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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. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
Mensuration
benefits of copper
Transformed to different forms
26.81 m/s
2. 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
Relative density
Exactly 180 degrees
Specific heat
Output power(W)/input power(W)
3. A parallelogram with four equal sides
Greater than 180 degrees
Rhombus
A / SinA = b / SinB = c / SinC
0.0002
4. 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
0.0002
10.8 m N of W
Cast iron
5. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
8908 kJ
Increase
To calculate power from an engine
Scalene triangle
6. The most common material used in making large industrial diesel engine pistons is...
Toughness
A
Output power(W)/input power(W)
Cast iron
7. Resistance to wear - abrasion and penetration
hardness
effective pressure
Work
0.0002
8. 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?
Greater than 180 degrees
45 kN
benefits of chromium
A number with the necessary unit
9. When the co- efficient of friction increases and the force between two surfaces remains constant - the friction force will
Sensible heat
Increase
basic oxygen process
A solution
10. Mechanical efficiency
brinell hardness test
Output power(W)/input power(W)
Value of the angle increases
Boyle's law
11. 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
Specific heat
Stray current corrosion
Ammonia
Continuity flow
12. The ability to return to its original shape after an external force has been removed
elasticity
57.48 mm
Heat engines
Unified National
13. Cosine rule
Adiabatic
Mensuration
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
A
14. Work per power stroke (J)
Permanent and removable
Mass
Pm x A x L
water equivalent
15. 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% -
White metal and bronze
benefits of nickel
8908 kJ
Malleability
16. Factor of safety
Problem solving order
Areas of sectors (bounded by 2 radii and arc between them)
4.4 m/s
Ultimate stress/working stress
17. If a right- angle triangle has an angle of 28O 37' and the hypotenuse is 120 mm - the length of the opposite side is...
The equilibrant
benefits of chromium - nickel and copper in alloy steels
General gas law
57.48 mm
18. Velocity ratio is...
Ideal mechanical advantage
Charles Law
Conditions required to produce sulphide corrosion cracking
The equilibrant
19. A closed plane figure bounded by straight sides
Cast iron
Dividing the ultimate strength by the factor of safety
polygon
Stray current corrosion
20. When calculating the ultimate stress of a material - we should
More than 90 degrees
Areas of sectors (bounded by 2 radii and arc between them)
Divide the maximum load by the original cross - sectional area
Celsius
21. The most common thread used in North America on fasteners such as bolts - is the...
1 cm
Unified National
Trapezium
Stray current corrosion
22. Sine Rule
Power
A solution
One
A / SinA = b / SinB = c / SinC
23. Work per second
Pm x A x L x N
57.48 mm
Stress corrosion cracking
0.0002
24. Stainless fails due to...
Chlorides
distance
4.4 m/s
A
25. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
The elastic limit of the material is not exceeded
Heat engines
45 kN
Mass x acceleration (N)
26. Means that the sum of the matter leaving the plant equals the sum of the matter entering
Material balance
linear motion relationships
Total heat required for change of state
To calculate power from an engine
27. Whether a material will break under sudden impact or hard blow
Relative density
Toughness
Dividing the ultimate strength by the factor of safety
Less than 90 degrees
28. 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
Pm x A x L
A number with the necessary unit
ellipse
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
29. P & IDs
Pm x A x L x N
polygon
Mechanical flow diagrams
Trapezoid
30. One is the trigonometric value of...
Stroke
Divide the maximum load by the original cross - sectional area
A. sine of 90
Scalene triangle
31. Is the heat being added or removed to/from a substance without a change of state - still having a changing in temp
Sensible heat
A / SinA = b / SinB = c / SinC
Composite material
dryness fraction
32. Any two angles whose sum is 90
Toughness
Complementary angles
More than 90 degrees
A
33. Reflex angle
Unified National
0.89
A
Greater than 180 degrees
34. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
displacement
161
effective pressure
70 MPa
35. Negative terminal of the rectifier must always be connected to the structure that is being protected
linear motion relationships
Cathodic protection system
26.81 m/s
Cast iron
36. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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on line
183
37. Refers to the length of the actual path over which a body travels - not concerned with direction - magnitude only
displacement
Problem solving order
distance
A twisting or turning effect
38. Ability to withstand deformation above elastic limit under compression without failure
8908 kJ
Pm x A x L x N
Malleability
Stray current corrosion
39. coefficient of expansion
latent heat of evaporation (vaporation)
A Greek letter alpha linear
Areas of sectors (bounded by 2 radii and arc between them)
Adiabatic
40. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
Work
benefits of copper
Exactly 180 degrees
Details of P & IDs
41. Testing metals and nonmetals of low to medium hardness. uses a ball that is pressed into material and basis calculations on the diameters of ball and indentation.
Opposite side / hypotenuse
brinell hardness test
elasticity
A
42. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
Heat engines
To calculate power from an engine
26.81 m/s
8908 kJ
43. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
2.3026
1/2mv2 (kg x velocity(m/s))
polygon
26.81 m/s
44. Is the rate a body moves in a specific direction - direction must be specified - velocity(m/s) = displacement(m)/time(s)
520.72 kJ/kg
velocity
Cast iron
Divide the maximum load by the original cross - sectional area
45. A gas occupies 8.62 m3 at 1800 kPa and 26
0.0002
elasticity
161
Material balance
46. 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
Latent heat of evaporation
110.6 kPa
effective pressure
47. PVn(super script n) = C
A
polytropic
Malleability
displacement
48. PFDs
dryness fraction
White metal and bronze
effective pressure
Process flow drawing
49. 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
Chlorides
Mechanical flow diagrams
57.48 mm
Coefficient of friction
50. Force
polygon
Unified National
Mass x acceleration (N)
Stroke