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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
One angle is exactly 90 degrees
Complementary angles
General gas law
A twisting or turning effect
2. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
Unified National
Output power(W)/input power(W)
effective pressure
Ammonia
3. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Increase
A / SinA = b / SinB = c / SinC
Sensible heat
Chord
4. Resistance to corrosion - improved properties at high and low temperatures - lowers coefficient of expansion
Malleability
A twisting or turning effect
benefits of chromium
benefits of chromium - nickel and copper in alloy steels
5. 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% -
Exactly 180 degrees
Stray current corrosion
benefits of nickel
Isosceles triangle
6. 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
ellipse
Be the same at any point in the process
1 cm
As a ratio
7. A quadrilateral with two parallel sides
Ultimate stress/working stress
Isosceles triangle
Trapezoid
Output power(W)/input power(W)
8. 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
A = 4/3h2 [(square root)d/h-0.608]
1 cm
Chord
Coefficient of friction
9. A gas occupies 8.62 m3 at 1800 kPa and 26
161
Areas of sectors (bounded by 2 radii and arc between them)
1 cm
26.81 m/s
10. Area of a segment
Stroke
A = 4/3h2 [(square root)d/h-0.608]
Problem solving order
water equivalent
11. 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)
10.8 m N of W
Ultimate stress/working stress
linear motion relationships
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
12. H2SO4 is the chemical formula for...
A / SinA = b / SinB = c / SinC
One angle is exactly 90 degrees
Sulfuric acid
520.72 kJ/kg
13. Ratio of the opposite to the adjacent side of a right- angled triangle
Ideal mechanical advantage
Cathodic protection system
Total heat required for change of state
Tangent
14. 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
benefits of chromium
10.8 m N of W
Problem solving order
Sulfuric acid
15. Sine Rule
A. sine of 90
A / SinA = b / SinB = c / SinC
Relative density
Process flow drawing
16. The temperature of saturated steam vapor at 980 kPa is...
179.02
Specific heat
Continuity flow
Naperian (Natural) logarithms
17. Force
Mass x acceleration (N)
Permanent and removable
0.0002
Charles Law
18. The act or process of measuring
White metal and bronze
Mensuration
A = 4/3h2 [(square root)d/h-0.608]
Divide the maximum load by the original cross - sectional area
19. Micro organisms promote corrosion...
Stray current corrosion
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Pm x A x L
Specific heat
20. Sensible heat + total latent heat - mc(specific heat) x delta t + mLf/mLe - Lf = latent heat of fusion - Le = latent heat of evaporation
Rhomboid
Total heat required for change of state
45 kN
Continuity flow
21. The term _____ is used as a measure of the quantity of matter.
One angle is exactly 90 degrees
Mass
A solution
water equivalent
22. A parallelogram with four equal sides
110.6 kPa
Pm x A x L x N
Boyle's law
Rhombus
23. The heat required to raise the temperature of water at a pressure of 225 kPa from 0
A Greek letter alpha linear
That is supported at two ends
520.72 kJ/kg
1/2mv2 (kg x velocity(m/s))
24. Quantity of heat required to change the temp of a unit mass of a substance by 1 degree
water equivalent
Dividing the ultimate strength by the factor of safety
Unified National
Specific heat
25. Cosine rule
Purpose of material balance
Gamma - coefficient of superficial = 2x coefficient of linear expansion
0.89
A
26. Work per second
Output power(W)/input power(W)
Pm x A x L x N
Cast iron
1. have a basic effect 2. have an acid effect 3. be neutral 4. change red litmus paper blue
27. 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
elasticity
White metal and bronze
Greater than 180 degrees
28. P & IDs
A number with the necessary unit
Mechanical flow diagrams
Less than 90 degrees
Value of the angle increases
29. Reflex angle
Rhomboid
Chord
Mass x acceleration (N)
Greater than 180 degrees
30. Steam turbine bearings are usually made of...
Charles Law
White metal and bronze
benefits of nickel
10.8 m N of W
31. As the cosine decreases - the...
Ideal mechanical advantage
General gas law
distance
Value of the angle increases
32. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Divide the maximum load by the original cross - sectional area
More than 90 degrees
Specific heat
dryness fraction
33. Negative terminal of the rectifier must always be connected to the structure that is being protected
Composite material
Cathodic protection system
Pm x A x L x N
A. sine of 90
34. 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
displacement
Purpose of P & IDs
Falling temperature
Resultant
35. Expansion of a gas is said to be adiabatic when expansion takes place at...
Falling temperature
White
Exactly 180 degrees
Value of the angle increases
36. Energy can be...
Transformed to different forms
Ammonia
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
Naperian (Natural) logarithms
37. A closed plane figure bounded by straight sides
displacement
polygon
Scalene triangle
benefits of chromium - nickel and copper in alloy steels
38. The precise measurement of heat flow out of a system for chemical and physical processes
General gas law
Resultant
Calorimetry
2.3026
39. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Celsius
Increase
Hooke's Law
Scalene triangle
40. Protons have a mass number of...
Resultant
benefits of chromium
Mass x acceleration (N)
One
41. A scalar quantity is one which has only magnitude and can be fully described by...
0.0723
distance
Pm x A x L x N
A number with the necessary unit
42. PVn(super script n) = C
polytropic
Falling temperature
That is supported at two ends
45 kN
43. Orthographic projection means...
A
Power
View of a cutting plane
Gamma - coefficient of superficial = 2x coefficient of linear expansion
44. A body can be put into equilibrium by applying an additional force equal in magnitude but opposite in direction to the...
Resultant
Scalene triangle
161
Problem solving order
45. 1. In a right angle triangle - the sine of an acute angle is equal to...
Opposite side / hypotenuse
0.0002
Conditions required to produce sulphide corrosion cracking
Falling temperature
46. 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
Exactly 180 degrees
Ammonia
The elastic limit of the material is not exceeded
47. Four pieces of iron are heated in a furnace to high temperatures. The one at the highest temperature would appear
White
Unified National
10.8 m N of W
57.48 mm
48. Obtuse angle
Isosceles triangle
More than 90 degrees
ellipse
Output power(W)/input power(W)
49. When calculating the ultimate stress of a material - we should
Trapezium
Sulfuric acid
Opposite side / hypotenuse
Divide the maximum load by the original cross - sectional area
50. 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
Adiabatic
Transformed to different forms
displacement
Stress corrosion cracking