Test
power prep quiz #8
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Preguntas del test (22)
1A 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- A1,2
- B1,3
- C1,4
- D2,3
- E3,4
2A gas turbine that uses an intercooler during compression
- Ahas it located prior to compression
- Bis located after the compressor but before the combustor
- Chas a higher power output at the turbine
- Drequires a larger starting motor
- Eall of the above
3Intercoolers are used on a gas turbine compressors to:
- Areduce the specific volume of the air
- Bincrease the dewpoint of the air
- Cremove the moisture from the air
- Dincrease the combustor efficiency
- Eincrease compressor life
4A 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- A2,3,4
- B4,5
- C1,3,5
- D2,4
- E1,2,3,4,5
5A regenerator in a gas turbine cycle is also referred to as:
- Aheat exchanger
- Bcyclone
- Cduct burner
- Dintercooler
- Esafety device
6A 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- A1,2
- B2,3
- C3,4
- D1,4
- E2,4
7The flow of air and shaft speed of a gas turbine are fairly constant which results in _____________power outputs per unit weight.
- Aconstant
- Bvery high
- Cproportional
- Dcomparable
- Eefficient
8A gas turbine is designed with the simplicity of a/an ________ and the advantages of a ______________.
- Asteam turbine, internal combustion engine
- Bair compressor, diesel engine
- Csteam engine, locomotive boiler
- Dfuel cell, wind turbine
- Erocket ship, airplane
9In a gas turbine cycle the phrase Total energy Arrangement means:
- Ait is a closed cycle system therefore all energy is contained within the system
- Bthe system is based on purely theoretical calculations if all the energy was accounted for in the system
- Cthe turbine provides all the necessary forms of energy
- Dthe exhaust gases from the GT are passed through a HRSG to produce steam
- Ethe gas turbine uses exhaust gas from a boiler as combustion air for the combustor
10A gas turbine arrangement employing the total energy arrangement may be used to provide
1. air conditioning
2. heating
3. electricity
4. cool drinking water- A1,2,3
- B2,3,4
- C1,2,4
- D1,2,3,4
11The 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- A1,2,3
- B2,3,4
- C1,3,4
- D1,2,4
- E1,2,3,4
12The regenerator in a gas turbine system gets its heat from:
- Acompressor outlet
- Bcombustor bypass
- Caux. firing
- Dpower turbine exhaust
- Ea separate heat exchanger
13Regenerator disadvantages include
1. pressure drop 2. temperature drop
3. fouling of heating surfaces 4. needs a large heating surface- A1,2,3
- B2,3,4
- C1,3,4
- D1,2,4
- E1,2,3,4
14using 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- A1,2,3
- B2,3,4
- C1,3,4
- D1,2,3,4
- E1,2,4
15initial ignition in a gas turbine combustor is accomplished using
- Aglow plug
- Bhigh voltage plug
- Chot air from the compressor discharge
- Dstatic friction
- Econtinuous pilot flame
16The function of the combustor is to
- Aburn fuel with excess air
- Bincrease the kinetic energy of the working fluid
- Cincrease the compressed air pressure
- Dlower NOx emmisions
- Eincrease the airs specific volume
17The _________ on a gas turbine can be driven by the load turbine
- Astarting motor
- Baux oil system
- Ccombustor
- Dair compressor
- Epower turbine
18A gas turbine compressor may be ________ by design
- Aaxial or reciprocating
- Bscrew or radial
- Cimpulse or reaction
- Dradial or axial
- Eall of the above
19Axial air compressor blades are commonly made from
1. aluminum
2. brass
3. titanium
4. stainless steel- A1,2
- B3,4
- C1,3
- D2,4
- E1,2,3,4
20Gas turbine casings are usually made from:
- Aaluminum alloy or cast iron
- Bstainless steel or titanium
- Cbrass or bronze
- Dalloy steel or inconel
- Enone of the above
21The compressor in a gas turbine has to pressurize the air to supply:
- Aair to cool the turbine
- Bair for expansion in the turbine
- Cair for combustion and further expansion through the turbine
- Dair to the combustor for cooling
- Eair to provide exhaust gas for a HRSG
22The compressor in a gas turbine system uses up to _________ of the energy supplied by the fuel
- A10%
- B25%
- C50%
- D66%
- E75%
Información
- Descripción
- power engineering 3b2 Test sobre power prep quiz #8, creado por TRAVIS CANNING el 28/02/2016.
- Autor
- TRAVIS CANNING
- Idioma
- English
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- 13
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