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. 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






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






3. Resistance to wear - abrasion and penetration






4. 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






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






6. A quadrilateral with no parallel sides






7. P & IDs






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






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






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. Factor of safety






13. The rate at which heat flow through a slab of a material does not depend on...






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






15. Kinetic energy (Ek)






16. A triangle with no two sides of equal length






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






18. Acute angle






19. 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)






20. coefficient of volumetric expansion

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21. Velocity ratio is...






22. Micro organisms promote corrosion...






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






24. A body having a gravitational force of 2000 N - is pulled along a horizontal surface at constant speed by a rope that makes an angle of 20






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






26. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm






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






28. Straight angle






29. Work per power stroke (J)






30. H2SO4 is the chemical formula for...






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






32. 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






33. The moment of a force about a point is...






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






35. Expansion of a gas is said to be adiabatic when expansion takes place at...






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






37. Copper fails due to...






38. A closed plane figure bounded by straight sides






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






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






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






43. The amount of heat required to completely melt 25 kg of ice from a temperature of -10






44. A quadrilateral with two parallel sides






45. Area of a segment






46. As the cosine decreases - the...






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






48. PVn(super script n) = C






49. Any two angles whose sum is 90






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