This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Combustion and Thermochemistry”.
1. Combustor is also known as __________
a) flame holder
b) burner
c) flame holder & burner
d) none of the mentioned
View Answer
Explanation: Combustion takes place in combustor. It is also known as flame holder. Combustor can also be called as burner. Flame holder is used to hold the flame in the combustor.
2. In gas turbine combustion chamber is fed with __________ pressure high temperature gas.
a) low
b) high
c) medium
d) none of the mentioned
View Answer
Explanation: In gas turbine combustor is fed with high pressure gas. As the pressure is very high as soon as oxygen is supplied in fuel starts burning.
3. When combustor pressure decreases efficiency _________
a) increases
b) decreases
c) remains constant
d) none of the mentioned
View Answer
Explanation: When combustor pressure decreases its efficiency decreases as it is directly proportional.
4. In an ideal combustor exit temperature must be _________
a) decreasing
b) increasing
c) constant
d) none of the mentioned
View Answer
Explanation: When exit temperature is not uniform thermal stress develops on the walls of combustor.
5. In air crafts combustors are constrained by size and weight.
a) True
b) False
View Answer
Explanation: In air craft combustors are constrained by size and weight.
6. Combustors ________ pollutants.
a) increase
b) decrease
c) remains constant
d) none of the mentioned
View Answer
Explanation: Combustors reduce pollutants. The work of combustor is to assure that fuel is completely burned, when the fuel is completely burned pollutants will be reduced.
7. Swirler is the _____ part in the combustor.
a) first
b) middle
c) last
d) none of the mentioned
View Answer
Explanation: When air enters combustor it firstly passes through swirler where it induces swirling motion.
8. Nitrogen oxides are released from ________
a) combustors
b) burners
c) combustors & burners
d) none of the mentioned
View Answer
Explanation: Nitrogen oxide is also a type of pollutant released from combustor.
9. CO pollutant released from combustor is emitted during _______ process.
a) reduction
b) oxidation
c) co is released no where
d) none of the mentioned
View Answer
Explanation: Carbon monoxide is released during oxidizing process.
10. Nitrogen oxides are produced during combustion zone.
a) True
b) False
View Answer
Explanation: Nitrogen oxides are produced during combustion zone.
Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.
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