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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. Gives perfect speed regulation 2. regulates turbine to a constant speed at all loads
isochronous governing
close cycle disadvantages
to reduce steam and blade velocities
steam expanding through stationary nozzles
2. 1. lowers power consumption 2. load changes frequently 3. pilot valve controls loading - adjustable
anaerobic
purpose of dry receiver
inlet air unloader advantages
First stage of gas turbine nozzles made of...
3. Nickel steel - strong fully balanced rotor - expensive
electronic overspeed trip
what large rotors are made of
thrust adjsusting gear
gas turbine efficiencies based on...
4. U- tubes - surface areas less than 18 cubic meters - has small heat transfer surface
hairpin hx
non - condensables
close cycle
Ammonia R-717
5. The change in sped that resutls from an increase in load
close cycle disadvantages
speed droop
cogeneration
methods to offset axial thrust
6. Use antifriction bearings
methods to detect cooling water leaks
sealing strips made of...
aero- derivative turbines
creep
7. Use teflon or carbon to lubricate system
capacity
feature of impulse turbine
'bottoming cycle'
oil free compressors
8. HCFC group - miscible in oil - boiling point of -40.8 but can be used down to -87
staging
R-22
double pipe hx
condenser tube attachment methods
9. Made of polyethylene - skimming from the surface
water/oil separator
pressure compounding
surface condenser
cogeneration reduces energy costs by...
10. 1. individual pump system 2. distributor system 3. common rail system
Prevent thermal stresses
solid injection designs
nozzels made of...
gas turbine blades should be replaced every
11. 1. contact - 'jet' 2. surface
condenser types
types of reboilers
mirco cogeneration advantages
4 stroke internal combustion
12. The condenser
typical temperature for outlet on oil coolers
mechanical drive turbine
largest hx in a plant is...
2 major factos affecting gas turbine efficiency and power
13. Has the highest level of thermal efficiency - low capital costs - fast start up - quick to build - low maint cost
single shaft combine cycle cogeneration
coagulant aids
4 stroke internal combustion
rotary compressor types
14. 1. single acting 2. double acting 3. two stage 4. tandem (first stage double acting - 2nd single) 5. free piston
types of reciprocation compressors
pressure- velocity compounding
components of PM program
regulation compressor systems
15. Cannot go below -18
types of fired heaters
sodium chloride
First stage of gas turbine nozzles made of...
extraction governor
16. Sagging and hogging - 20-40rpm
aerobic
barring gears prevent
crossflow
turbine casings
17. 1. titling pad Kingsbury (journal bearing) 2. Michel thrust bearing
reaction turbines use ____ bearings
mechanical drive turbine
BOD (biological oxygen demand)
difference between diesel and gas engines
18. Refers to the production of power during overload demands
bakpressure turbines
bay
higher compression ratios needed at...
peak power
19. Equal and opposite reation
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20. 1. use clean burning fuels 2. less fuel being used - saving energy reserves 3. electrical production onsite lowers construction demands for new sites and reduces transmission line power losses
waste water treatment plant components
marco cogeneration advantages
regulation compressor systems
hx principles
21. Controlled pressure from intermediate stages of turbine
clean turbine blading with
extraction governor
Pressure below atmospheric
inlet air unloader advantages
22. HFC group - zero ozone depletion - nonflammable and nonexplosive - boiling point of -26.2 - miscibility problem with minerial oil - use sythetics ester based
R-134a
creep
mirco cogeneration advantages
largest hx in a plant is...
23. 1. backpressure 2. condensate levels 3. contanimation 4. vacuum pay- off relays (10 to 40kPa) 5. vacuum trip relays (50kPa)
condenser safety devices
refrigerant evaporator
aerobic
compressor displacement
24. Polymers (polyelectrolytes)
critical pressure
double- flow in reaction turbines
coagulant aids
refrigeration system charging
25. Servomotors
power oil
selective catalytic reduction (SCR)
types of fired heaters
servo motor
26. Cause high discharge pressures - more power requirements - reduces capacity
non - condensables
fluid/air cooler
hx principles
saturated air
27. A concentrated solution at its critical point
turbine casings
nozzels made of...
eutectic solution
anoxic
28. Non - condensing turbine exhaust steam at...
pressure- velocity compounding
Above or at atmospheric pressure
bank
compressor displacement
29. Produce and maintain a vacuum at the turbine exhaust allowing steam to expand to a lower pressure and do more work
project management
close cycle disadvantages
surface condenser
sodium chloride
30. Calcium chloride and water - -51
brine
double pipe hx
bank
disc rotors
31. Radiator type
cogeneration
fluid/air cooler
sodium chloride
aerobic
32. Ground water monitoring device
Piezometer wells
single point fuel injection
'gas turbine'
'turbine'
33. 1. planning 2. implementation 3. review
'turbine'
Pressure below atmospheric
project management
jacking oil system
34. No dissolved oxygen but does contain nitrates
lube oil system basic functions
salometer
gas turbine disadvantages
anoxic
35. 1. need cooling water 2. low hx efficiencies 3. complex in size - increase in costs
barring gears prevent
centrifugal air compressors advantages
close cycle disadvantages
mirco cogeneration advantages
36. 0.577 times the inlet pressure
impulse force
purpose of a wet receiver
gas turbine blades should be replaced every
critical pressure
37. 1. compression ration across compressor 2. turbine inlet temperature
condenser safety devices
2 major factos affecting gas turbine efficiency and power
condenser types
sprial valve
38. Wrist pins that connect pistons to rod - retained bu circlips
unit
expansion valve
aerobic
gudgeon pins
39. 1. kettle 2. thermosyphon horizontal 3. thermosyphon vertical
condenser safety devices
purpose of dry receiver
duct burners in HRSG
types of reboilers
40. Have advantage of high efficiencies - 10% greater than centrifugal compressors
a tandem turbine coupled by flexible couplings
critical path method (CPM)
axial air compressors
balancing pipe
41. Reduces steam pressure and velocity in two or more steps
pressure- velocity compounding
jet condensers
barring gears prevent
a tandem turbine coupled by flexible couplings
42. Contains 0.5kg of moisture for every 28 cubic meter of air
rotary compressor types
magneto ignition
avoid surging
saturated air
43. Defined as one or more tube bundle - served by two or more fans complete with aux equipment
hairpin hx
moisture separator
surface condenser
bay
44. Working fluid is compress then preheated in regenerator
air leak tolerated in condenser up to...
gas turbine advantages
diesel engines aka
close cycle
45. Monel metal - high tensile strength - nickel copper alloy
nozzels made of...
waste water treatment purpose
centrifugal air compressor disadvantages
axial air compressors
46. KW at 15C standard at sealevel with 60% RH
two stage refrigeration system
base load
mechanical overspeed trip
gas turbine efficiencies based on...
47. 1. deman reservoir 2. avoid overloading compressor 3. dampens deew point and temperature spikes rom air dryer
hunting
baffle pitch
balancing pipe
purpose of dry receiver
48. 1. plate 2. channel
steam expanding through stationary nozzles
compressor valve types
refrigerant groups
air leaks in condensers
49. Admirally brass or Munte metal - 25-40mm thick
a tandem turbine coupled by flexible couplings
condenser tube sheets made of...
hairpin hx
air ejectors
50. Steam expands and pressure drops as it passes through moving blades - unbalance pressure
reaction turbine
single flow turbines
double- flow in reaction turbines
pressure drop across first row of reation turbine
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