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Test your basic knowledge |
Power Engineering
Start Test
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. Micro organisms promote corrosion...
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
26.81 m/s
Ideal mechanical advantage
effective pressure
2. Pythagoras' Theorem
Purpose of material balance
A
Exactly 180 degrees
One angle is exactly 90 degrees
3. A pinch of salt is added to a glass of water. The result is...
Continuity flow
dryness fraction
A solution
The elastic limit of the material is not exceeded
4. Mechanical efficiency
Output power(W)/input power(W)
10.8 m N of W
Complementary angles
Isothermal
5. A parallelogram with adjacent sides of unequal lengths
Stroke
4.4 m/s
Rhomboid
Purpose of material balance
6. coefficient of volumetric expansion
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7. 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...
effective pressure
Latent heat of evaporation
Unified National
Ideal mechanical advantage
8. Safe working stress is determined by...
45 kN
Sensible heat
Continuity flow
Dividing the ultimate strength by the factor of safety
9. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
Falling temperature
Details of P & IDs
Mensuration
10. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
benefits of chromium - nickel and copper in alloy steels
Specific heat
45 kN
elasticity
11. P & IDs
Problem solving order
Isosceles triangle
Heating and cooling white cast iron at a controlled rate
Mechanical flow diagrams
12. Steam turbine bearings are usually made of...
Mass x acceleration (N)
White metal and bronze
The specific heat of the material
latent heat of evaporation (vaporation)
13. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
110.6 kPa
Stress corrosion cracking
0.0002
A. sine of 90
14. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
benefits of copper
Rhomboid
Resultant
0.89
15. coefficient of superficial (area) expansion
Gamma - coefficient of superficial = 2x coefficient of linear expansion
White metal and bronze
Chord
A / SinA = b / SinB = c / SinC
16. Protons have a mass number of...
A solution
One
Work
Rhombus
17. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
Scalene triangle
hardness
The elastic limit of the material is not exceeded
polytropic
18. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
effective pressure
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Naperian (Natural) logarithms
Mass
19. The term _____ is used as a measure of the quantity of matter.
Details of P & IDs
Mass
ellipse
Chlorides
20. Copper fails due to...
Ammonia
Cast iron
Permanent and removable
Total heat required for change of state
21. The factor of safety is always expressed...
View of a cutting plane
As a ratio
Isothermal
Adiabatic
22. 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
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Relative density
Transformed to different forms
23. Force
Trapezoid
Mass x acceleration (N)
Process flow drawing
0.89
24. 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)
displacement
Details of P & IDs
linear motion relationships
velocity
25. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
Naperian (Natural) logarithms
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
179.02
basic oxygen process
26. coefficient of expansion
A Greek letter alpha linear
110.6 kPa
Latent heat of evaporation
Specific heat
27. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
hardness
A
White
Power
28. A triangle with no two sides of equal length
Scalene triangle
Material balance
benefits of chromium
Hooke's Law
29. The precise measurement of heat flow out of a system for chemical and physical processes
Sulfuric acid
Calorimetry
The elastic limit of the material is not exceeded
1 cm
30. 1. In a right angle triangle - the sine of an acute angle is equal to...
Latent heat of evaporation
Opposite side / hypotenuse
water equivalent
110.6 kPa
31. PV=nRT - Boyle's law and Charle's law combined
Calorimetry
Heat engines
520.72 kJ/kg
General gas law
32. Straight angle
179.02
26.81 m/s
Exactly 180 degrees
70 MPa
33. The ability to return to its original shape after an external force has been removed
elasticity
Output power(W)/input power(W)
70 MPa
Greater than 180 degrees
34. A quadrilateral with no parallel sides
Coefficient of friction
4.4 m/s
benefits of nickel
Trapezium
35. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Permanent and removable
Resultant
520.72 kJ/kg
Stray current corrosion
36. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Complementary angles
Naperian (Natural) logarithms
latent heat of evaporation (vaporation)
The elastic limit of the material is not exceeded
37. When calculating the ultimate stress of a material - we should
Divide the maximum load by the original cross - sectional area
The elastic limit of the material is not exceeded
161
polygon
38. Being made of 2 or more substances creating unique characteristics and properties when combine
Mensuration
Composite material
Ammonia
Power
39. The act or process of measuring
View of a cutting plane
Latent heat of evaporation
Total heat required for change of state
Mensuration
40. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
57.48 mm
As a ratio
Resultant
2.3026
41. 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?
Falling temperature
0.0723
Stroke
45 kN
42. A scalar quantity is one which has only magnitude and can be fully described by...
Latent heat of evaporation
179.02
0.0723
A number with the necessary unit
43. Work per second
Conditions required to produce sulphide corrosion cracking
benefits of chromium - nickel and copper in alloy steels
Pm x A x L x N
Total heat required for change of state
44. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Purpose of material balance
Falling temperature
Sensible heat
Rhomboid
45. The classes of fastening devices are...
Permanent and removable
Continuity flow
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Isothermal
46. Whether a material will break under sudden impact or hard blow
Mensuration
Material balance
ellipse
Toughness
47. Resistance to wear - abrasion and penetration
hardness
Value of the angle increases
1/2mv2 (kg x velocity(m/s))
More than 90 degrees
48. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
hexagon
To calculate power from an engine
520.72 kJ/kg
Mensuration
49. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
Rhombus
A solution
distance
linear motion relationships
50. Reflex angle
Greater than 180 degrees
White
Details of P & IDs
A = 4/3h2 [(square root)d/h-0.608]