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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. Being made of 2 or more substances creating unique characteristics and properties when combine
Octagon
Composite material
benefits of chromium
Value of the angle increases
2. As the cosine decreases - the...
Greater than 180 degrees
polytropic
Value of the angle increases
Gamma - coefficient of superficial = 2x coefficient of linear expansion
3. Obtuse angle
More than 90 degrees
A / SinA = b / SinB = c / SinC
Scalene triangle
4.4 m/s
4. Pythagoras' Theorem
Naperian (Natural) logarithms
26.81 m/s
A
Trapezoid
5. 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
Value of the angle increases
Toughness
Conditions required to produce sulphide corrosion cracking
polygon
6. PV=nRT - Boyle's law and Charle's law combined
1 cm
Dividing the ultimate strength by the factor of safety
Cathodic protection system
General gas law
7. 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
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Octagon
dryness fraction
Specific heat
8. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Malleability
Purpose of material balance
Rhomboid
520.72 kJ/kg
9. Change in tempereature where no heat in transferred - PV(supercript v) = C
Adiabatic
Stroke
hardness
Relative density
10. The dryness fraction of steam at a pressure of 400 kPa and a heat content of 2500 kJ/kg is...
Sensible heat
Complementary angles
ellipse
0.89
11. Is 'the equivalent mass of water that would require the same amount of heat transfer as the substance - to produce the same temp. change
Total heat required for change of state
water equivalent
Latent heat of evaporation
distance
12. coefficient of volumetric expansion
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13. Expansion of a gas is said to be adiabatic when expansion takes place at...
Boyle's law
The elastic limit of the material is not exceeded
8908 kJ
Falling temperature
14. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
benefits of chromium
benefits of nickel
General gas law
To calculate power from an engine
15. Reflex angle
Rhombus
Greater than 180 degrees
Cast iron
45 kN
16. Of a process or change taking place at constant temperature - PV = C
A = 4/3h2 [(square root)d/h-0.608]
Isothermal
A solution
Celsius
17. Sine Rule
General gas law
Composite material
Specific heat
A / SinA = b / SinB = c / SinC
18. Is the amount of heat/energy required to increase or decrease the temperature of any given substance's unit mass 1 degree Celsius
distance
Specific heat
Heat engines
hardness
19. Any two angles whose sum is 90
Ideal mechanical advantage
Conditions required to produce sulphide corrosion cracking
The elastic limit of the material is not exceeded
Complementary angles
20. A parallelogram with four equal sides
Sensible heat
One
Details of P & IDs
Rhombus
21. Stainless fails due to...
Mass x acceleration (N)
Cathodic protection system
Octagon
Chlorides
22. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
110.6 kPa
Specific heat
45 kN
161
23. Force(N) x distance(m) or W=Fd - unit of joules - 1KJ = 1000J = 1000Nm = 1KNm - 1MJ = 1000000J = 1000000NM = 1MNm
Work
0.89
More than 90 degrees
benefits of chromium
24. The moment of a force about a point is...
Increase
Divide the maximum load by the original cross - sectional area
A twisting or turning effect
70 MPa
25. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
10.8 m N of W
Pm x A x L x N
Relative density
70 MPa
26. coefficient of superficial (area) expansion
A twisting or turning effect
dryness fraction
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Details of P & IDs
27. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Stray current corrosion
M x g x h (kg x 9.81 m/s/s x height (m))
White metal and bronze
8908 kJ
28. A gas occupies 8.62 m3 at 1800 kPa and 26
benefits of chromium
161
A solution
M x g x h (kg x 9.81 m/s/s x height (m))
29. Straight angle
Work
Be the same at any point in the process
Boyle's law
Exactly 180 degrees
30. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
Hooke's Law
benefits of chromium - nickel and copper in alloy steels
1/2mv2 (kg x velocity(m/s))
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
31. The factor of safety is always expressed...
Hooke's Law
As a ratio
Cathodic protection system
Calorimetry
32. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Unified National
Mass
latent heat of evaporation (vaporation)
Resultant
33. The term _____ is used as a measure of the quantity of matter.
A
Pm x A x L
Mass
General gas law
34. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Rhombus
Material balance
Complementary angles
10.8 m N of W
35. Resists oxidation - high strength at high temperatures - increases hardness and abrasion resistance without increasing brittleness - increases response to heat treatment - increases depth of hardness penetration - at 12% chromium steel with not tarni
latent heat of evaporation (vaporation)
A
Opposite side / hypotenuse
benefits of chromium
36. 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)
Pm x A x L
110.6 kPa
Isothermal
linear motion relationships
37. When calculating the ultimate stress of a material - we should
Octagon
A
Divide the maximum load by the original cross - sectional area
Complementary angles
38. Mechanical efficiency
Process flow drawing
Trapezium
Output power(W)/input power(W)
velocity
39. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
A Greek letter alpha linear
One angle is exactly 90 degrees
That is supported at two ends
velocity
40. coefficient of expansion
Specific heat
Mass
A Greek letter alpha linear
Less than 90 degrees
41. 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
Calorimetry
Mechanical flow diagrams
Relative density
ellipse
42. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Coefficient of friction
Total heat required for change of state
57.48 mm
linear motion relationships
43. A 1 N weight has a kinetic energy of 1 J when its speed is...
4.4 m/s
Stray current corrosion
1 cm
Gamma - coefficient of superficial = 2x coefficient of linear expansion
44. A scalar quantity is one which has only magnitude and can be fully described by...
A Greek letter alpha linear
179.02
A number with the necessary unit
water equivalent
45. The most common thread used in North America on fasteners such as bolts - is the...
Tangent
179.02
Sulfuric acid
Unified National
46. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Purpose of material balance
0.0002
Areas of sectors (bounded by 2 radii and arc between them)
displacement
47. The force that is equal in magnitude but opposite in direction to the resultant force is called
Sensible heat
The equilibrant
One
Conditions required to produce sulphide corrosion cracking
48. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
45 kN
Total heat required for change of state
Specific heat
benefits of copper
49. Steam turbine bearings are usually made of...
Coefficient of friction
Trapezoid
110.6 kPa
White metal and bronze
50. The precise measurement of heat flow out of a system for chemical and physical processes
dryness fraction
Calorimetry
Ultimate stress/working stress
The equilibrant