250+ TOP MCQs on Reaction Blade Profiles and Answers

Steam and Gas Turbines Multiple Choice Questions on “Reaction Blade Profiles”.

1. In reaction turbines steam pressure is used in __________ stages.
a) many
b) one
c) two
d) none
Answer: a
Clarification: In reaction turbines turbine rotates due to the reaction of the flow of fluid.

2. In reaction turbine direction of fluid flow is changed drastically.
a) True
b) False
Answer: b
Clarification: In impulse turbine direction of fluid flow is changed drastically where as in reaction turbine the direction is not turned drastically.

3. Steam velocity graph is same for both reaction and impulse turbines.
a) True
b) False
Answer: a
Clarification: Only steam pressure graph differs and steam velocity graph is same for both impulse and reaction turbine.

4. Reaction turbine blades are _________
a) Plate profile type
b) Aerofoil type
c) Circular profile type
d) None of the mentioned
Answer: b
Clarification: Reaction turbine blades are aerofoil type whereas impulse turbine blades are plate profile type.

5. Reaction turbine blades are _____________
a) symmetrical
b) asymmetrical
c) depends on reaction turbine
d) none of the mentioned
Answer: b
Clarification: Reaction turbine blades are asymmetrical.

6. _____________ is run by the impulse of steam.
a) Reaction turbine
b) Reaction & Impulse turbine
c) Impulse turbine
d) None of the mentioned
Answer: c
Clarification: Impulse turbine is run by the impulse of steam.

7. In reaction turbine nozzle directs the ___________ of steam towards the blades.
a) direction
b) rotation
c) direction & rotation
d) none of the mentioned
Answer: b
Clarification: In impulse turbine nozzle directs the direction of steam and whereas in reaction turbine direction of flow directs the rotation of blades.

8. In reaction turbine direction of fluid flow is maintained by _______
a) Nozzles
b) Rotating blades
c) Guide vanes
d) None of the mentioned
Answer: c
Clarification: In reaction turbines the direction of fluid flow is maintained by guide vanes.

9. In reaction turbines fluid ________ while flowing through the passages.
a) expands
b) contracts
c) depends on the flow
d) none of the mentioned
Answer: a
Clarification: In impulse turbines fluid is totally expanded into nozzle and no expansion takes place while flowing through passage whereas in reaction turbine fluid expands during flowing through passage.

10. Different pressures are maintained on ________ sides of reaction turbine blades.
a) one
b) one
c) many
d) none of the mentioned
Answer: d
Clarification: In reaction turbines two different pressure are maintained on two sides as fluid expands during flow.