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






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






3. Micro organisms promote corrosion...






4. A quadrilateral with no parallel sides






5. Any two angles whose sum is 90






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






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






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






9. Orthographic projection means...






10. Cosine rule






11. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2






12. 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)






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






14. A quadrilateral with two parallel sides






15. A parallelogram with adjacent sides of unequal lengths






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






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






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






19. H2SO4 is the chemical formula for...






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






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






22. Sine Rule






23. Force - work done - power - mechanical efficiency






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






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






26. 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






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






28. Safe working stress is determined by...






29. Resistance to wear - abrasion and penetration






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






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


32. The most common thread used in North America on fasteners such as bolts - is the...






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






34. PVn(super script n) = C






35. 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?






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






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






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






39. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...






40. coefficient of volumetric expansion


41. 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






42. One is the trigonometric value of...






43. 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






44. As the cosine decreases - the...






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






46. The act or process of measuring






47. 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...






48. A triangle with no two sides of equal length






49. Kinetic energy (Ek)






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