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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. Stainless fails due to...






2. Compounds classified as salts may have the following characteristics






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






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






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






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






7. A parallelogram with adjacent sides of unequal lengths






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






9. A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it A = piab or A = pi(1/2D)(1/2d) - same as = (pi/4)D/d






10. 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






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






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






13. 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






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






15. Factor of safety






16. 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






17. Sine Rule






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






19. 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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20. Work per power stroke (J)






21. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor






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






23. Micro organisms promote corrosion...






24. Mechanical efficiency






25. 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






26. 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






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






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






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






30. A straight line that joins 2 points or circumference






31. PVn(super script n) = C






32. Cosine rule






33. The act or process of measuring






34. 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% -






35. A triangle with no two sides of equal length






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






37. 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...






38. Force






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






40. Force - work done - power - mechanical efficiency






41. 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






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






43. A closed plane figure bounded by straight sides






44. 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.






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






46. Pythagoras' Theorem






47. Velocity ratio is...






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






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






50. As the cosine decreases - the...







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