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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. Kinetic energy (Ek)






2. As the cosine decreases - the...






3. Compounds classified as salts may have the following characteristics






4. Pythagoras' Theorem






5. Cosine rule






6. 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






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






8. Acute angle






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






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






11. 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






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. Sine Rule






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






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






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






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






18. Resistance to wear - abrasion and penetration






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






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






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






22. A quadrilateral with no parallel sides






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






24. 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






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






26. A closed plane figure bounded by straight sides






27. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will






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






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






30. A triangle with no two sides of equal length






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






32. Right angle






33. A straight line that joins 2 points or circumference






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






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






36. Work per second






37. 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






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






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






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






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






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






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

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






46. Straight angle






47. The heat required to raise the temperature of water at a pressure of 225 kPa from 0






48. Mechanical efficiency






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






50. The classes of fastening devices are...