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. 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






2. Work per second






3. Force - work done - power - mechanical efficiency






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






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






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






7. 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






8. 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)






9. 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






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






11. A triangle with two equal sides






12. PVn(super script n) = C






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






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






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






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






17. Acute angle






18. A parallelogram with four equal sides






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






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






21. Factor of safety






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






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






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






25. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...






26. As the cosine decreases - the...






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






28. Velocity ratio is...






29. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.






30. One is the trigonometric value of...






31. Kinetic energy (Ek)






32. Copper fails due to...






33. Stainless fails due to...






34. A quadrilateral with two parallel sides






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






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






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






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






39. A scalar quantity is one which has only magnitude and can be fully described by...






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






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






42. Straight angle






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






44. 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






45. Obtuse angle






46. 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?






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






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






49. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies






50. Negative terminal of the rectifier must always be connected to the structure that is being protected