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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
Isosceles triangle
As a ratio
Sulfuric acid
Complementary angles
2. PVn(super script n) = C
2.3026
Purpose of material balance
polytropic
8908 kJ
3. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
Charles Law
latent heat of evaporation (vaporation)
110.6 kPa
2.3026
4. As the cosine decreases - the...
Mechanical flow diagrams
Value of the angle increases
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Isothermal
5. 1. In a right angle triangle - the sine of an acute angle is equal to...
Opposite side / hypotenuse
Greater than 180 degrees
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Work
6. Orthographic projection means...
View of a cutting plane
Problem solving order
polytropic
Unified National
7. Malleable cast iron is produced by...
Continuity flow
Isosceles triangle
26.81 m/s
Heating and cooling white cast iron at a controlled rate
8. Sine Rule
A / SinA = b / SinB = c / SinC
Opposite side / hypotenuse
A solution
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
9. The amount of stretch or compression of an elastic material is directly proportional to the applied force - stress = E (modulus of elasticity) x Strain
10. Factor of safety
latent heat of evaporation (vaporation)
Rhomboid
Ultimate stress/working stress
0.89
11. Pythagoras' Theorem
Celsius
Stroke
Work
A
12. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
70 MPa
Composite material
161
water equivalent
13. 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)
basic oxygen process
2.3026
Stray current corrosion
linear motion relationships
14. A pinch of salt is added to a glass of water. The result is...
Hooke's Law
A solution
Calorimetry
Be the same at any point in the process
15. PFDs
Boyle's law
Process flow drawing
1/2mv2 (kg x velocity(m/s))
One angle is exactly 90 degrees
16. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Isothermal
Details of P & IDs
Be the same at any point in the process
17. Energy can be...
The elastic limit of the material is not exceeded
elasticity
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Transformed to different forms
18. The term _____ is used as a measure of the quantity of matter.
benefits of nickel
benefits of copper
Mass
benefits of chromium
19. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
Mass
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
To calculate power from an engine
Chord
20. 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
Purpose of P & IDs
Stray current corrosion
Pm x A x L
Celsius
21. Potential energy (Ep)
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Composite material
Less than 90 degrees
M x g x h (kg x 9.81 m/s/s x height (m))
22. A triangle with two equal sides
Celsius
Isosceles triangle
Cast iron
Transformed to different forms
23. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
8908 kJ
Sensible heat
Purpose of P & IDs
dryness fraction
24. In a pipe if no fluid is added or removed - flow must remain constant - due to the product of area and velocity being constant - flow must be the same going in as coming out of pipe
Continuity flow
A number with the necessary unit
179.02
A Greek letter alpha linear
25. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
57.48 mm
Rhombus
distance
benefits of chromium
26. 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.
2.3026
brinell hardness test
Toughness
hardness
27. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
Value of the angle increases
benefits of chromium - nickel and copper in alloy steels
Ammonia
Rhombus
28. Straight angle
Be the same at any point in the process
Exactly 180 degrees
Hooke's Law
Isosceles triangle
29. Ability to withstand deformation above elastic limit under compression without failure
Malleability
Mass
distance
Hooke's Law
30. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Continuity flow
Resultant
Divide the maximum load by the original cross - sectional area
0.0723
31. 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
Coefficient of friction
Malleability
Naperian (Natural) logarithms
Ammonia
32. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Isosceles triangle
A / SinA = b / SinB = c / SinC
Purpose of material balance
Exactly 180 degrees
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
Scalene triangle
Heat engines
Pm x A x L
34. Steam turbine bearings are usually made of...
Details of P & IDs
The equilibrant
ellipse
White metal and bronze
35. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
polytropic
Calorimetry
1/2mv2 (kg x velocity(m/s))
The elastic limit of the material is not exceeded
36. A 10 m long steel pipe when heated to increase its temperature by 85
1 cm
Scalene triangle
A = 4/3h2 [(square root)d/h-0.608]
A number with the necessary unit
37. Protons have a mass number of...
Composite material
effective pressure
1/2mv2 (kg x velocity(m/s))
One
38. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
A solution
M x g x h (kg x 9.81 m/s/s x height (m))
Specific heat
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
39. 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
A
A = 4/3h2 [(square root)d/h-0.608]
Stress corrosion cracking
Malleability
40. Acute angle
Boyle's law
Less than 90 degrees
dryness fraction
Sulfuric acid
41. Negative terminal of the rectifier must always be connected to the structure that is being protected
White
brinell hardness test
Cathodic protection system
Permanent and removable
42. Expansion of a gas is said to be adiabatic when expansion takes place at...
Unified National
Mensuration
Charles Law
Falling temperature
43. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Trapezoid
Work
Cathodic protection system
Chlorides
44. coefficient of volumetric expansion
45. Change in tempereature where no heat in transferred - PV(supercript v) = C
Adiabatic
70 MPa
Coefficient of friction
Celsius
46. A triangle with no two sides of equal length
Scalene triangle
Celsius
Less than 90 degrees
View of a cutting plane
47. A parallelogram with adjacent sides of unequal lengths
Heating and cooling white cast iron at a controlled rate
Rhomboid
Hooke's Law
26.81 m/s
48. H2SO4 is the chemical formula for...
Isothermal
Unified National
Sulfuric acid
57.48 mm
49. The classes of fastening devices are...
Naperian (Natural) logarithms
Permanent and removable
Ideal mechanical advantage
2.3026
50. 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
Output power(W)/input power(W)
Conditions required to produce sulphide corrosion cracking
Exactly 180 degrees