4661236
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
|
Creado por TRAVIS CANNING
hace más de 8 años
|
|
Pregunta 1
Pregunta
While gas turbines exist in many different designs, every gas turbine has three major components, compressor section, combustion section, and:
Respuesta
-
Turbine section
-
Shell section
-
Steam section
-
Low pressure section
-
High pressure section
Pregunta 2
Pregunta
Ambient air entering the combustion chamber is first pressurized to about (?) Kpa
Respuesta
-
50 to 100
-
500 to 1000
-
1100 to 3000
-
3000 to 5000
-
5000 to 10000
Pregunta 3
Pregunta
In the single shaft arrangements the compressor, turbine and load are all connected and rotate
Respuesta
-
Opposite of one another
-
Counterclockwise
-
Clockwise
-
Together
-
None of the above
Pregunta 4
Pregunta
A disadvantage of a closed style gas turbine is:
Respuesta
-
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
Pregunta 5
Pregunta
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:
Respuesta
-
Cost
-
Size
-
Application
-
Pressure rating
-
None of the above
Pregunta 6
Pregunta
Many gas turbines are contained in an enclosure that protects it from the environment, provides protection for personnel in case of failure and:
Respuesta
-
Keeps costs down
-
Keep it clean
-
Prevent damage
-
Reduce noise
Pregunta 7
Pregunta
Modern gas turbines are able to reach efficiencies of (?) in simple cycle mode without the cycle improvements or combined cycle:
Respuesta
-
5-10%
-
15-20%
-
25-30%
-
35-40%
-
45-50%
Pregunta 8
Pregunta
On a gas turbine the most common cycle improvements to be made is:
Respuesta
-
Inter cooling
-
After cooling
-
Reheating
-
Combined cycle
-
Regeneration
Pregunta 9
Pregunta
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:
Respuesta
-
Differential
-
Positive flow
-
Negative flow
-
Radial
-
Axial
Pregunta 10
Pregunta
Advantages of the radial or compressor are simplicity, short length and:
Respuesta
-
Cost
-
Size
-
Strength
-
Noise reduction
-
Power
Pregunta 11
Pregunta
For a gas turbine there are three basic designs for combustors. The can-annular, annular and:
Respuesta
-
Annular-can
-
Can
-
Single can
-
Double can
-
None of the above
Pregunta 12
Pregunta
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.
Respuesta
-
10
-
20
-
30
-
40
-
50
Pregunta 13
Pregunta
Turbines can be of the axial-flow or (?) type:
Respuesta
-
Differential flow
-
Radial flow
-
Radial inflow
-
Axial inflow
-
None of the above
Pregunta 14
Pregunta
What is used in blade cooling on a gas turbine?
Respuesta
-
Air
-
Oxygen
-
Nitrogen
-
Fans
-
All of the above
Pregunta 15
Pregunta
An automatic emergency trip system closes the main fuel shutoff valve if:
Respuesta
-
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
Pregunta 16
Pregunta
A number of protective devices will first alarm and then shutdown the engine if certain levels are exceeded. They normally protect against:
Respuesta
-
Power turbine overspeed
-
Exhaust gas temperatures higher than the maximum limit
-
Excessive vibration
-
Excessive oil and bearing temperatures
-
All of the above
Pregunta 17
Pregunta
The temperature of the air entering the gas turbine has a great impact on its operation and performance. As the air temperature decreases, its
Respuesta
-
Density decreases
-
Density increases
-
Pressure increases
-
None of the above
-
Pressure decreases
Pregunta 18
Pregunta
A gas turbine will produce more power at:
Respuesta
-
Higher temperatures
-
Lower temperatures
-
Higher pressures
-
Lower pressures
-
All of the above
Pregunta 19
Pregunta
All lubricating systems provide two basic functions, to lubricate sliding surfaces in the bearing and:
Respuesta
-
