallel - divided into 6 ISOSCELES triangles - each angle in an octagon is 135 - A = 4.83s2






45. The ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface u = tan(thada) - coefficient of friction is equal to the tangent of friction angle






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






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






48. 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






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






50. Obtuse angle