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Test your basic knowledge |
Power Engineering
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Study First
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. Steam turbine bearings are usually made of...
White metal and bronze
Cathodic protection system
latent heat of evaporation (vaporation)
A number with the necessary unit
2. 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
Value of the angle increases
Calorimetry
Process flow drawing
Charles Law
3. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Mass
45 kN
Calorimetry
Resultant
4. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Pm x A x L x N
8908 kJ
Chord
Resultant
5. PFDs
A = 4/3h2 [(square root)d/h-0.608]
Exactly 180 degrees
A solution
Process flow drawing
6. coefficient of volumetric expansion
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7. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Purpose of P & IDs
Total heat required for change of state
Problem solving order
More than 90 degrees
8. A parallelogram with adjacent sides of unequal lengths
Naperian (Natural) logarithms
Specific heat
The equilibrant
Rhomboid
9. Copper fails due to...
0.0723
Ammonia
One
Calorimetry
10. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Less than 90 degrees
Specific heat
110.6 kPa
M x g x h (kg x 9.81 m/s/s x height (m))
11. Change in tempereature where no heat in transferred - PV(supercript v) = C
Power
Adiabatic
Trapezium
179.02
12. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Falling temperature
0.89
Tangent
Celsius
13. 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
Toughness
Charles Law
Octagon
That is supported at two ends
14. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Pm x A x L
Isothermal
Problem solving order
dryness fraction
15. Ratio of the opposite to the adjacent side of a right- angled triangle
Tangent
Trapezoid
Opposite side / hypotenuse
Heat engines
16. 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
Output power(W)/input power(W)
Unified National
displacement
Stress corrosion cracking
17. 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
Boyle's law
Transformed to different forms
0.0002
Relative density
18. Orthographic projection means...
View of a cutting plane
Trapezium
Specific heat
Material balance
19. The precise measurement of heat flow out of a system for chemical and physical processes
latent heat of evaporation (vaporation)
Calorimetry
Problem solving order
Stress corrosion cracking
20. The temperature of saturated steam vapor at 980 kPa is...
Conditions required to produce sulphide corrosion cracking
Transformed to different forms
Total heat required for change of state
179.02
21. Obtuse angle
Pm x A x L
161
A twisting or turning effect
More than 90 degrees
22. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Specific heat
Be the same at any point in the process
Stroke
Trapezium
23. Malleable cast iron is produced by...
Ultimate stress/working stress
Heating and cooling white cast iron at a controlled rate
As a ratio
70 MPa
24. Micro organisms promote corrosion...
Less than 90 degrees
A. sine of 90
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
8908 kJ
25. When classifying beams - the term simple beam refers to a beam
One
That is supported at two ends
displacement
Resultant
26. One is the trigonometric value of...
Chlorides
0.0002
Continuity flow
A. sine of 90
27. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Sensible heat
Coefficient of friction
Permanent and removable
That is supported at two ends
28. Force
A Greek letter alpha linear
Trapezoid
Mass x acceleration (N)
Work
29. The classes of fastening devices are...
Sensible heat
benefits of chromium - nickel and copper in alloy steels
Divide the maximum load by the original cross - sectional area
Permanent and removable
30. H2SO4 is the chemical formula for...
Problem solving order
Power
benefits of nickel
Sulfuric acid
31. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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32. The term _____ is used as a measure of the quantity of matter.
Relative density
Mass
latent heat of evaporation (vaporation)
A
33. PVn(super script n) = C
Stroke
Heat engines
polytropic
0.0002
34. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Pm x A x L x N
Increase
ellipse
Heating and cooling white cast iron at a controlled rate
35. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Complementary angles
Stroke
Opposite side / hypotenuse
A twisting or turning effect
36. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
benefits of copper
Charles Law
10.8 m N of W
Adiabatic
37. PV=nRT - Boyle's law and Charle's law combined
Ideal mechanical advantage
General gas law
Divide the maximum load by the original cross - sectional area
Less than 90 degrees
38. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Purpose of P & IDs
4.4 m/s
Greater than 180 degrees
Power
39. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Ideal mechanical advantage
Continuity flow
Toughness
520.72 kJ/kg
40. Pythagoras' Theorem
View of a cutting plane
A
Purpose of material balance
brinell hardness test
41. The force that is equal in magnitude but opposite in direction to the resultant force is called
Ammonia
520.72 kJ/kg
The equilibrant
Work
42. 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
Continuity flow
Unified National
Heat engines
Toughness
43. The most common material used in making large industrial diesel engine pistons is...
179.02
A solution
Isosceles triangle
Cast iron
44. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
Resultant
distance
polygon
Greater than 180 degrees
45. 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
displacement
Opposite side / hypotenuse
Process flow drawing
hardness
46. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
polytropic
A = 4/3h2 [(square root)d/h-0.608]
effective pressure
A
47. A triangle with two equal sides
Specific heat
Naperian (Natural) logarithms
Isosceles triangle
Calorimetry
48. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
A
Specific heat
Celsius
Stroke
49. A parallelogram with four equal sides
Falling temperature
Divide the maximum load by the original cross - sectional area
Exactly 180 degrees
Rhombus
50. coefficient of superficial (area) expansion
Complementary angles
Increase
Gamma - coefficient of superficial = 2x coefficient of linear expansion
179.02
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