Keep the bearing clean
-
Cool the bearings
-
Keep water away
-
Reduce corrosion
-
All of the above
Pregunta 20
Pregunta
Gas turbines use two different types of bearings, Antifriction bearings and:
Respuesta
-
Greased bearings
-
Roller
-
Ball
-
Radial
-
Rotor
Pregunta 21
Pregunta
Maintenance of fuel gas systems are relatively maintenance free and automatic protection is usually provided. Maintenance operators may do consist of:
Respuesta
-
Checking for fuel gas leaks
-
Monitoring pressure and temperature
-
Changing fuel filters
-
Calibrating instrumentation and testing protective devices
-
All of the above
Pregunta 22
Pregunta
Fuel for a gas turbine that would promote the most efficient combustion and produce the lowest environmental emissions world be:
Respuesta
-
Methane
-
Ammonia
-
Natural gas
-
Fuel gas
-
Kerosene
Pregunta 23
Pregunta
A gas turbine can operate on a wide range of liquid fuels such as blended heavy distillantes, residuals and heavy ash crudes, and:
Respuesta
-
Distillantes
-
Blended ash crudes
-
Low ash crudes
-
All of the above
-
None of the above
Pregunta 24
Pregunta
A liquid fuel which requires considerable cleaning and treatment would be:
Respuesta
-
Kerosene
-
Distillants
-
Low ash crudes
-
Blended heavy distillants
-
Heavy ash crudes
Pregunta 25
Pregunta
NOx Emissions are formed during combustion from the reaction of:
Respuesta
-
Water or steam
-
Soda ash
-
Lime
-
Air
-
None of the above
Pregunta 26
Pregunta
What system can be used to provide the initial rotation of the main compressor?
Respuesta
-
Pneumatic starters using compressed air or gas
-
Electric motors
-
Small diesel engines
-
Steam turbine expanders
-
All of the above
Pregunta 27
Pregunta
What problems to sagging or bowing cause in a gas turbine?
Respuesta
-
Prevent start up
-
High vibration
-
Excessive heat
-
A and B
-
None of the above
Pregunta 28
Pregunta
Various methods of inlet cooling used today are spray cooling, fog cooling and:
Respuesta
-
Special evaporative pads
-
Steam cooling
-
Water pan cooling
-
Forced Air cooling
-
Natural air cooling
Pregunta 29
Pregunta
Anti-icing systems may operate by:
Respuesta
-
Beating off the ice
-
Installing heating coils
-
Feeding heated air from some other source into air intake
-
B and C
-
None of the above
Pregunta 30
Pregunta
In an internal combustion engine what are the three major types of fuels?
Respuesta
-
Gasoline, Diesel, and kerosene
-
Gasoline, Natural gas, Gaseous fuels
-
Gasoline, Fuel oils, and Diesel
-
Gasoline, Gaseous fuels, and Fuel oils
-
None of the above
Pregunta 31
Pregunta
For a normal shutdown of a gas turbine the procedure is basically the reverse of a startup procedure.
Respuesta
- True
- False
Pregunta 32
Pregunta
When a fast shutdown for a gas turbine has been initiated the cooldown period is eliminated and the fuel valve is closed immediately.
Respuesta
- True
- False
Pregunta 33
Pregunta
To perform an off-line waterwash, the engine is stopped and does not need to cool first.
Respuesta
- True
- False
Pregunta 34
Pregunta
To perform an on-line wash the gas turbine is slowed slightly and has no need to cool.
Respuesta
- True
- False
Pregunta 35
Pregunta
One major difference in a diesel engine compared to the gasoline engine is:
Respuesta
-
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
Pregunta 36
Pregunta
How many camshafts are there in a Combustion engine?
Respuesta
-
1
-
2
-
3
-
4
-
5
Pregunta 37
Pregunta
A cylinder head on a combustion engine is made of:
Respuesta
-
Special Heat resisting cast iron
-
Aluminum
-
Steal
-
Heat treated nickel iron alloy
-
Heat treated Steal
¿Quieres crear tus propios Tests gratis con GoConqr? Más información.