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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. A quadrilateral with two parallel sides
Latent heat of evaporation
Coefficient of friction
Trapezoid
As a ratio
2. coefficient of expansion
White
A Greek letter alpha linear
Trapezium
benefits of chromium
3. Work per second
Pm x A x L x N
White
Heat engines
Coefficient of friction
4. 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
Malleability
brinell hardness test
Charles Law
ellipse
5. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
161
0.0002
Naperian (Natural) logarithms
Adiabatic
6. Cosine rule
Stroke
A
Details of P & IDs
Cast iron
7. 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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8. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
520.72 kJ/kg
Stroke
A solution
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
9. A pinch of salt is added to a glass of water. The result is...
Divide the maximum load by the original cross - sectional area
A solution
Boyle's law
Malleability
10. The precise measurement of heat flow out of a system for chemical and physical processes
0.89
Calorimetry
A Greek letter alpha linear
Output power(W)/input power(W)
11. Copper fails due to...
Ammonia
A Greek letter alpha linear
Output power(W)/input power(W)
White
12. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
8908 kJ
Rhomboid
Transformed to different forms
A Greek letter alpha linear
13. 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?
Mechanical flow diagrams
Conditions required to produce sulphide corrosion cracking
That is supported at two ends
45 kN
14. Means that the sum of the matter leaving the plant equals the sum of the matter entering
hexagon
45 kN
Pm x A x L
Material balance
15. When calculating the ultimate stress of a material - we should
distance
Octagon
Divide the maximum load by the original cross - sectional area
Isosceles triangle
16. The ability to return to its original shape after an external force has been removed
elasticity
ellipse
Transformed to different forms
Cast iron
17. Velocity ratio is...
Latent heat of evaporation
Problem solving order
Greater than 180 degrees
Ideal mechanical advantage
18. Reflex angle
Increase
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Greater than 180 degrees
Dividing the ultimate strength by the factor of safety
19. A closed plane figure bounded by straight sides
A = 4/3h2 [(square root)d/h-0.608]
Total heat required for change of state
Chlorides
polygon
20. 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
Boyle's law
Mass x acceleration (N)
As a ratio
displacement
21. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Specific heat
Total heat required for change of state
Problem solving order
2.3026
22. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
4.4 m/s
Complementary angles
distance
1 cm
23. 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
Unified National
polygon
Purpose of P & IDs
Mensuration
24. The moment of a force about a point is...
A twisting or turning effect
polytropic
One angle is exactly 90 degrees
benefits of copper
25. The rate at which heat flow through a slab of a material does not depend on...
The specific heat of the material
One
0.89
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
26. 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)
linear motion relationships
Unified National
Mass x acceleration (N)
Permanent and removable
27. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
4.4 m/s
Chlorides
benefits of copper
White
28. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
70 MPa
Opposite side / hypotenuse
White metal and bronze
Malleability
29. As the cosine decreases - the...
Details of P & IDs
Conditions required to produce sulphide corrosion cracking
Value of the angle increases
hexagon
30. Force - work done - power - mechanical efficiency
dryness fraction
Problem solving order
Ammonia
Mass
31. The temperature of saturated steam vapor at 980 kPa is...
Chlorides
2.3026
Hooke's Law
179.02
32. Ratio of the opposite to the adjacent side of a right- angled triangle
Transformed to different forms
Tangent
benefits of chromium - nickel and copper in alloy steels
0.0723
33. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
basic oxygen process
Opposite side / hypotenuse
General gas law
A / SinA = b / SinB = c / SinC
34. A 10 m long steel pipe when heated to increase its temperature by 85
basic oxygen process
Value of the angle increases
elasticity
1 cm
35. Any two angles whose sum is 90
Celsius
Complementary angles
8908 kJ
Naperian (Natural) logarithms
36. The force that is equal in magnitude but opposite in direction to the resultant force is called
The equilibrant
Value of the angle increases
Cathodic protection system
Cast iron
37. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Rhombus
Isosceles triangle
dryness fraction
Toughness
38. Compounds classified as salts may have the following characteristics
Details of P & IDs
Falling temperature
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Stray current corrosion
39. A parallelogram with adjacent sides of unequal lengths
Rhomboid
linear motion relationships
View of a cutting plane
Octagon
40. 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
0.0723
Coefficient of friction
1 cm
Continuity flow
41. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
velocity
179.02
Divide the maximum load by the original cross - sectional area
1/2mv2 (kg x velocity(m/s))
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
Composite material
Cast iron
brinell hardness test
Stress corrosion cracking
43. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Ultimate stress/working stress
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
polytropic
Be the same at any point in the process
44. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
As a ratio
Resultant
hardness
45 kN
45. Protons have a mass number of...
One
Tangent
General gas law
Celsius
46. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Purpose of material balance
hardness
Composite material
Stroke
47. Stainless fails due to...
White
As a ratio
Continuity flow
Chlorides
48. 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
Unified National
Problem solving order
10.8 m N of W
Octagon
49. The most common material used in making large industrial diesel engine pistons is...
benefits of nickel
Conditions required to produce sulphide corrosion cracking
More than 90 degrees
Cast iron
50. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
179.02
A number with the necessary unit
The elastic limit of the material is not exceeded
Heat engines