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. Copper fails due to...






2. Ratio of the opposite to the adjacent side of a right- angled triangle






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






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






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






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






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. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm






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






10. Kinetic energy (Ek)






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






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






13. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel






14. Potential energy (Ep)






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






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






17. A triangle with two equal sides






18. 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






19. 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






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






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

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22. Factor of safety






23. 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






24. 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






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






26. As the cosine decreases - the...






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






28. The classes of fastening devices are...






29. 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






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






31. Force






32. The act or process of measuring






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






34. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...






35. 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...






36. Being made of 2 or more substances creating unique characteristics and properties when combine






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






38. A straight line that joins 2 points or circumference






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






40. 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






41. Orthographic projection means...






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






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






44. One is the trigonometric value of...






45. 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?






46. Right angle






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






48. Is the required to change a unit mass from a gas to liquid or liquid to a gas






49. Acute angle






50. A quadrilateral with no parallel sides