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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. Sine Rule






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






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






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






5. coefficient of expansion






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






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






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






9. Reflex angle






10. A straight line that joins 2 points or circumference






11. 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






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






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






14. Force






15. 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






16. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only






17. Area of a segment






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






19. A quadrilateral with two parallel sides






20. 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






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






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






23. 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






24. Cosine rule






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






26. Obtuse angle






27. coefficient of volumetric expansion

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






29. A parallelogram with adjacent sides of unequal lengths






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






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






32. Force - work done - power - mechanical efficiency






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






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






35. 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






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






37. A pinch of salt is added to a glass of water. The result is...






38. Mechanical efficiency






39. 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






40. As the cosine decreases - the...






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






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






43. The classes of fastening devices are...






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






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






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






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






48. A displacement of 9 m north of point A - and another of 6 m west of point A can be added to give a resultant displacement from point A of...






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






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







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