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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. When calculating the ultimate stress of a material - we should
Dividing the ultimate strength by the factor of safety
Divide the maximum load by the original cross - sectional area
displacement
Total heat required for change of state
2. The most common material used in making large industrial diesel engine pistons is...
One angle is exactly 90 degrees
Cast iron
distance
To calculate power from an engine
3. One is the trigonometric value of...
A. sine of 90
Cast iron
Problem solving order
Areas of sectors (bounded by 2 radii and arc between them)
4. Of a process or change taking place at constant temperature - PV = C
The equilibrant
Cast iron
Isothermal
brinell hardness test
5. A gas occupies 8.62 m3 at 1800 kPa and 26
0.0723
179.02
161
benefits of chromium - nickel and copper in alloy steels
6. Force
A
basic oxygen process
The elastic limit of the material is not exceeded
Mass x acceleration (N)
7. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Complementary angles
View of a cutting plane
distance
Material balance
8. The most common thread used in North America on fasteners such as bolts - is the...
benefits of chromium
Unified National
A / SinA = b / SinB = c / SinC
Calorimetry
9. A scalar quantity is one which has only magnitude and can be fully described by...
Conditions required to produce sulphide corrosion cracking
Isosceles triangle
A number with the necessary unit
polytropic
10. Expansion of a gas is said to be adiabatic when expansion takes place at...
Falling temperature
Output power(W)/input power(W)
hardness
polytropic
11. PFDs
Chord
Be the same at any point in the process
Hooke's Law
Process flow drawing
12. Stainless fails due to...
Trapezoid
Chlorides
Latent heat of evaporation
Less than 90 degrees
13. A body having a gravitational force of 2000 N - is pulled along a horizontal surface at constant speed by a rope that makes an angle of 20
0.0723
0.0002
Isosceles triangle
Coefficient of friction
14. PV=nRT - Boyle's law and Charle's law combined
Ideal mechanical advantage
Conditions required to produce sulphide corrosion cracking
General gas law
Hooke's Law
15. Copper fails due to...
Rhomboid
brinell hardness test
Ammonia
10.8 m N of W
16. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
Conditions required to produce sulphide corrosion cracking
Divide the maximum load by the original cross - sectional area
linear motion relationships
8908 kJ
17. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
26.81 m/s
hexagon
Octagon
One
18. Being made of 2 or more substances creating unique characteristics and properties when combine
Sulfuric acid
Composite material
Permanent and removable
benefits of chromium
19. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
1 cm
Stroke
A solution
Resultant
20. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Ultimate stress/working stress
Celsius
Opposite side / hypotenuse
26.81 m/s
21. 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
Output power(W)/input power(W)
Octagon
26.81 m/s
Stroke
22. 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
Conditions required to produce sulphide corrosion cracking
dryness fraction
10.8 m N of W
A. sine of 90
23. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Isosceles triangle
161
Relative density
Specific heat
24. The ability to return to its original shape after an external force has been removed
distance
Specific heat
hardness
elasticity
25. Malleable cast iron is produced by...
Heating and cooling white cast iron at a controlled rate
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Ideal mechanical advantage
brinell hardness test
26. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Isothermal
Details of P & IDs
One angle is exactly 90 degrees
displacement
27. A 1 N weight has a kinetic energy of 1 J when its speed is...
70 MPa
Naperian (Natural) logarithms
Trapezium
4.4 m/s
28. A parallelogram with four equal sides
Problem solving order
Naperian (Natural) logarithms
hardness
Rhombus
29. Is the required to change a unit mass from a gas to liquid or liquid to a gas
Pm x A x L
Dividing the ultimate strength by the factor of safety
latent heat of evaporation (vaporation)
Cathodic protection system
30. P & IDs
benefits of copper
Rhombus
Mechanical flow diagrams
Chlorides
31. The classes of fastening devices are...
A
Gamma - coefficient of superficial = 2x coefficient of linear expansion
Permanent and removable
hardness
32. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Mass x acceleration (N)
Total heat required for change of state
45 kN
Resultant
33. Obtuse angle
Output power(W)/input power(W)
Toughness
Ultimate stress/working stress
More than 90 degrees
34. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
Specific heat
Falling temperature
velocity
A Greek letter alpha linear
35. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
Naperian (Natural) logarithms
effective pressure
Chord
Trapezium
36. Work per second
Relative density
Pm x A x L x N
Boyle's law
Process flow drawing
37. 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?
Tangent
2.3026
Octagon
45 kN
38. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
Purpose of material balance
Unified National
A twisting or turning effect
Stroke
39. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
The specific heat of the material
Continuity flow
The elastic limit of the material is not exceeded
latent heat of evaporation (vaporation)
40. Work per power stroke (J)
Divide the maximum load by the original cross - sectional area
Ideal mechanical advantage
Pm x A x L
A twisting or turning effect
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)
Opposite side / hypotenuse
Dividing the ultimate strength by the factor of safety
linear motion relationships
Ammonia
42. Negative terminal of the rectifier must always be connected to the structure that is being protected
water equivalent
Sulfuric acid
Mensuration
Cathodic protection system
43. The most common scale in use is the...
Celsius
Ammonia
Naperian (Natural) logarithms
0.0002
44. Change in tempereature where no heat in transferred - PV(supercript v) = C
Adiabatic
Mensuration
Sensible heat
benefits of chromium - nickel and copper in alloy steels
45. In the equation 0.004 + D = 0.0042 - the value of D is...
Specific heat
White metal and bronze
0.0002
Falling temperature
46. A pinch of salt is added to a glass of water. The result is...
A solution
Mensuration
Transformed to different forms
M x g x h (kg x 9.81 m/s/s x height (m))
47. Aka stray current electrolysis - caused be an external source of current - non intended paths due to poor electrical conductor
Stray current corrosion
Mass
Stroke
Composite material
48. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
polytropic
benefits of copper
Material balance
Stray current corrosion
49. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Total heat required for change of state
Sulfuric acid
Adiabatic
Power
50. A = arc length x radius / 2 - A = (pi/360) x pir2 - length of radii and angle between radii known
Areas of sectors (bounded by 2 radii and arc between them)
Specific heat
0.89
4.4 m/s