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






2. Any two angles whose sum is 90






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






4. 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...






5. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp






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






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






8. 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






9. The most common thread used in North America on fasteners such as bolts - is the...






10. Reflex angle






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






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






13. Force - work done - power - mechanical efficiency






14. 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.






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






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






17. Energy can be...






18. Right angle






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






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






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






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






23. Straight angle






24. P & IDs






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






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






27. The classes of fastening devices are...






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






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






30. Mechanical efficiency






31. 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)






32. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.


33. Force






34. Sine Rule






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






36. Compounds classified as salts may have the following characteristics






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






38. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation






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






40. Work per second






41. Ability to withstand deformation above elastic limit under compression without failure






42. 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






43. 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






44. The heat required to raise the temperature of water at a pressure of 225 kPa from 0






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






46. Copper fails due to...






47. 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






48. H2SO4 is the chemical formula for...






49. Protons have a mass number of...






50. The act or process of measuring