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. Work per power stroke (J)






2. 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






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






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






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






6. Malleable cast iron is produced by...






7. The amount of heat required to completely melt 25 kg of ice from a temperature of -10






8. 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






9. coefficient of volumetric expansion

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






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






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






13. PVn(super script n) = C






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






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






16. Mechanical efficiency






17. 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






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






19. P & IDs






20. Reflex angle






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






22. One is the trigonometric value of...






23. Orthographic projection means...






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






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






26. Copper fails due to...






27. Protons have a mass number of...






28. A quadrilateral with no parallel sides






29. 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...






30. A closed plane figure bounded by straight sides






31. Factor of safety






32. 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.






33. Stainless fails due to...






34. A straight line that joins 2 points or circumference






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






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






37. 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






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






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






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






41. Potential energy (Ep)






42. Safe working stress is determined by...






43. When calculating the ultimate stress of a material - we should






44. 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






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






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






47. Energy can be...






48. Kinetic energy (Ek)






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






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