Basic Gas Turbines Interview questions and answers on “Fuels Used in Gas Turbines”.
1. _______ can be used as fuels in gas turbines.
a) Natural gases
b) petroleum
c) Diesel
d) All of the mentioned
Answer: d
Clarification: Natural gases,petrol,diesel etc can be used as fuels in gas turbines. Gas turbines requires liquids with high specific heat as fuels.
2. Vanadium content in the fuels used for gas turbines should be ________
a) high
b) low
c) zero
d) none of the mentioned
Answer: b
Clarification: Vanadium content must be low in the fuels used for gas turbines. Excessive vanadium content in the fuel leads to decrease in the specific heat of the fuel.
3. Fuels used in gas turbines should have _____ ash content.
a) low
b) high
c) zero
d) none of the mentioned
Answer: a
Clarification: Fuels used in gas turbines should have low ash content. When ash content is more calorific value of fuel gets decreased.
4. Gas turbine fuels congeal at __________ degrees are used in Locomotives.
a) -20
b) -10
c) -5
d) -15
Answer: c
Clarification: Gas turbine fuels congeal at -5 degrees are used in locomotives. Congealing temperature is the temperature at which the fuel freezes.
5. Fuels that congeal at ____________ degrees are used in automobiles.
a) -12
b) -15
c) -20
d) -15
Answer: a
Clarification: Fuels that congeal at -12 degrees are used in automobiles. Fuels used in gas turbines in automobiles has a freezing point of -12 degrees.
6. ______ oil can also be used to operate gas turbine power plants.
a) Leaded
b) Non leaded
c) Crude fuel
d) None of the mentioned
Answer:c
Clarification: Crude fuel oil can also be used to operate gas turbine power plants. Crude oil is the unrefined petroleum.
7. Water soluble salts are also removed from the fuels used in gas turbines.
a) True
b) False
Answer: a
Clarification: Water soluble salts are also removed from the fuels used in gas turbines. If the salts are not removed there is a chance for surge formation.
8. lead content must be ______ in gas turbine fuels.
a) high
b) low
c) zero
d) none the mentioned
Answer: b
Clarification: Lead content must be low in gas turbine fuels. If the lead content is increased it decreases the calorific value of the fuel.
9. Power loss will be _____ if impurities are present in gas turbine.
a) zero
b) less
c) high
d) none of the mentioned
Answer: c
Clarification: If impurities are present in fuel it consumes much heat to start combustion and hence power loss takes place.
10. Inhibitors are added to attack the ash developed by combustion of vanadium in gas turbine fuels.
a) True
b) False
Answer: a
Clarification: Inhibitors are added to attack the ash developed by combustion of vanadium in gas turbine fuels. Inhibitors reacts with vanadium and make them easy combustible during combustion.
To practice basic interview questions on all areas of Gas Turbines,