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 moment of a force about a point is...






2. 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






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






4. A triangle with two equal sides






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






6. 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...






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






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






9. Velocity ratio is...






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






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






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






13. Pre- construction - shows graphically the mechanical design engineer's work - during construction - proper location - reference to all equipment - after construction - training reference anddetails of process - utility and electrical systems






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






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






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






17. A closed plane figure bounded by straight sides






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






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






20. Kinetic energy (Ek)






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






22. Pythagoras' Theorem






23. Sine Rule






24. 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






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






26. 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






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






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






29. Factor of safety






30. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal






31. coefficient of superficial (area) expansion






32. 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?






33. 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






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






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






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






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






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






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






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






41. Moist hydrogen sulphide environment - hydrogen sulphide must be present - water - even trace amount - high strength steel - steel must be under tensile stress - either applied or residual






42. Force






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






44. 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






45. Cosine rule






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






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






48. A parallelogram with four equal sides






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






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