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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. Acute angle






2. The classes of fastening devices are...






3. Potential energy (Ep)






4. coefficient of expansion






5. A scalar quantity is one which has only magnitude and can be fully described by...






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






7. 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






8. coefficient of superficial (area) expansion






9. A closed plane figure bounded by straight sides






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






11. One is the trigonometric value of...






12. Force - work done - power - mechanical efficiency






13. A parallelogram with four equal sides






14. P & IDs






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






16. A quadrilateral with two parallel sides






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






18. Obtuse angle






19. 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% -






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






21. coefficient of volumetric expansion

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






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






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






25. Velocity ratio is...






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






27. Work per second






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






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






30. 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.






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






32. A triangle with no two sides of equal length






33. 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...






34. A quadrilateral with no parallel sides






35. Pythagoras' Theorem






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






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






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






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






40. Dangerous because a crack starts slowly and propagate slowly - exceed breaking strength and the metal fails suddenly - stress must be tensile can be produced by an external load or residual stress - condensed moisture and change in temperature






41. 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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42. Right angle






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






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






45. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change






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






47. 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






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






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






50. Compounds classified as salts may have the following characteristics







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