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. Moist hydrogen sulphide environment - hydrogen sulphide must be present - water - even trace amount - high strength steel - steel must be under tensile stress - either applied or residual






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






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






4. 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






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






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






7. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.






8. Velocity ratio is...






9. Straight angle






10. A closed plane figure bounded by straight sides






11. Whether a material will break under sudden impact or hard blow






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






13. PVn(super script n) = C






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






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






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






17. 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...






18. Area of a segment






19. Mechanical efficiency






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






21. A straight line that joins 2 points or circumference






22. Reflex angle






23. Factor of safety






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






25. H2SO4 is the chemical formula for...






26. Protons have a mass number of...






27. As the cosine decreases - the...






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






29. 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.






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






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






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






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






34. 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






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






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






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






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






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






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






41. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain

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

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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. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear






45. 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






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






47. Copper fails due to...






48. Work per power stroke (J)






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






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