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






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






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






4. 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






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






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






7. Obtuse angle






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






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






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






11. Pythagoras' Theorem






12. The classes of fastening devices are...






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






14. 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






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






16. The ratio of the density of a substance to the density of a standard substance at the same temperature and pressure - the ratio of the density of the substance to the density of the substance to the density of water






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






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






19. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies






20. P & IDs






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






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






23. 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






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






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






26. H2SO4 is the chemical formula for...






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






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






29. Energy can be...






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






31. 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






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






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






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






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






36. Micro organisms promote corrosion...






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






38. Force - work done - power - mechanical efficiency






39. A parallelogram with four equal sides






40. 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






41. coefficient of expansion






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






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






44. Right angle






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






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






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






48. A triangle with no two sides of equal length






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

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50. 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