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. 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






2. 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






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






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






5. A parallelogram with adjacent sides of unequal lengths






6. Straight angle






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






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






9. coefficient of expansion






10. 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...






11. A parallelogram with four equal sides






12. Energy can be...






13. The act or process of measuring






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






15. coefficient of superficial (area) expansion






16. Sine Rule






17. Pythagoras' Theorem






18. 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)






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






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






21. Any two angles whose sum is 90






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






23. 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...






24. Compounds classified as salts may have the following characteristics






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






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






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






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






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






30. 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






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






32. PVn(super script n) = C






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






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






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






36. Kinetic energy (Ek)






37. A quadrilateral with two parallel sides






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






39. 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.






40. Safe working stress is determined by...






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






42. 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% -






43. 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






44. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...






45. coefficient of volumetric expansion


46. 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






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






48. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain


49. One is the trigonometric value of...






50. 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?