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Test your basic knowledge |
Power Engineering 3
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. PLC control diagram
Fuel NOx
Ground
Ladder logic
Feedback trim
2. 1. line impedance starters - resistance in series for each phase 2. star- delta - using a special switch - inexpensive - current surge 3. auto- transformer - expensive - best starting torque
Reduced voltage methods
Hydrants
Amortisseur
Time lag fuses
3. Is the current in any line voltage - phase volts
Lenz's law
Long shunt
Synchronous motor advantage
1.73
4. One controlled variable and two manipulated variable as output - 'Duplex Controlres
Series wound generator
Split range control
Transfer switch delay
Ohm's law
5. Control of supply side disturbances by feedback - single loop
Types of transmission media
Cascade minimizes the effect on primary variable
AC rotors
Cascade control
6. Establish rules of safety covering the design - fabrication - and inspection during construction of boilers and pressure vessels - and to interpret these rules when questions arise
Offset
Armature reaction
Lead current
The function of the ASME Boiler and Pressure Vessel Committee
7. Expensive - externally mounted - not accurate for densisty changes
Conductance probes
Load cells
Ratio control
Complete combustion
8. Used in building over 3 stores - 14m
Cascade minimizes the effect on primary variable
Standpipe systems
Transfer switch delay
Parallel
9. Thermal coutout and a fuse link - cutout at 500% of normal current - greatest protection for motor currents
Time lag fuses
Transfer switch delay
Armature reaction
Crude petroleum
10. Faults in the system causing to break up into islands - an imbalance between the generator and the load
Cosine of phase angle
Control loop 4 basic functions
Excess air amount
Over frequency
11. Correct inductive loads - unit is called a farad (F) and the symbol used is 'c'
CRN 920.5193
Capacitance
Fuel NOx
Current flow
12. 1. pneumatic 2. electronic 3. optical
Inductance only affects currents when
Types of transmission media
4 types of fires
The purpose of the CSA B-51
13. 0.5 cubic meters (18 cubic feet)
Shunt wound generator
Piping systems with overs over ____ must be registered
Manhole exceeding allowed size as per pg 29.3
Pnuematic controls need boosters over
14. Always exist - as the gain increases the offset decreases
Cast iron should not be used
Offset
Class D
Piping systems with volumes over 0.5 cubic meters (18 cubic feet)
15. Point level measurement used to open or close a circuit
Weber
1.73
4.35kg of air
Conductance probes
16. Liquid being measured must be able to mix with the gas or air in the bubbler
Overheating protection
Reducing the amount of excess air...
3 combustible elements in any fuel
Disadvantage of bubblers
17. Load current is also the excitation current - never operate without a load - has high starting torque
Thermal NOx
Series motor
Electrostatic precipitators
PLCs
18. Pipe thickness must be increased by 15% or 3.0mm
Root mean square...
Split range control
Manhole exceeding allowed size as per pg 29.3
5 characteristics for suitable insulating materials
19. Have 2 conductors - example is telephone and radio currents
Petroleum cracking
MSDS
Resistance is dependant on...
Capacitors
20. I - NPS 63mm II - NPS 38mm III - NPS of bother 63mm and 38mm
3 classes of standpipes
Displacement between adjacent poles
Derivative control (RATE)
Removing fuses from live currents
21. Flammables and combustibles
Kirchhoff's law
Class F
Disadvantage of bubblers
Class B
22. Renewable resource and usually waste products of other process and uses
Conventional current flow
Fire response procedure
Main advantages of burning biomass fuels
Amortisseur
23. Is the total opposition - Z
5 characteristics for suitable insulating materials
Lightning arrestors
Capacitors
Impedance
24. All of the combustible in the fuel are completely burned and excess air
Amortisseur
Pressurized bubbler
3 classes of standpipes
Complete combustion
25. Material - size and temperature
Double bourdon tube...
Real power (watts)
Mmf (magnetomotive force)
Resistance is dependant on...
26. Refer to pg 27.2.1 of ASME academic extract - do not interpolate between values - select next higher rated value
Ampere
Automatic starters
Code calculations
Petroleum cracking
27. Large disturnbance and frequency could cause loop not to work properly - processes with large lag will not control
Disadvantage of bubblers
Disadvantage of feedback
Coal classification
Insulation major cause of...
28. Cells that create emf using light
Photovoltaic
Air
Atmospheric bubbler
Codes that have been adopted by various Canadian Jurisdictions
29. A venturi tube without a diverging section - more expensive - tubes can foul and hard to install
PLCs
Flow nozzle
Thermopile
Difference between upper and lower calorific values
30. Oscillate - on - off control behavior
Main function of a power distribution system
Gain increased too much
Motor action
Lap windings
31. Acts like on - off controller
Kirchhoff's law
Proportional band less than 2%
Electron flow
Under frequency
32. Allows control from one location
DCS
Torque in an armature
Shunt motor
Theoretical air
33. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage. Effective value
Root mean square...
Conventional flow
Coulomb
Ladder logic
34. Shunt parallel with the armature
Short shunt
Width of proportional band or gain determines
Power rating of a resistor
Cast iron should not be used
35. Terminal voltage decreases with increase of lead - field weakened by reduction of emf and it depends on the residual magnetism in the field circuit
Rheostat
Shunt wound generator
Reversal of power
NOx formation dependant on...
36. Occurs when some of the elements pass to the stack
Plug fuses
Manhole exceeding allowed size as per pg 29.3
Incomplete combustion
Long shunt
37. Casues the neutral plane within whcih brushes have been placed to shift - so that the brushes are now shorting the coils - which produce voltage (sparking) - use interpoles to neutralize condition
Current flow
Armature reaction
Excess air amount
Standyby power
38. Salient and cylindrical
Complete combustion
Automatic starters
Transmission media
AC rotors
39. Used in sealed or pressurized tanks
Pressurized bubbler
Pnuematic controls need boosters over
Ground
Return of normal power
40. Used up to 600V circuits - fuses are 250V and 600V made of zinc or alloy in a fiber tube. Amp sizes are 30 -60 -100 -200 -400 and 600A
3 factors affecting emf
Conventional current flow
Cartridge fuses
Hydrogen cooling
41. Quantity of current flow is inversely proportional to the resistance for a given voltage I = E/R
42. 180 degrees - one pole = one pitch
Amortisseur advantage
Compound wound generator
Displacement between adjacent poles
Supply label
43. The offset of a proportional controller decreases to maintain SP
Disadvantages of natural gas
Impediance triangle
As gain increases or the proportional band decreases
Ground
44. 6 times its normal full load current
Class D
Codes that have been adopted by various Canadian Jurisdictions
Anthracite
Induction motor will take a starting current up to...
45. Conencted to transformers or inside switchgears
Lightning arrestors
Resistance is dependant on...
The purpose of the CSA B-51
As gain increases or the proportional band decreases
46. Counter emf - current limit and time limit
Electron flow
Automatic starters
Disadvantage of bubblers
Advantages of natural gas
47. Work to elimate errors
Interpoles
Feedback control
DI
Workplace label
48. Can act as an induction motor - 3 directional inverse time overcurrent relays
Power in AC circuit
Dead generator energization protection
Heating value
If error appears quickly
49. Discrete input - on - off control
DI
Induction motor will take a starting current up to...
Cartridge fuses
Reactive power
50. Shunt parallel withe the armature and series field
Inductance in a pure inductive current
The purpose of separators and traps
'In phase'
Long shunt