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. 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% -






2. Reflex angle






3. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)






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






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






6. Cosine rule






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






8. Force - work done - power - mechanical efficiency






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






10. Safe working stress is determined by...






11. Change in tempereature where no heat in transferred - PV(supercript v) = C






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






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






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






15. 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






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






17. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear






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






19. 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






20. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.






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






22. Work per power stroke (J)






23. Malleable cast iron is produced by...






24. Velocity ratio is...






25. A closed plane figure bounded by straight sides






26. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain

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27. Stainless fails due to...






28. Copper fails due to...






29. Straight angle






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






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






32. A straight line that joins 2 points or circumference






33. Factor of safety






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






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

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36. A displacement of 9 m north of point A - and another of 6 m west of point A can be added to give a resultant displacement from point A of...






37. 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






38. 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.






39. PFDs






40. The most common thread used in North America on fasteners such as bolts - is the...






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






42. Compounds classified as salts may have the following characteristics






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






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






45. Protons have a mass number of...






46. 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






47. 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?






48. One is the trigonometric value of...






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






50. Acute angle