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3b2 quiz 3

Beschreibung

power engineering 3b2 Quiz am 3b2 quiz 3, erstellt von TRAVIS CANNING am 26/02/2016.
TRAVIS CANNING
Quiz von TRAVIS CANNING, aktualisiert more than 1 year ago
TRAVIS CANNING
Erstellt von TRAVIS CANNING vor etwa 8 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
While gas turbines exist in many different designs, every gas turbine has three major components, compressor section, combustion section, and:
Antworten
  • Turbine section
  • Shell section
  • Steam section
  • Low pressure section
  • High pressure section

Frage 2

Frage
Ambient air entering the combustion chamber is first pressurized to about (?) Kpa
Antworten
  • 50 to 100
  • 500 to 1000
  • 1100 to 3000
  • 3000 to 5000
  • 5000 to 10000

Frage 3

Frage
In the single shaft arrangements the compressor, turbine and load are all connected and rotate
Antworten
  • Opposite of one another
  • Counterclockwise
  • Clockwise
  • Together
  • None of the above

Frage 4

Frage
A disadvantage of a closed style gas turbine is:
Antworten
  • Cooling water is needed
  • The working fluid is dirty
  • Only cheap fuel can be used
  • The working fluid may support combustion
  • Low pressure, Low output

Frage 5

Frage
A gas turbine installation involves a number of additional components, systems and equipment that vary widely depending on the type of gas turbine, its location, environmental conditions and:
Antworten
  • Cost
  • Size
  • Application
  • Pressure rating
  • None of the above

Frage 6

Frage
Many gas turbines are contained in an enclosure that protects it from the environment, provides protection for personnel in case of failure and:
Antworten
  • Keeps costs down
  • Keep it clean
  • Prevent damage
  • Reduce noise

Frage 7

Frage
Modern gas turbines are able to reach efficiencies of (?) in simple cycle mode without the cycle improvements or combined cycle:
Antworten
  • 5-10%
  • 15-20%
  • 25-30%
  • 35-40%
  • 45-50%

Frage 8

Frage
On a gas turbine the most common cycle improvements to be made is:
Antworten
  • Inter cooling
  • After cooling
  • Reheating
  • Combined cycle
  • Regeneration

Frage 9

Frage
A highly efficient and capable compressor is critical for the efficient operation of a gas turbine. Two types of compressors are used in gas turbines are Centrifugal and:
Antworten
  • Differential
  • Positive flow
  • Negative flow
  • Radial
  • Axial

Frage 10

Frage
Advantages of the radial or compressor are simplicity, short length and:
Antworten
  • Cost
  • Size
  • Strength
  • Noise reduction
  • Power

Frage 11

Frage
For a gas turbine there are three basic designs for combustors. The can-annular, annular and:
Antworten
  • Annular-can
  • Can
  • Single can
  • Double can
  • None of the above

Frage 12

Frage
About (?) per cent of the air entering the combustor is mixed with the fuel in the flame tube as combustion air; the remainder flows on the outside of the tube and services as cooling air.
Antworten
  • 10
  • 20
  • 30
  • 40
  • 50

Frage 13

Frage
Turbines can be of the axial-flow or (?) type:
Antworten
  • Differential flow
  • Radial flow
  • Radial inflow
  • Axial inflow
  • None of the above

Frage 14

Frage
What is used in blade cooling on a gas turbine?
Antworten
  • Air
  • Oxygen
  • Nitrogen
  • Fans
  • All of the above

Frage 15

Frage
An automatic emergency trip system closes the main fuel shutoff valve if:
Antworten
  • The Lubricating oil pressure drops to an unsafe pressure
  • The exhaust temperature exceeds the allowable limit
  • Either of the rotor speed becomes excessive
  • All of the above
  • None of the above

Frage 16

Frage
A number of protective devices will first alarm and then shutdown the engine if certain levels are exceeded. They normally protect against:
Antworten
  • Power turbine overspeed
  • Exhaust gas temperatures higher than the maximum limit
  • Excessive vibration
  • Excessive oil and bearing temperatures
  • All of the above

Frage 17

Frage
The temperature of the air entering the gas turbine has a great impact on its operation and performance. As the air temperature decreases, its
Antworten
  • Density decreases
  • Density increases
  • Pressure increases
  • None of the above
  • Pressure decreases

