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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. Of a process or change taking place at constant temperature - PV = C
hardness
Mechanical flow diagrams
benefits of nickel
Isothermal
2. 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
benefits of nickel
Heat engines
Chlorides
3. A 10 m long steel pipe when heated to increase its temperature by 85
1 cm
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
effective pressure
As a ratio
4. Expansion of a gas is said to be adiabatic when expansion takes place at...
Conditions required to produce sulphide corrosion cracking
Work
Falling temperature
Coefficient of friction
5. Sine Rule
A / SinA = b / SinB = c / SinC
Less than 90 degrees
520.72 kJ/kg
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
6. A straight line that joins 2 points or circumference
Chord
Increase
A
179.02
7. Any two angles whose sum is 90
A Greek letter alpha linear
Stress corrosion cracking
Complementary angles
Stroke
8. Pm = mean effective pressure (Pa) - A= area of piston (m2) - L= length of stroke (m) - N= number of power strokes per second
Heating and cooling white cast iron at a controlled rate
To calculate power from an engine
M x g x h (kg x 9.81 m/s/s x height (m))
Celsius
9. Right angle
A. sine of 90
One angle is exactly 90 degrees
Mass
elasticity
10. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Continuity flow
Hooke's Law
White
26.81 m/s
11. Compounds classified as salts may have the following characteristics
Coefficient of friction
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
Relative density
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
12. The ratio of the density of a substance to the density of a standard substance at the same temperature and pressure - the ratio of the density of the substance to the density of the substance to the density of water
Sulfuric acid
Relative density
General gas law
Value of the angle increases
13. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Trapezium
basic oxygen process
Ideal mechanical advantage
Sensible heat
14. When calculating the ultimate stress of a material - we should
Divide the maximum load by the original cross - sectional area
Permanent and removable
Octagon
View of a cutting plane
15. Stainless fails due to...
Chlorides
Greater than 180 degrees
Output power(W)/input power(W)
A solution
16. The factor of safety is always expressed...
As a ratio
0.0723
elasticity
110.6 kPa
17. Is the required to change a unit mass from a gas to liquid or liquid to a gas
The specific heat of the material
Total heat required for change of state
latent heat of evaporation (vaporation)
Purpose of P & IDs
18. P & IDs
A
Trapezium
Mechanical flow diagrams
0.89
19. Ability to withstand deformation above elastic limit under compression without failure
Malleability
A
A twisting or turning effect
water equivalent
20. A 1 N weight has a kinetic energy of 1 J when its speed is...
4.4 m/s
10.8 m N of W
Chlorides
26.81 m/s
21. Whether a material will break under sudden impact or hard blow
latent heat of evaporation (vaporation)
10.8 m N of W
A = 4/3h2 [(square root)d/h-0.608]
Toughness
22. A parallelogram with four equal sides
Boyle's law
displacement
Value of the angle increases
Rhombus
23. Potential energy (Ep)
Trapezoid
linear motion relationships
polygon
M x g x h (kg x 9.81 m/s/s x height (m))
24. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
effective pressure
Work
Mechanical flow diagrams
A
25. As the cosine decreases - the...
Value of the angle increases
A / SinA = b / SinB = c / SinC
Rhomboid
Unified National
26. When classifying beams - the term simple beam refers to a beam
Mechanical flow diagrams
That is supported at two ends
Power
Be the same at any point in the process
27. H2SO4 is the chemical formula for...
Sensible heat
A number with the necessary unit
57.48 mm
Sulfuric acid
28. Safe working stress is determined by...
0.0002
10.8 m N of W
Dividing the ultimate strength by the factor of safety
displacement
29. Use of the equation PV = a constant - means the numerical result of pressure times volume for a compression or expansion process will
Stray current corrosion
benefits of chromium - nickel and copper in alloy steels
Be the same at any point in the process
Isothermal
30. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
velocity
A. sine of 90
displacement
Ammonia
31. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
hexagon
57.48 mm
The specific heat of the material
Rhomboid
32. If 10 m3 of a gas at a pressure of 20 kPa (gauge) and a temperature of 10
161
110.6 kPa
Cast iron
More than 90 degrees
33. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Material balance
ellipse
26.81 m/s
179.02
34. A scalar quantity is one which has only magnitude and can be fully described by...
Less than 90 degrees
brinell hardness test
Scalene triangle
A number with the necessary unit
35. A quadrilateral with two parallel sides
General gas law
To calculate power from an engine
The elastic limit of the material is not exceeded
Trapezoid
36. Pythagoras' Theorem
Charles Law
A
Trapezoid
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
37. The total direction traveled by the piston within a cylinder power stroke - if pressure is being applied during the stroke
57.48 mm
Output power(W)/input power(W)
Stroke
hardness
38. Negative terminal of the rectifier must always be connected to the structure that is being protected
Cathodic protection system
110.6 kPa
Work
A number with the necessary unit
39. Factor of safety
Ultimate stress/working stress
Malleability
Composite material
Resultant
40. A polygon with 6 sides A = 0.433s2 for equilateral triangle - therefore a hexagon A = 6 x 0.433s2 or A = 2.6s2
One
A Greek letter alpha linear
hexagon
Coefficient of friction
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)
linear motion relationships
Greater than 180 degrees
Permanent and removable
70 MPa
42. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Resultant
Total heat required for change of state
Composite material
110.6 kPa
43. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
Material balance
Adiabatic
Specific heat
Permanent and removable
44. PV=nRT - Boyle's law and Charle's law combined
110.6 kPa
Areas of sectors (bounded by 2 radii and arc between them)
General gas law
8908 kJ
45. A gas occupies 8.62 m3 at 1800 kPa and 26
water equivalent
Divide the maximum load by the original cross - sectional area
161
Boyle's law
46. Copper fails due to...
Rhombus
Heating and cooling white cast iron at a controlled rate
Cast iron
Ammonia
47. 1. In a right angle triangle - the sine of an acute angle is equal to...
Resultant
161
Stray current corrosion
Opposite side / hypotenuse
48. coefficient of volumetric expansion
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49. PFDs
Specific heat
Ultimate stress/working stress
Greater than 180 degrees
Process flow drawing
50. 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
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
A number with the necessary unit
benefits of copper
Conditions required to produce sulphide corrosion cracking