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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. Malleable cast iron is produced by...
A. sine of 90
Trapezoid
Conditions required to produce sulphide corrosion cracking
Heating and cooling white cast iron at a controlled rate
2. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
dryness fraction
Specific heat
Output power(W)/input power(W)
3. A triangle with no two sides of equal length
179.02
benefits of chromium - nickel and copper in alloy steels
Resultant
Scalene triangle
4. Any two angles whose sum is 90
Ammonia
Trapezoid
Complementary angles
benefits of chromium
5. 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
Charles Law
Permanent and removable
A. sine of 90
Purpose of P & IDs
6. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Permanent and removable
The equilibrant
velocity
7. Factor of safety
Material balance
70 MPa
A Greek letter alpha linear
Ultimate stress/working stress
8. Force - work done - power - mechanical efficiency
Problem solving order
Coefficient of friction
Mass
Mensuration
9. A quadrilateral with two parallel sides
Isothermal
Celsius
Greater than 180 degrees
Trapezoid
10. A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it A = piab or A = pi(1/2D)(1/2d) - same as = (pi/4)D/d
Tangent
Output power(W)/input power(W)
Dividing the ultimate strength by the factor of safety
ellipse
11. A scalar quantity is one which has only magnitude and can be fully described by...
A number with the necessary unit
Specific heat
A twisting or turning effect
A. sine of 90
12. The ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface u = tan(thada) - coefficient of friction is equal to the tangent of friction angle
Sulfuric acid
Coefficient of friction
Rhombus
Dividing the ultimate strength by the factor of safety
13. Sine Rule
A Greek letter alpha linear
latent heat of evaporation (vaporation)
distance
A / SinA = b / SinB = c / SinC
14. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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15. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Process flow drawing
Trapezoid
Sensible heat
More than 90 degrees
16. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Mass
White
Continuity flow
8908 kJ
17. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Power
Tangent
Permanent and removable
hardness
18. Straight angle
Exactly 180 degrees
Naperian (Natural) logarithms
Coefficient of friction
161
19. Resistance to corrosion and oxidation at high temperatures - improves toughness - prevents brittleness at low temperatures - increases strength without affecting toughness - amounts range from 1-4% - high impact resistance at amounts as high as 36% -
benefits of nickel
hexagon
General gas law
Celsius
20. Cosine rule
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
70 MPa
Heating and cooling white cast iron at a controlled rate
A
21. coefficient of volumetric expansion
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22. Ability to withstand deformation above elastic limit under compression without failure
Malleability
8908 kJ
Mass x acceleration (N)
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
23. The classes of fastening devices are...
polytropic
A solution
Permanent and removable
Mensuration
24. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
10.8 m N of W
Permanent and removable
distance
Rhombus
25. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
A Greek letter alpha linear
26.81 m/s
Naperian (Natural) logarithms
Purpose of material balance
26. Force
brinell hardness test
Continuity flow
Cast iron
Mass x acceleration (N)
27. A closed plane figure bounded by straight sides
Sensible heat
A / SinA = b / SinB = c / SinC
polygon
A
28. The force that is equal in magnitude but opposite in direction to the resultant force is called
Pm x A x L
The equilibrant
26.81 m/s
Work
29. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain
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30. Of a process or change taking place at constant temperature - PV = C
Isothermal
The specific heat of the material
Permanent and removable
Tangent
31. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
A = 4/3h2 [(square root)d/h-0.608]
Less than 90 degrees
Mass x acceleration (N)
520.72 kJ/kg
32. A triangle with two equal sides
Naperian (Natural) logarithms
hardness
Isosceles triangle
Permanent and removable
33. The precise measurement of heat flow out of a system for chemical and physical processes
Mass x acceleration (N)
Ammonia
The equilibrant
Calorimetry
34. As the cosine decreases - the...
Unified National
Mass
Value of the angle increases
Trapezium
35. Velocity ratio is...
polygon
Ideal mechanical advantage
Problem solving order
Output power(W)/input power(W)
36. The most common scale in use is the...
As a ratio
Complementary angles
Celsius
Resultant
37. 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
Isothermal
Ultimate stress/working stress
4.4 m/s
Octagon
38. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
distance
45 kN
A twisting or turning effect
The elastic limit of the material is not exceeded
39. When classifying beams - the term simple beam refers to a beam
Cast iron
Calorimetry
That is supported at two ends
A twisting or turning effect
40. Work per power stroke (J)
Pm x A x L
Details of P & IDs
Value of the angle increases
hardness
41. H2SO4 is the chemical formula for...
Latent heat of evaporation
Mensuration
A / SinA = b / SinB = c / SinC
Sulfuric acid
42. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
45 kN
benefits of chromium - nickel and copper in alloy steels
Isosceles triangle
Dividing the ultimate strength by the factor of safety
43. A parallelogram with adjacent sides of unequal lengths
Rhomboid
Composite material
Adiabatic
Stroke
44. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Composite material
Heat engines
Stroke
elasticity
45. Right angle
110.6 kPa
Falling temperature
One angle is exactly 90 degrees
Exactly 180 degrees
46. One is the trigonometric value of...
Areas of sectors (bounded by 2 radii and arc between them)
To calculate power from an engine
basic oxygen process
A. sine of 90
47. The term _____ is used as a measure of the quantity of matter.
linear motion relationships
View of a cutting plane
Mass
1/2mv2 (kg x velocity(m/s))
48. 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
Charles Law
Opposite side / hypotenuse
Adiabatic
26.81 m/s
49. Being made of 2 or more substances creating unique characteristics and properties when combine
Material balance
0.0723
Relative density
Composite material
50. Change in tempereature where no heat in transferred - PV(supercript v) = C
Adiabatic
Naperian (Natural) logarithms
benefits of copper
Heating and cooling white cast iron at a controlled rate
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