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Test your basic knowledge |
Power Engineering 2
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. 1. to increase steam production 2. control superheater temperatures 3. meet process demands
duct burners in HRSG
mechanical draft
adv of impulse turbine
aero- derivative turbines
2. Use teflon or carbon to lubricate system
balancing pipe
water/oil separator
bay
oil free compressors
3. DLN - reduce NOx down to 9ppm but have an increased combustion area
types of turbines
dry low NOx combustion systems
primary cogeneration output
'gas turbine'
4. 1. ferrules 2. metallic and fiber packing 3. roll expanding 4. combination - inlet end expanded and belled - outlet pakced or ferruled
cogeneration reduces energy costs by...
saturated air
inlet modulating valve advantages
condenser tube attachment methods
5. Control a steady backpressure - sensing element in exhuast line
nozzles types
types of turbines
brine
pressure sensitve governors
6. 1. activated sludge 2. rotating biological contactors 3. trickling filters
anaerobic digesters
air dryer types
biological removal of solids
rotary compressor control
7. Small pressure drop
angstrom particles
air leak tolerated in condenser up to...
convergent nozzles
impulse force
8. 1. vent to atmosphere 20% 2. condensing 30% 3. exhaust steam used for work 80%
plant thermal effificienies
types of turbines
electronic overspeed trip
cogeneration
9. Is the ratio of the discharge pressure to the intake pressure absolute
single point fuel injection
brine
compression ratio
capacity
10. Each stage seperated by partitions - nozzles set into diaphragms
suction line unloading valve advantages
extraction governor
capacity
pressure compounding
11. 5mm in diameter
water boxes
air leak tolerated in condenser up to...
typical temperature for outlet on oil coolers
ammonia compression cycle low side
12. More rounded than impulse blading
coalescing filters
2 stroke internal combustion
single shaft combine cycle cogeneration
reaction blading
13. Seperately forged discs or wheels and shrunk onto shaft
bay
water boxes
disc rotors
turbine casings
14. 1. thrust bearings 2. dummy pistions 3. thrust adjusting gear
air leak tolerated in condenser up to...
non - condensables
droop
methods to offset axial thrust
15. 1. sliding vane 2. rotary lobe 3. rotary screw ( convex male lobes - pulse free)
gas turbine blades should be replaced every
First stage of gas turbine nozzles made of...
condenser tube attachment methods
rotary compressor types
16. Very high speed with extremely high centrigufal force and high frictional losses
impulse turbine disadvantage
tandem compound turbines
a tandem turbine coupled by flexible couplings
liquid line aka
17. Has the highest level of thermal efficiency - low capital costs - fast start up - quick to build - low maint cost
inlet air unloader advantages
single shaft combine cycle cogeneration
'topping cycle'
compressor valve types
18. Calcium chloride and water - -51
brine
secondary cogeneration output
condenser tube attachment methods
anaerobic
19. Counter act force and load on thrust bearings
components of PM program
dummy pistons
govrenors classes
'topping cycle'
20. Air drawn from atmosphere - working fluid
axial air compressors
govrenors classes
open cycle
waste water treatment purpose
21. 1. increases net power 2. clean working fluid 3. cheap fuel can be used
2 major factos affecting gas turbine efficiency and power
regulation compressor systems
closed cycle advantages
plant thermal effificienies
22. 1. simple design 2. less piping 3. no freezing hazard
fluid/air cooler
balancing pipe
air cooling advantages over water cooling
methods to offset axial thrust
23. 1. high pressure cutout 2. oil pressure cutout 3. pressure relief devices
base load
newton's 2nd law
refrigeration safety controls
fluid/air cooler
24. Dry surface coolers - no contact convection hx - aka finned tube exchangers
aerial coolers
anoxic
mirco cogeneration advantages
reaction turbine components
25. Independant of the governor - inductive sensor (magnetic speed pickups)
natural draft cooling tower
Ammonia R-717
electronic overspeed trip
crosshead
26. Large pressure drop - increase volume to match the increase in steam volume and pressure decreases
convergent- divergent
bank
droop
air ejectors
27. Refers only to specificly to the turbine section
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28. Forced or induced draft
mechanical draft
single shaft combine cycle cogeneration
condenser tube attachment methods
mechanical overspeed trip
29. Sagging and hogging - 20-40rpm
water/oil separator
hairpin hx
counterflow
barring gears prevent
30. Air flow is horizontal
gudgeon pins
crossflow
mirco cogeneration advantages
R-134a
31. Monel metal - high tensile strength - nickel copper alloy
nozzels made of...
downflow condenser
air cooling advantages over water cooling
reduce cavitation in extraction pumps
32. Set of stationary nozzles and 2 sets of rotating blades - pressure drop occurs in stationary blades
velocity compounding
lube oil system basic functions
purpose of dry receiver
speed droop
33. No dissolved oxygen but does contain nitrates
anoxic
2 stroke internal combustion
velocity compounding
bay
34. Cooling of air between stages - condense below atmospheric temperature removing moisture - not primary function
types of turbines
tangs
double- flow in reaction turbines
intercoolers
35. 1. CCME 2. CEQG 3. CWQG 4. US EPA
feature of impulse turbine
government regualtions for waste water
environmental management program
double pipe hx
36. Equal and opposite reation
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37. Steam expands and pressure drops as it passes through moving blades - unbalance pressure
reaction turbine
extraction pumps usually are _____ type
electronic overspeed trip
surface condenser
38. Admirally brass or Munte metal - 25-40mm thick
types of turbines
purpose of compressor lubrication
air cooling advantages over water cooling
condenser tube sheets made of...
39. 1. verticle cyclinder 2. cabin heater 3. central tube wall
types of fired heaters
double flow turbines
condenser types
types of refrigerant evaporators
40. Reduces steam pressure and velocity in two or more steps
pressure- velocity compounding
plant thermal effificienies
dual shaft combined cycle cogeneration
methods to offset axial thrust
41. 1. contact - 'jet' 2. surface
balancing pipe
condenser types
double flow turbines
typical temperature for outlet on oil coolers
42. 1. high manufacturing costs 2. slow speed changes 3. low efficiencies at low throttle
gas turbine disadvantages
inlet cooling methods - evaporative
pressure- velocity compounding
a tandem turbine coupled by flexible couplings
43. 1. high power to weight ration 2. use of different liquids and gaseous fuels 3. start rapidly 4. simple and compact design 5. reliable 6. remote operation
single shaft combine cycle cogeneration
3 types of communication
gas turbine advantages
power oil
44. Up to 60-90%
cogeneration reduces energy costs by...
refrigerant groups
electronic overspeed trip
adv of impulse turbine
45. 1. deman reservoir 2. avoid overloading compressor 3. dampens deew point and temperature spikes rom air dryer
purpose of dry receiver
velocity compounding
closed cycle advantages
secondary cogeneration output
46. Change in momentum
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47. Higher power and speeds
gas turbine blades should be replaced every
environmental management program
bay
double flow turbines
48. Reduction of NOx through ammonia injection priot to catalyst - lowering NOx to 10ppm
selective catalytic reduction (SCR)
to reduce steam and blade velocities
impulse buckets
mirco cogeneration advantages
49. Removal of exhaust gases by blow air through
scavenging
environmental management program
methods to offset axial thrust
axial air compressors
50. The space wherein the liquid refrigerant absorbs heat and boils
dry low NOx combustion systems
solid injection designs
Ammonia R-717
refrigerant evaporator
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