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. PVn(super script n) = C






2. 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






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






4. A straight line that joins 2 points or circumference






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






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






8. coefficient of volumetric expansion

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9. Energy can be...






10. The temperature of saturated steam vapor at 980 kPa is...






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






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






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






14. 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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15. 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...






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






17. A parallelogram with four equal sides






18. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...






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






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






21. H2SO4 is the chemical formula for...






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






23. Cosine rule






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






25. 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






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






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






28. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10






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






30. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -






31. 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






32. 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






33. Testing metals and nonmetals of low to medium hardness. uses a ball that is pressed into material and basis calculations on the diameters of ball and indentation.






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






35. A triangle with no two sides of equal length






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






37. The force that is equal in magnitude but opposite in direction to the resultant force is called






38. coefficient of expansion






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






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






41. P & IDs






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






43. 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






44. Right angle






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






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






47. The classes of fastening devices are...






48. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel






49. One is the trigonometric value of...






50. Force