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. P & IDs






2. Force - work done - power - mechanical efficiency






3. Force






4. Orthographic projection means...






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






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






7. A pinch of salt is added to a glass of water. The result is...






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






9. 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.






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






11. 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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12. Acute angle






13. A parallelogram with adjacent sides of unequal lengths






14. PVn(super script n) = C






15. H2SO4 is the chemical formula for...






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






17. Velocity ratio is...






18. Ratio of the opposite to the adjacent side of a right- angled triangle






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






20. Reflex angle






21. A quadrilateral with no parallel sides






22. 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






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






24. Copper fails due to...






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






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






27. 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...






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






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






30. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will






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






32. A parallelogram with four equal sides






33. Malleable cast iron is produced by...






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






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






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






37. Steam turbine bearings are usually made of...






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






39. Sine Rule






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






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






42. 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






43. A triangle with two equal sides






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






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






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






47. 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)






48. A straight line that joins 2 points or circumference






49. coefficient of volumetric expansion

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50. Factor of safety