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






2. Copper fails due to...






3. 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






4. Obtuse angle






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






6. Energy can be...






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






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






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






10. coefficient of expansion






11. 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






12. The classes of fastening devices are...






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






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






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






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






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






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






19. Factor of safety






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






21. The act or process of measuring






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






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






24. As the cosine decreases - 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. The most common scale in use is the...






27. 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






28. Reflex angle






29. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor






30. H2SO4 is the chemical formula for...






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






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






33. Right angle






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






35. coefficient of superficial (area) expansion






36. 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...






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






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






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






40. 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?






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






42. P & IDs






43. 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






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






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. Sine Rule






47. Compounds classified as salts may have the following characteristics






48. 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






49. 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.






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