4678223
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace alrededor de 8 años
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Pregunta 1
Pregunta
A dual shaft gas turbine has the following advantages
1. flexability in system configuration 2. lower first cost
3. smaller starting motors 4. higher operating pressures
Respuesta
-
1,2
-
1,3
-
1,4
-
2,3
-
3,4
Pregunta 2
Pregunta
A gas turbine that uses an intercooler during compression
Respuesta
-
has it located prior to compression
-
is located after the compressor but before the combustor
-
has a higher power output at the turbine
-
requires a larger starting motor
-
all of the above
Pregunta 3
Pregunta
Intercoolers are used on a gas turbine compressors to:
Respuesta
-
reduce the specific volume of the air
-
increase the dewpoint of the air
-
remove the moisture from the air
-
increase the combustor efficiency
-
increase compressor life
Pregunta 4
Pregunta
A reheater in a gas turbine cycle will:
1. compress more air 2. allow for smaller turbine blades
3. allow for a smaller combustor 4. improve the cycle efficiency
5. will require less air for the same turbine output
Respuesta
-
2,3,4
-
4,5
-
1,3,5
-
2,4
-
1,2,3,4,5
Pregunta 5
Pregunta
A regenerator in a gas turbine cycle is also referred to as:
Respuesta
-
heat exchanger
-
cyclone
-
duct burner
-
intercooler
-
safety device
Pregunta 6
Pregunta
A gas turbine
1. is a hot air engine 2. has a pressure ratio of 30 - 1
3. always use axial air compressors 4. uses a lower density working medium
Respuesta
-
1,2
-
2,3
-
3,4
-
1,4
-
2,4
Pregunta 7
Pregunta
The flow of air and shaft speed of a gas turbine are fairly constant which results in _____________power outputs per unit weight.
Respuesta
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constant
-
very high
-
proportional
-
comparable
-
efficient
Pregunta 8
Pregunta
A gas turbine is designed with the simplicity of a/an ________ and the advantages of a ______________.
Respuesta
-
steam turbine, internal combustion engine
-
air compressor, diesel engine
-
steam engine, locomotive boiler
-
fuel cell, wind turbine
-
rocket ship, airplane
Pregunta 9
Pregunta
In a gas turbine cycle the phrase Total energy Arrangement means:
Respuesta
-
it is a closed cycle system therefore all energy is contained within the system
-
the system is based on purely theoretical calculations if all the energy was accounted for in the system
-
the turbine provides all the necessary forms of energy
-
the exhaust gases from the GT are passed through a HRSG to produce steam
-
the gas turbine uses exhaust gas from a boiler as combustion air for the combustor
Pregunta 10
Pregunta
A gas turbine arrangement employing the total energy arrangement may be used to provide
1. air conditioning
2. heating
3. electricity
4. cool drinking water
Respuesta
-
1,2,3
-
2,3,4
-
1,2,4
-
1,2,3,4
Pregunta 11
Pregunta
The disadvantage of a closed cycle gas turbine include:
1. higher initial cost 2. more space is required
3. more cooling water needed 4. more components needed
Respuesta
-
1,2,3
-
2,3,4
-
1,3,4
-
1,2,4
-
1,2,3,4
Pregunta 12
Pregunta
The regenerator in a gas turbine system gets its heat from:
Respuesta
-
compressor outlet
-
combustor bypass
-
aux. firing
-
power turbine exhaust
-
a separate heat exchanger
Pregunta 13
Pregunta
Regenerator disadvantages include
1. pressure drop 2. temperature drop
3. fouling of heating surfaces 4. needs a large heating surface
Respuesta
-
1,2,3
-
2,3,4
-
1,3,4
-
1,2,4
-
1,2,3,4
Pregunta 14
Pregunta
using an intercooler in a gas turbine system will
1. create more power
2. lowers the airs specific volume
3. raise the 2nd stage air temp
4. drop some moisture from the air
Respuesta
-
1,2,3
-
2,3,4
-
1,3,4
-
1,2,3,4
-
1,2,4
Pregunta 15
Pregunta
initial ignition in a gas turbine combustor is accomplished using
Respuesta
-
glow plug
-
high voltage plug
-
hot air from the compressor discharge
-
static friction
-
continuous pilot flame
Pregunta 16
Pregunta
The function of the combustor is to
Respuesta
-
burn fuel with excess air
-
increase the kinetic energy of the working fluid
-
increase the compressed air pressure
-
lower NOx emmisions
-
increase the airs specific volume
Pregunta 17
Pregunta
The _________ on a gas turbine can be driven by the load turbine
Respuesta
-
starting motor
-
aux oil system
-
combustor
-
air compressor
-
power turbine
Pregunta 18
Pregunta
A gas turbine compressor may be ________ by design
Respuesta
-
axial or reciprocating
-
screw or radial
-
impulse or reaction
-
radial or axial
-
all of the above
Pregunta 19
Pregunta
Axial air compressor blades are commonly made from
1. aluminum
2. brass
3. titanium
4. stainless steel
Respuesta
-
1,2
-
3,4
-
1,3
-
2,4
-
1,2,3,4
Pregunta 20
Pregunta
Gas turbine casings are usually made from:
Respuesta
-
aluminum alloy or cast iron
-
stainless steel or titanium
-
brass or bronze
-
alloy steel or inconel
-
none of the above
Pregunta 21
Pregunta
The compressor in a gas turbine has to pressurize the air to supply:
Respuesta
-
air to cool the turbine
-
air for expansion in the turbine
-
air for combustion and further expansion through the turbine
-
air to the combustor for cooling
-
air to provide exhaust gas for a HRSG
Pregunta 22
Pregunta
The compressor in a gas turbine system uses up to _________ of the energy supplied by the fuel
Respuesta
-
10%
-
25%
-
50%
-
66%
-
75%
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