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






2. Reflex angle






3. When calculating the ultimate stress of a material - we should






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






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






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






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






8. Work per power stroke (J)






9. A quadrilateral with two parallel sides






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






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






12. 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






13. Straight angle






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






15. 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.






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






17. 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






18. P & IDs






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






20. A straight line that joins 2 points or circumference






21. 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






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






23. Kinetic energy (Ek)






24. A triangle with two equal sides






25. As the cosine decreases - the...






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






27. A parallelogram with adjacent sides of unequal lengths






28. Factor of safety






29. Energy can be...






30. 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...






31. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second






32. 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






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






35. coefficient of expansion






36. coefficient of superficial (area) expansion






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






38. Force






39. The classes of fastening devices are...






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






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






42. 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...






43. Compounds classified as salts may have the following characteristics






44. Resistance to wear - abrasion and penetration






45. A triangle with no two sides of equal length






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






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






48. u = initial velocity (m/s) - v = final velocity (m/s) - t = time (s) - s = distance (m) - a = acceleration (m/s/s) - g = acceleration due to gravity (m/s/s)






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






50. Acute angle