Frage 18

Frage
A gas turbine will produce more power at:
Antworten
  • Higher temperatures
  • Lower temperatures
  • Higher pressures
  • Lower pressures
  • All of the above

Frage 19

Frage
All lubricating systems provide two basic functions, to lubricate sliding surfaces in the bearing and:
Antworten
  • Keep the bearing clean
  • Cool the bearings
  • Keep water away
  • Reduce corrosion
  • All of the above

Frage 20

Frage
Gas turbines use two different types of bearings, Antifriction bearings and:
Antworten
  • Greased bearings
  • Roller
  • Ball
  • Radial
  • Rotor

Frage 21

Frage
Maintenance of fuel gas systems are relatively maintenance free and automatic protection is usually provided. Maintenance operators may do consist of:
Antworten
  • Checking for fuel gas leaks
  • Monitoring pressure and temperature
  • Changing fuel filters
  • Calibrating instrumentation and testing protective devices
  • All of the above

Frage 22

Frage
Fuel for a gas turbine that would promote the most efficient combustion and produce the lowest environmental emissions world be:
Antworten
  • Methane
  • Ammonia
  • Natural gas
  • Fuel gas
  • Kerosene

Frage 23

Frage
A gas turbine can operate on a wide range of liquid fuels such as blended heavy distillantes, residuals and heavy ash crudes, and:
Antworten
  • Distillantes
  • Blended ash crudes
  • Low ash crudes
  • All of the above
  • None of the above

Frage 24

Frage
A liquid fuel which requires considerable cleaning and treatment would be:
Antworten
  • Kerosene
  • Distillants
  • Low ash crudes
  • Blended heavy distillants
  • Heavy ash crudes

Frage 25

Frage
NOx Emissions are formed during combustion from the reaction of:
Antworten
  • Water or steam
  • Soda ash
  • Lime
  • Air
  • None of the above

Frage 26

Frage
What system can be used to provide the initial rotation of the main compressor?
Antworten
  • Pneumatic starters using compressed air or gas
  • Electric motors
  • Small diesel engines
  • Steam turbine expanders
  • All of the above

Frage 27

Frage
What problems to sagging or bowing cause in a gas turbine?
Antworten
  • Prevent start up
  • High vibration
  • Excessive heat
  • A and B
  • None of the above

Frage 28

Frage
Various methods of inlet cooling used today are spray cooling, fog cooling and:
Antworten
  • Special evaporative pads
  • Steam cooling
  • Water pan cooling
  • Forced Air cooling
  • Natural air cooling

Frage 29

Frage
Anti-icing systems may operate by:
Antworten
  • Beating off the ice
  • Installing heating coils
  • Feeding heated air from some other source into air intake
  • B and C
  • None of the above

Frage 30

Frage
In an internal combustion engine what are the three major types of fuels?
Antworten
  • Gasoline, Diesel, and kerosene
  • Gasoline, Natural gas, Gaseous fuels
  • Gasoline, Fuel oils, and Diesel
  • Gasoline, Gaseous fuels, and Fuel oils
  • None of the above

Frage 31

Frage
For a normal shutdown of a gas turbine the procedure is basically the reverse of a startup procedure.
Antworten
  • True
  • False

Frage 32

Frage
When a fast shutdown for a gas turbine has been initiated the cooldown period is eliminated and the fuel valve is closed immediately.
Antworten
  • True
  • False

Frage 33

Frage
To perform an off-line waterwash, the engine is stopped and does not need to cool first.
Antworten
  • True
  • False

Frage 34

Frage
To perform an on-line wash the gas turbine is slowed slightly and has no need to cool.
Antworten
  • True
  • False

Frage 35

Frage
One major difference in a diesel engine compared to the gasoline engine is:
Antworten
  • One engine is larger then the other
  • Gasoline engines do not require a spark for ignition
  • Gasoline engines require compression for ignition
  • Diesel engines do not require a spark for ignition
  • All of the above

Frage 36

Frage
How many camshafts are there in a Combustion engine?
Antworten
  • 1
  • 2
  • 3
  • 4
  • 5

Frage 37

Frage
A cylinder head on a combustion engine is made of:
Antworten
  • Special Heat resisting cast iron
  • Aluminum
  • Steal
  • Heat treated nickel iron alloy
  • Heat treated Steal
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