This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Shrouding and Lacing Wires”.
1. Shrouding is used to _________ the damping effect.
a) increase
b) decrease
c) avoid
d) none of the mentioned
View Answer
Explanation: Shrouding is used to increase the damping frequency.
2. Shrouding _______ blade flutter.
a) increases
b) reduces
c) doesn’t change
d) none of the mentioned
View Answer
Explanation: Damping effect is increased due to shrouding and blade flutter is reduced.
3. Large electricity generating steam turbine uses shrouding.
a) True
b) False
View Answer
Explanation: Shrouding is used in large electricity generating steam turbine.
4. Shrouding is done to _______ blades.
a) small
b) large
c) every
d) none of the mentioned
View Answer
Explanation: Large blades use shrouding.
5. Shrouding is used for ________ pressure turbines.
a) medium
b) high
c) low
d) none of the mentioned
View Answer
Explanation: Shrouding is used for large blades and low pressure turbines.
6. Shrouding is complemented with lacing wires.
a) True
b) False
View Answer
Explanation: Shrouding is complemented with lacing wires for large blades and low pressure turbines.
7. Lace wires _______ blade flutter.
a) increases
b) reduces
c) doesn’t change
d) none of the mentioned
View Answer
Explanation: Lacing wires are used to reduce blade flutter.
8. Shrouding can also be used for ________ pressure turbines.
a) medium
b) high
c) low
d) none of the mentioned
View Answer
Explanation: Both low and high pressure turbines use shrouding.
9. When shrouding is not required it ____________
a) reduces the blade flutter
b) reduces the centrifugal load
c) reduces the blade flutter & centrifugal load
d) none of the mentioned
View Answer
Explanation: When shrouding is not used it decreases the centrifugal load as the total load on the center of the turbine decreases.
10. When shrouding is not used cooling requirements are also reduced.
a) True
b) False
View Answer
Explanation: Centrifugal load and the cooling requirements can be reduced by shroud less turbines.
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