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. PVn(super script n) = C






2. PFDs






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






4. 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






5. 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)






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






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






8. The classes of fastening devices are...






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






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






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






12. 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






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






14. 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?






15. Acute angle






16. Compounds classified as salts may have the following characteristics






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






18. Of a process or change taking place at constant temperature - PV = C






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






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






21. 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






22. Copper fails due to...






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

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24. A straight line that joins 2 points or circumference






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






26. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...






27. A quadrilateral with two parallel sides






28. The law that states that for a fixed amount of gas at a constant pressure - the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases






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






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






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






32. The ratio of the density of a substance to the density of a standard substance at the same temperature and pressure - the ratio of the density of the substance to the density of the substance to the density of water






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






34. Malleable cast iron is produced by...






35. Work per second






36. 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






37. Work per power stroke (J)






38. 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.






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






40. 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






41. As the cosine decreases - the...






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






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






44. 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






45. Energy can be...






46. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...






47. Protons have a mass number of...






48. A parallelogram with adjacent sides of unequal lengths






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






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