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






2. PV=nRT - Boyle's law and Charle's law combined






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






4. 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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5. 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






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






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






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






9. A quadrilateral with no parallel sides






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






11. Straight angle






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






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






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






15. Work per power stroke (J)






16. coefficient of superficial (area) expansion






17. H2SO4 is the chemical formula for...






18. A parallelogram with adjacent sides of unequal lengths






19. A straight line that joins 2 points or circumference






20. A parallelogram with four equal sides






21. The act or process of measuring






22. 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






23. 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% -






24. A triangle with no two sides of equal length






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






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






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






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






29. Force - work done - power - mechanical efficiency






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






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






32. Safe working stress is determined by...






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






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






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






36. 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.






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






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






39. A quadrilateral with two parallel sides






40. A displacement of 9 m north of point A - and another of 6 m west of point A can be added to give a resultant displacement from point A of...






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






42. Reflex angle






43. The term _____ is used as a measure of the quantity of matter.






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






45. Work per second






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






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






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






49. Obtuse angle






50. Factor of safety