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






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






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






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






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






6. The classes of fastening devices are...






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






8. 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






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






10. Work per power stroke (J)






11. 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...






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






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






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






15. Cosine rule






16. A closed plane figure bounded by straight sides






17. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change






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






19. A quadrilateral with no parallel sides






20. Micro organisms promote corrosion...






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






22. Mechanical efficiency






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






24. P & IDs






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






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






27. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands






28. Malleable cast iron is produced by...






29. A quadrilateral with two parallel sides






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






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






32. Kinetic energy (Ek)






33. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...






34. Safe working stress is determined by...






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






36. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known






37. Work per second






38. coefficient of volumetric expansion

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39. Sine Rule






40. As the cosine decreases - the...






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






42. Obtuse angle






43. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor






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






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






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






47. 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...






48. 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






49. Right angle






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







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