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






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






3. 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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4. coefficient of volumetric expansion

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5. 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






6. Acute angle






7. 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






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






9. Velocity ratio is...






10. The law that states that for a fixed amount of gas at a constant pressure - the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases






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






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






13. 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






14. The precise measurement of heat flow out of a system for chemical and physical processes






15. P & IDs






16. 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.






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






18. Safe working stress is determined by...






19. Mechanical efficiency






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






21. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear






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






23. The classes of fastening devices are...






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






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






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






27. Stainless fails due to...






28. A parallelogram with four equal sides






29. Resistance to wear - abrasion and penetration






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






31. Protons have a mass number of...






32. 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






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






34. Micro organisms promote corrosion...






35. When classifying beams - the term simple beam refers to a beam






36. Potential energy (Ep)






37. 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?






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






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






40. Sine Rule






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






42. 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






43. 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...






44. 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






45. A triangle with no two sides of equal length






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






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






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






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






50. Area of a segment