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. 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






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






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






4. Force - work done - power - mechanical efficiency






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






6. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation






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






8. A triangle with no two sides of equal length






9. 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






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






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






12. Work per power stroke (J)






13. Right angle






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






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






16. Factor of safety






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






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






19. 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






20. 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






21. Obtuse angle






22. coefficient of expansion






23. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details






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






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






26. Mechanical efficiency






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






28. As the cosine decreases - the...






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






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






31. The classes of fastening devices are...






32. A quadrilateral with two parallel sides






33. Stainless fails due to...






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






35. A triangle with two equal sides






36. A closed plane figure bounded by straight sides






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






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






39. Safe working stress is determined by...






40. Compounds classified as salts may have the following characteristics






41. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands






42. 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






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






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






45. Cosine rule






46. 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






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






48. Energy can be...






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






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