Steam and Gas Turbines Questions and Answers – Cascade Principle

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Cascade Principle”.

1. Arrangement of blades in an order to represent the blade ring in Turbo machinery is called as cascade.
a) True
b) False
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2. Cascades __________ the efficiency.
a) decreases
b) increases
c) does not effect
d) none
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3. When steam is passed through the cascade the direction of air __________
a) reverse
b) remains the same
c) turned
d) cascade is nowhere related to direction
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4. Across the turbine cascade static pressure _________
a) drops
b) increases
c) remains same
d) none of the mentioned
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5. Due to the formation of boundary layers on blades friction losses _________
a) remains the same
b) decreases
c) increases
d) none of the mentioned
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6. In compressor cascade when internal pressure is lost ____________
a) axial force is gained
b) axial force is reduced
c) efficiency reduces
d) none of the mentioned
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7. Drag force is parallel to lift force.
a) True
b) False
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8. Due to viscosity lift force is __________
a) increased
b) decreased
c) remains constant
d) none
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9. Due to turbine cascade the drag ________ the lift.
a) increases
b) decreases
c) does not change
d) none of the mentioned
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10. Due to compressor cascade, the static pressure is __________
a) reduced
b) does not change
c) increased
d) none of the mentioned
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Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

To practice all areas of Steam and Gas Turbines, here is complete set of 1000+ Multiple Choice Questions and Answers.