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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. Any two angles whose sum is 90
ellipse
8908 kJ
elasticity
Complementary angles
2. Safe working stress is determined by...
Dividing the ultimate strength by the factor of safety
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Power
Unified National
3. A parallelogram with adjacent sides of unequal lengths
benefits of chromium - nickel and copper in alloy steels
Rhomboid
161
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
4. Acute angle
Areas of sectors (bounded by 2 radii and arc between them)
General gas law
Less than 90 degrees
Ultimate stress/working stress
5. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
Stress corrosion cracking
Naperian (Natural) logarithms
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
A twisting or turning effect
6. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
benefits of chromium - nickel and copper in alloy steels
Conditions required to produce sulphide corrosion cracking
Value of the angle increases
Areas of sectors (bounded by 2 radii and arc between them)
7. Straight angle
Less than 90 degrees
4.4 m/s
Coefficient of friction
Exactly 180 degrees
8. 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
Heating and cooling white cast iron at a controlled rate
Greater than 180 degrees
As a ratio
Purpose of P & IDs
9. In the equation 0.004 + D = 0.0042 - the value of D is...
0.0002
Divide the maximum load by the original cross - sectional area
Tangent
brinell hardness test
10. 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
Isothermal
Increase
effective pressure
Conditions required to produce sulphide corrosion cracking
11. PVn(super script n) = C
polytropic
Ultimate stress/working stress
White
Hooke's Law
12. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
hexagon
effective pressure
Mensuration
velocity
13. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
elasticity
Continuity flow
110.6 kPa
Mass
14. Force
Opposite side / hypotenuse
Isosceles triangle
Adiabatic
Mass x acceleration (N)
15. Right angle
Cast iron
benefits of copper
One angle is exactly 90 degrees
Chord
16. A gas occupies 8.62 m3 at 1800 kPa and 26
The specific heat of the material
161
Details of P & IDs
8908 kJ
17. A quadrilateral with two parallel sides
Trapezoid
Material balance
Cathodic protection system
Toughness
18. 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
benefits of copper
Latent heat of evaporation
Octagon
Resultant
19. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
Work
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Heating and cooling white cast iron at a controlled rate
20. A quadrilateral with no parallel sides
Be the same at any point in the process
More than 90 degrees
Trapezium
Problem solving order
21. Being made of 2 or more substances creating unique characteristics and properties when combine
520.72 kJ/kg
0.89
Composite material
45 kN
22. Kinetic energy (Ek)
A = 4/3h2 [(square root)d/h-0.608]
Isothermal
0.89
1/2mv2 (kg x velocity(m/s))
23. When calculating the ultimate stress of a material - we should
That is supported at two ends
Trapezoid
Divide the maximum load by the original cross - sectional area
Trapezium
24. Cosine rule
A
Charles Law
benefits of chromium
Stroke
25. 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
Exactly 180 degrees
45 kN
distance
Stress corrosion cracking
26. The rate at which heat flow through a slab of a material does not depend on...
Heat engines
dryness fraction
The specific heat of the material
A Greek letter alpha linear
27. Malleable cast iron is produced by...
displacement
Cathodic protection system
Specific heat
Heating and cooling white cast iron at a controlled rate
28. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
distance
Mechanical flow diagrams
That is supported at two ends
1 cm
29. H2SO4 is the chemical formula for...
Falling temperature
Tangent
Sulfuric acid
polygon
30. Potential energy (Ep)
basic oxygen process
A = 4/3h2 [(square root)d/h-0.608]
Tangent
M x g x h (kg x 9.81 m/s/s x height (m))
31. Mechanical efficiency
effective pressure
Falling temperature
Output power(W)/input power(W)
General gas law
32. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
0.89
The equilibrant
45 kN
One
33. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
hexagon
A Greek letter alpha linear
More than 90 degrees
Stroke
34. A scalar quantity is one which has only magnitude and can be fully described by...
Stray current corrosion
benefits of copper
Less than 90 degrees
A number with the necessary unit
35. The factor of safety is always expressed...
The specific heat of the material
As a ratio
Permanent and removable
Stray current corrosion
36. The force that is equal in magnitude but opposite in direction to the resultant force is called
One
hardness
Ultimate stress/working stress
The equilibrant
37. Velocity ratio is...
Material balance
Less than 90 degrees
M x g x h (kg x 9.81 m/s/s x height (m))
Ideal mechanical advantage
38. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
A
Purpose of material balance
water equivalent
distance
39. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Specific heat
Specific heat
Boyle's law
latent heat of evaporation (vaporation)
40. Negative terminal of the rectifier must always be connected to the structure that is being protected
26.81 m/s
latent heat of evaporation (vaporation)
Composite material
Cathodic protection system
41. Work per second
Sulfuric acid
Pm x A x L x N
0.89
Trapezium
42. Energy can be...
110.6 kPa
Greater than 180 degrees
Transformed to different forms
Less than 90 degrees
43. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
Greater than 180 degrees
57.48 mm
Malleability
basic oxygen process
44. Micro organisms promote corrosion...
View of a cutting plane
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Rhombus
One
45. 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.
Work
brinell hardness test
Relative density
linear motion relationships
46. 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...
0.0723
10.8 m N of W
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
520.72 kJ/kg
47. 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)
Total heat required for change of state
linear motion relationships
dryness fraction
ellipse
48. A closed plane figure bounded by straight sides
brinell hardness test
Ammonia
displacement
polygon
49. Expansion of a gas is said to be adiabatic when expansion takes place at...
Falling temperature
velocity
benefits of chromium
Complementary angles
50. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
basic oxygen process
A = 4/3h2 [(square root)d/h-0.608]
Gamma - coefficient of superficial = 2x coefficient of linear expansion