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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. Work done(J)/time(second) - unit of watts - 1 watt = 1 joule/second
Celsius
Work
Power
Tangent
2. A automobile travels at 60 miles per hour. Expressed in metres per second - this would be equivalent to...
26.81 m/s
Stroke
Cathodic protection system
0.0723
3. A closed plane figure bounded by straight sides
Exactly 180 degrees
A / SinA = b / SinB = c / SinC
polygon
Relative density
4. 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
Stroke
Purpose of P & IDs
Scalene triangle
Relative density
5. coefficient of superficial (area) expansion
Cast iron
Gamma - coefficient of superficial = 2x coefficient of linear expansion
velocity
Malleability
6. Work per power stroke (J)
Pm x A x L
Rhombus
Calorimetry
Stray current corrosion
7. The classes of fastening devices are...
Sensible heat
Isothermal
Transformed to different forms
Permanent and removable
8. The relationship between the pressure and volume of a gas at constant temperture; when volume increase - pressure decreases.
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9. 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)
Relative density
The equilibrant
linear motion relationships
Specific heat
10. Energy can be...
Increase
benefits of chromium
Transformed to different forms
2.3026
11. As the cosine decreases - the...
Value of the angle increases
The specific heat of the material
Pm x A x L
520.72 kJ/kg
12. Combines easily with many other elements - improves atmospheric corrosion resistance - increases strength - amounts of 0.15-0.25%
As a ratio
A twisting or turning effect
benefits of copper
Increase
13. The parts/fraction of steam that is dry is called dryness fraction - o expressed as a fraction - percentage or decimal
Be the same at any point in the process
Octagon
dryness fraction
hexagon
14. Of a process or change taking place at constant temperature - PV = C
Isothermal
Dividing the ultimate strength by the factor of safety
hexagon
Be the same at any point in the process
15. 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.
Octagon
brinell hardness test
benefits of nickel
Stress corrosion cracking
16. 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
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
One angle is exactly 90 degrees
Purpose of P & IDs
White metal and bronze
17. The working stress of a material that has an ultimate strength of 490 MPa and a safety factor of 7 would be...
A Greek letter alpha linear
latent heat of evaporation (vaporation)
benefits of copper
70 MPa
18. The precise measurement of heat flow out of a system for chemical and physical processes
Calorimetry
Work
Ammonia
Pm x A x L
19. 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
A = 4/3h2 [(square root)d/h-0.608]
0.0723
Divide the maximum load by the original cross - sectional area
Power
20. A scalar quantity is one which has only magnitude and can be fully described by...
Celsius
A number with the necessary unit
Cathodic protection system
Resultant
21. A 1 N weight has a kinetic energy of 1 J when its speed is...
effective pressure
4.4 m/s
Rhomboid
0.0002
22. 1.not showing temperatures or pressures 2. piping ID numbers and sizing 3. all instrumentation 4. piping details
That is supported at two ends
Unified National
Composite material
Details of P & IDs
23. One is the trigonometric value of...
View of a cutting plane
A. sine of 90
Isosceles triangle
One
24. 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
polytropic
Purpose of material balance
Octagon
View of a cutting plane
25. According to Hooke's Law - the stress in an elastic body is directly proportional to the strain if...
57.48 mm
The elastic limit of the material is not exceeded
Opposite side / hypotenuse
Toughness
26. 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
Less than 90 degrees
As a ratio
10.8 m N of W
27. Area of a segment
A = 4/3h2 [(square root)d/h-0.608]
benefits of chromium - nickel and copper in alloy steels
Ammonia
Divide the maximum load by the original cross - sectional area
28. Expansion of a gas is said to be adiabatic when expansion takes place at...
Pm x A x L x N
Falling temperature
Power
One angle is exactly 90 degrees
29. Safe working stress is determined by...
1/2mv2 (kg x velocity(m/s))
Octagon
Dividing the ultimate strength by the factor of safety
Calorimetry
30. Factor of safety
elasticity
45 kN
Ultimate stress/working stress
10.8 m N of W
31. A triangle with no two sides of equal length
Continuity flow
Purpose of material balance
Scalene triangle
Dividing the ultimate strength by the factor of safety
32. coefficient of expansion
57.48 mm
Heat engines
Problem solving order
A Greek letter alpha linear
33. A parallelogram with four equal sides
Be the same at any point in the process
Cathodic protection system
Details of P & IDs
Rhombus
34. The amount of heat required to completely melt 25 kg of ice from a temperature of -10
brinell hardness test
Relative density
8908 kJ
Output power(W)/input power(W)
35. A quadrilateral with two parallel sides
Under deposit corrosion - enhanced oxygen generation - contact of live organisms
Unified National
hardness
Trapezoid
36. 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?
Coefficient of friction
Mensuration
ellipse
45 kN
37. Any two angles whose sum is 90
Complementary angles
Trapezium
Octagon
Value of the angle increases
38. The most common material used in making large industrial diesel engine pistons is...
Sulfuric acid
4.4 m/s
Exactly 180 degrees
Cast iron
39. The term _____ is used as a measure of the quantity of matter.
Malleability
Output power(W)/input power(W)
Mass
Isothermal
40. Is a number that appears naturally in some higher- level mathematics is 2.71828 (correct to 5 decimal places)
linear motion relationships
Charles Law
Composite material
Naperian (Natural) logarithms
41. Copper fails due to...
Ammonia
Coefficient of cubical expansion is often used instead of 'volume' - coefficient of liquids only
View of a cutting plane
Ultimate stress/working stress
42. Orthographic projection means...
Greater than 180 degrees
520.72 kJ/kg
70 MPa
View of a cutting plane
43. Steam engines - steam turbines - gas turbines and internal combustion engines are examples of...
The elastic limit of the material is not exceeded
More than 90 degrees
Heat engines
A Greek letter alpha linear
44. 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
displacement
Toughness
Composite material
Relative density
45. Is seen in equations involving logarithms - it means that the formula is converting from one base system to another.
Problem solving order
2.3026
Stress corrosion cracking
Relative density
46. The pressure that should be used when calculating power - pressure is not constant throughout a power stroke - decreases as gas/steam expands
velocity
Trapezoid
Coefficient of friction
effective pressure
47. In the equation 0.004 + D = 0.0042 - the value of D is...
linear motion relationships
Specific heat
latent heat of evaporation (vaporation)
0.0002
48. 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...
10.8 m N of W
Purpose of material balance
polygon
M x g x h (kg x 9.81 m/s/s x height (m))
49. The temperature of saturated steam vapor at 980 kPa is...
179.02
benefits of copper
Mensuration
1/2mv2 (kg x velocity(m/s))
50. A straight line that joins 2 points or circumference
Pm x A x L
Chord
Relative density
Divide the maximum load by the original cross - sectional area