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. Steam turbine bearings are usually made of...






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






3. A triangle with two equal sides






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






5. coefficient of volumetric expansion

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






7. 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






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






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

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10. 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






11. 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






12. As the cosine decreases - the...






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






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






15. A parallelogram with four equal sides






16. Dangerous because a crack starts slowly and propagate slowly - exceed breaking strength and the metal fails suddenly - stress must be tensile can be produced by an external load or residual stress - condensed moisture and change in temperature






17. H2SO4 is the chemical formula for...






18. 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






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






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






21. Right angle






22. coefficient of superficial (area) expansion






23. 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






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






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






26. PFDs






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






28. Being made of 2 or more substances creating unique characteristics and properties when combine






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






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






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






32. A parallelogram with adjacent sides of unequal lengths






33. Sine Rule






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






35. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...






36. Work per second






37. Straight angle






38. 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...






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






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






41. Velocity ratio is...






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






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






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






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






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






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






48. Compounds classified as salts may have the following characteristics






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






50. Malleable cast iron is produced by...