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






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






3. A parallelogram with adjacent sides of unequal lengths






4. The ability to return to its original shape after an external force has been removed






5. A straight line that joins 2 points or circumference






6. 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






7. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...






8. Micro organisms promote corrosion...






9. coefficient of superficial (area) expansion






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






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






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






13. u = initial velocity (m/s) - v = final velocity (m/s) - t = time (s) - s = distance (m) - a = acceleration (m/s/s) - g = acceleration due to gravity (m/s/s)






14. Pythagoras' Theorem






15. Malleable cast iron is produced by...






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






17. Potential energy (Ep)






18. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will






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






20. Area of a segment






21. The temperature of saturated steam vapor at 980 kPa is...






22. coefficient of expansion






23. The law that states that for a fixed amount of gas at a constant pressure - the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases






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






25. 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% -






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






27. Reflex angle






28. Work per second






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






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






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






32. P & IDs






33. As the cosine decreases - the...






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






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






36. Factor of safety






37. Compounds classified as salts may have the following characteristics






38. Straight angle






39. 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






40. 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






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






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






43. 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?






44. Force






45. H2SO4 is the chemical formula for...






46. 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...






47. 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






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






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






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