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






2. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second






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






4. 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






5. Kinetic energy (Ek)






6. Energy can be...






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






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






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






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






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






12. Stainless fails due to...






13. Resistance to wear - abrasion and penetration






14. Of a process or change taking place at constant temperature - PV = C






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






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






17. Sine Rule






18. Right angle






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

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






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






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






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






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






25. Mechanical efficiency






26. As the cosine decreases - the...






27. A triangle with two equal sides






28. 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?






29. 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)






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






31. Factor of safety






32. Potential energy (Ep)






33. Pre- construction - shows graphically the mechanical design engineer's work - during construction - proper location - reference to all equipment - after construction - training reference anddetails of process - utility and electrical systems






34. 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.






35. Reflex angle






36. 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






37. Velocity ratio is...






38. 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






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






40. One is the trigonometric value of...






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






42. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion






43. Force






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






45. Safe working stress is determined by...






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






47. Ability to withstand deformation above elastic limit under compression without failure






48. Compounds classified as salts may have the following characteristics






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






50. 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







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