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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. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
520.72 kJ/kg
Unified National
Stroke
161
2. Area of a segment
Octagon
A = 4/3h2 [(square root)d/h-0.608]
A / SinA = b / SinB = c / SinC
Ammonia
3. coefficient of volumetric expansion
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4. Pythagoras' Theorem
57.48 mm
benefits of chromium
520.72 kJ/kg
A
5. Obtuse angle
Celsius
Chord
More than 90 degrees
Complementary angles
6. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
70 MPa
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Tangent
benefits of nickel
7. Is the required to change a unit mass from a gas to liquid or liquid to a gas
179.02
latent heat of evaporation (vaporation)
Process flow drawing
Heat engines
8. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Be the same at any point in the process
Total heat required for change of state
Scalene triangle
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
9. A 10 m long steel pipe when heated to increase its temperature by 85
179.02
1 cm
Pm x A x L x N
distance
10. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Specific heat
0.0723
Purpose of material balance
Opposite side / hypotenuse
11. Straight angle
Exactly 180 degrees
polygon
Ideal mechanical advantage
A solution
12. Sine Rule
Composite material
hardness
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
A / SinA = b / SinB = c / SinC
13. 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...
Pm x A x L x N
Latent heat of evaporation
A solution
Process flow drawing
14. A quadrilateral with two parallel sides
Specific heat
4.4 m/s
Trapezoid
The elastic limit of the material is not exceeded
15. 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...
0.89
10.8 m N of W
Naperian (Natural) logarithms
Specific heat
16. Potential energy (Ep)
latent heat of evaporation (vaporation)
Calorimetry
Malleability
M x g x h (kg x 9.81 m/s/s x height (m))
17. Any two angles whose sum is 90
Total heat required for change of state
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Purpose of material balance
Complementary angles
18. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Falling temperature
A number with the necessary unit
Naperian (Natural) logarithms
benefits of nickel
19. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
benefits of copper
Pm x A x L x N
Isosceles triangle
One angle is exactly 90 degrees
20. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
Stray current corrosion
Ideal mechanical advantage
effective pressure
Trapezium
21. 1. In a right angle triangle - the sine of an acute angle is equal to...
10.8 m N of W
Composite material
View of a cutting plane
Opposite side / hypotenuse
22. Mechanical efficiency
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Output power(W)/input power(W)
Chlorides
2.3026
23. Ratio of the opposite to the adjacent side of a right- angled triangle
View of a cutting plane
Be the same at any point in the process
Rhomboid
Tangent
24. Right angle
One angle is exactly 90 degrees
White
Process flow drawing
Exactly 180 degrees
25. P & IDs
57.48 mm
elasticity
Mechanical flow diagrams
dryness fraction
26. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Isothermal
Details of P & IDs
Rhombus
110.6 kPa
27. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
hexagon
distance
Sensible heat
benefits of copper
28. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
effective pressure
Specific heat
The elastic limit of the material is not exceeded
Purpose of material balance
29. A triangle with two equal sides
The equilibrant
Isosceles triangle
Hooke's Law
10.8 m N of W
30. Safe working stress is determined by...
Dividing the ultimate strength by the factor of safety
Trapezium
Charles Law
Rhomboid
31. 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
Divide the maximum load by the original cross - sectional area
Power
Ultimate stress/working stress
displacement
32. Reflex angle
elasticity
Greater than 180 degrees
Unified National
The elastic limit of the material is not exceeded
33. 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)
Hooke's Law
Tangent
As a ratio
linear motion relationships
34. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Areas of sectors (bounded by 2 radii and arc between them)
Relative density
Latent heat of evaporation
Calorimetry
35. The force that is equal in magnitude but opposite in direction to the resultant force is called
The equilibrant
Output power(W)/input power(W)
4.4 m/s
Less than 90 degrees
36. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Purpose of material balance
Be the same at any point in the process
That is supported at two ends
Cathodic protection system
37. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
brinell hardness test
White
A number with the necessary unit
General gas law
38. The most common scale in use is the...
Specific heat
Complementary angles
The elastic limit of the material is not exceeded
Celsius
39. Force - work done - power - mechanical efficiency
To calculate power from an engine
Permanent and removable
Problem solving order
elasticity
40. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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41. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
110.6 kPa
The elastic limit of the material is not exceeded
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
General gas law
42. 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
Stress corrosion cracking
benefits of nickel
Mass
Boyle's law
43. The precise measurement of heat flow out of a system for chemical and physical processes
The specific heat of the material
Calorimetry
1 cm
Ammonia
44. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Boyle's law
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Sensible heat
Material balance
45. A closed plane figure bounded by straight sides
polygon
The elastic limit of the material is not exceeded
More than 90 degrees
Less than 90 degrees
46. coefficient of expansion
A Greek letter alpha linear
To calculate power from an engine
Ultimate stress/working stress
General gas law
47. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
A
Increase
dryness fraction
Less than 90 degrees
48. Copper fails due to...
Be the same at any point in the process
The elastic limit of the material is not exceeded
Pm x A x L
Ammonia
49. The most common material used in making large industrial diesel engine pistons is...
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
One angle is exactly 90 degrees
polytropic
Cast iron
50. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Work
distance
Stray current corrosion
Specific heat
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