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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. Reflex angle
To calculate power from an engine
Greater than 180 degrees
The elastic limit of the material is not exceeded
Continuity flow
2. Work per power stroke (J)
Stroke
A. sine of 90
Pm x A x L
Be the same at any point in the process
3. Velocity ratio is...
Ideal mechanical advantage
Coefficient of friction
Stress corrosion cracking
Permanent and removable
4. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Sensible heat
Charles Law
White
White metal and bronze
5. When calculating the ultimate stress of a material - we should
Divide the maximum load by the original cross - sectional area
brinell hardness test
Work
Gamma - coefficient of superficial = 2x coefficient of linear expansion
6. 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
One
A twisting or turning effect
displacement
161
7. A straight line that joins 2 points or circumference
Chord
Unified National
Output power(W)/input power(W)
velocity
8. A closed plane figure bounded by straight sides
polygon
45 kN
basic oxygen process
View of a cutting plane
9. 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...
Less than 90 degrees
Toughness
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
10.8 m N of W
10. A parallelogram with adjacent sides of unequal lengths
Ammonia
Rhomboid
Falling temperature
Stroke
11. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Exactly 180 degrees
1/2mv2 (kg x velocity(m/s))
benefits of copper
0.0002
12. Expansion of a gas is said to be adiabatic when expansion takes place at...
polygon
Latent heat of evaporation
Falling temperature
hexagon
13. The rate at which heat flow through a slab of a material does not depend on...
Pm x A x L x N
The specific heat of the material
A. sine of 90
Dividing the ultimate strength by the factor of safety
14. Micro organisms promote corrosion...
Output power(W)/input power(W)
Details of P & IDs
110.6 kPa
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
15. PFDs
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Adiabatic
Process flow drawing
Details of P & IDs
16. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
Heating and cooling white cast iron at a controlled rate
velocity
General gas law
Transformed to different forms
17. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
Exactly 180 degrees
Heat engines
The specific heat of the material
520.72 kJ/kg
18. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
Exactly 180 degrees
520.72 kJ/kg
As a ratio
Cast iron
19. PV=nRT - Boyle's law and Charle's law combined
Areas of sectors (bounded by 2 radii and arc between them)
Greater than 180 degrees
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
General gas law
20. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
110.6 kPa
10.8 m N of W
Boyle's law
The specific heat of the material
21. Compounds classified as salts may have the following characteristics
Purpose of P & IDs
Value of the angle increases
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
22. Safe working stress is determined by...
45 kN
More than 90 degrees
Dividing the ultimate strength by the factor of safety
elasticity
23. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
Output power(W)/input power(W)
Relative density
M x g x h (kg x 9.81 m/s/s x height (m))
24. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Details of P & IDs
Resultant
Increase
Chord
25. The classes of fastening devices are...
A
Permanent and removable
Tangent
Complementary angles
26. Mechanical efficiency
View of a cutting plane
Output power(W)/input power(W)
Trapezoid
polygon
27. The force that is equal in magnitude but opposite in direction to the resultant force is called
Specific heat
As a ratio
Pm x A x L
The equilibrant
28. The term _____ is used as a measure of the quantity of matter.
Mass
4.4 m/s
Process flow drawing
Isothermal
29. Force - work done - power - mechanical efficiency
Mechanical flow diagrams
Problem solving order
Conditions required to produce sulphide corrosion cracking
Latent heat of evaporation
30. coefficient of expansion
M x g x h (kg x 9.81 m/s/s x height (m))
The equilibrant
A Greek letter alpha linear
velocity
31. The act or process of measuring
Be the same at any point in the process
Mensuration
Charles Law
Material balance
32. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
That is supported at two ends
General gas law
White
Value of the angle increases
33. A quadrilateral with two parallel sides
161
Trapezoid
Power
Divide the maximum load by the original cross - sectional area
34. 1. Info for sizing equipment 2.compare plant performance against design: flow rates - efficiencies - recovery efficiencies
Purpose of material balance
Relative density
Isothermal
Trapezium
35. 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 Greek letter alpha linear
179.02
water equivalent
The elastic limit of the material is not exceeded
36. 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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183
37. coefficient of superficial (area) expansion
0.89
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Unified National
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
38. For making steal is done in a pear shaped vessel that refines molten iron from a blast furnace and scrap into steel
Boyle's law
Exactly 180 degrees
Sensible heat
basic oxygen process
39. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
White metal and bronze
polytropic
Areas of sectors (bounded by 2 radii and arc between them)
Transformed to different forms
40. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
benefits of chromium - nickel and copper in alloy steels
Stray current corrosion
Malleability
0.0002
41. 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)
Stress corrosion cracking
linear motion relationships
Output power(W)/input power(W)
elasticity
42. 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
A solution
Malleability
benefits of chromium
Continuity flow
43. Area of a segment
Increase
A number with the necessary unit
A = 4/3h2 [(square root)d/h-0.608]
Specific heat
44. Change in tempereature where no heat in transferred - PV(supercript v) = C
A Greek letter alpha linear
A solution
Relative density
Adiabatic
45. Protons have a mass number of...
One
Adiabatic
Ideal mechanical advantage
Cathodic protection system
46. Resistance to wear - abrasion and penetration
4.4 m/s
More than 90 degrees
hardness
Opposite side / hypotenuse
47. H2SO4 is the chemical formula for...
benefits of chromium
Scalene triangle
Value of the angle increases
Sulfuric acid
48. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
displacement
Greater than 180 degrees
Be the same at any point in the process
Stray current corrosion
49. When classifying beams - the term simple beam refers to a beam
That is supported at two ends
Chlorides
A / SinA = b / SinB = c / SinC
Mensuration
50. 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
Stress corrosion cracking
Latent heat of evaporation
The equilibrant
Continuity flow
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